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Raghunath V. Chaudhari - One of the best experts on this subject based on the ideXlab platform.
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Synergistic Effects of Bimetallic PtPd/TiO2 Nanocatalysts in Oxidation of Glucose to Glucaric Acid: Structure Dependent Activity and Selectivity
Industrial & Engineering Chemistry Research, 2016Co-Authors: Xin Jin, Meng Zhao, Jian Shen, Wenjuan Yan, Prem S. Thapa, Bala Subramaniam, Muzzammil Vora, Chun Zeng, Raghunath V. ChaudhariAbstract:Direct oxidation of glucose with enhanced selectivity to Glucaric Acid with tartronic and oxalic Acids as coproducts is reported using bimetallic PtPd/TiO2 catalysts under mild conditions. Bimetallic PtPd catalysts display significantly enhanced catalytic activity (turnover frequency (TOF) 2404 h–1) and improved selectivity to Glucaric Acid (S 44%) in glucose oxidation compared to monometallic catalysts (TOF 248 h–1, S 4%). Oxidation of glucose follows a consecutive reaction with gluconic Acid as an intermediate with inhibition of the second step (to Glucaric Acid and C–C cleavage reactions) by the presence of glucose. Surface characterization using TEM, SEM, chemisorption, UV–vis spectroscopy, and XRD distinguished the particle morphologies and provided insights into structure–activity relations. A reaction pathway for glucose oxidation is proposed based on the product distribution. These results provide new insights into the design of bimetallic catalysts for the oxidation of glucose to Glucaric Acid.
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synergistic effects of bimetallic ptpd tio2 nanocatalysts in oxidation of glucose to Glucaric Acid structure dependent activity and selectivity
Industrial & Engineering Chemistry Research, 2016Co-Authors: Xin Jin, Meng Zhao, Jian Shen, Wenjuan Yan, Prem S. Thapa, Bala Subramaniam, Muzzammil Vora, Chun Zeng, Raghunath V. ChaudhariAbstract:Direct oxidation of glucose with enhanced selectivity to Glucaric Acid with tartronic and oxalic Acids as coproducts is reported using bimetallic PtPd/TiO2 catalysts under mild conditions. Bimetallic PtPd catalysts display significantly enhanced catalytic activity (turnover frequency (TOF) 2404 h–1) and improved selectivity to Glucaric Acid (S 44%) in glucose oxidation compared to monometallic catalysts (TOF 248 h–1, S 4%). Oxidation of glucose follows a consecutive reaction with gluconic Acid as an intermediate with inhibition of the second step (to Glucaric Acid and C–C cleavage reactions) by the presence of glucose. Surface characterization using TEM, SEM, chemisorption, UV–vis spectroscopy, and XRD distinguished the particle morphologies and provided insights into structure–activity relations. A reaction pathway for glucose oxidation is proposed based on the product distribution. These results provide new insights into the design of bimetallic catalysts for the oxidation of glucose to Glucaric Acid.
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Synergistic Effects of Bimetallic PtPd/TiO2 Nanocatalysts in Oxidation of Glucose to Glucaric Acid: Structure Dependent Activity and Selectivity
2016Co-Authors: Xin Jin, Meng Zhao, Jian Shen, Wenjuan Yan, Prem S. Thapa, Bala Subramaniam, Muzzammil Vora, Chun Zeng, Raghunath V. ChaudhariAbstract:Direct oxidation of glucose with enhanced selectivity to Glucaric Acid with tartronic and oxalic Acids as coproducts is reported using bimetallic PtPd/TiO2 catalysts under mild conditions. Bimetallic PtPd catalysts display significantly enhanced catalytic activity (turnover frequency (TOF) 2404 h–1) and improved selectivity to Glucaric Acid (S 44%) in glucose oxidation compared to monometallic catalysts (TOF 248 h–1, S 4%). Oxidation of glucose follows a consecutive reaction with gluconic Acid as an intermediate with inhibition of the second step (to Glucaric Acid and C–C cleavage reactions) by the presence of glucose. Surface characterization using TEM, SEM, chemisorption, UV–vis spectroscopy, and XRD distinguished the particle morphologies and provided insights into structure–activity relations. A reaction pathway for glucose oxidation is proposed based on the product distribution. These results provide new insights into the design of bimetallic catalysts for the oxidation of glucose to Glucaric Acid
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exceptional performance of bimetallic pt1cu3 tio2 nanocatalysts for oxidation of gluconic Acid and glucose with o2 to Glucaric Acid
Journal of Catalysis, 2015Co-Authors: Xin Jin, Meng Zhao, Jian Shen, Wenjuan Yan, Prem S. Thapa, Shenqiang Ren, Bala Subramaniam, Raghunath V. ChaudhariAbstract:Abstract Catalytic synthesis of Glucaric Acid by oxidation of gluconic Acid/glucose using novel TiO 2 -supported bimetallic PtCu catalysts and O 2 as oxidant is reported, with significantly enhanced activity and selectivity compared to those in previous work. Bimetallic alloy Pt 1 Cu 3 catalysts supported on TiO 2 display unusual synergy and exceptional oxidation activity (3543 h −1 ) compared with monometallic Pt and Cu catalysts (13–550 h −1 ), with 46% Glucaric Acid selectivity at 45 °C and 0.1 MPa O 2 . Further, it is shown with the Pt 1 Cu 3 alloy catalyst that glucose may also be directly oxidized to Glucaric Acid and co-products (tartronic and oxalic Acids). The oxidation catalyst reported here provides a green route for making Glucaric Acid, eliminating conventionally used stoichiometric reagents such as mineral Acids and bleach enhancers.
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Exceptional performance of bimetallic Pt1Cu3/TiO2 nanocatalysts for oxidation of gluconic Acid and glucose with O2 to Glucaric Acid
Journal of Catalysis, 2015Co-Authors: Xin Jin, Meng Zhao, Jian Shen, Wenjuan Yan, Prem S. Thapa, Shenqiang Ren, Bala Subramaniam, Raghunath V. ChaudhariAbstract:Abstract Catalytic synthesis of Glucaric Acid by oxidation of gluconic Acid/glucose using novel TiO 2 -supported bimetallic PtCu catalysts and O 2 as oxidant is reported, with significantly enhanced activity and selectivity compared to those in previous work. Bimetallic alloy Pt 1 Cu 3 catalysts supported on TiO 2 display unusual synergy and exceptional oxidation activity (3543 h −1 ) compared with monometallic Pt and Cu catalysts (13–550 h −1 ), with 46% Glucaric Acid selectivity at 45 °C and 0.1 MPa O 2 . Further, it is shown with the Pt 1 Cu 3 alloy catalyst that glucose may also be directly oxidized to Glucaric Acid and co-products (tartronic and oxalic Acids). The oxidation catalyst reported here provides a green route for making Glucaric Acid, eliminating conventionally used stoichiometric reagents such as mineral Acids and bleach enhancers.
Xin Jin - One of the best experts on this subject based on the ideXlab platform.
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Synergistic Effects of Bimetallic PtPd/TiO2 Nanocatalysts in Oxidation of Glucose to Glucaric Acid: Structure Dependent Activity and Selectivity
Industrial & Engineering Chemistry Research, 2016Co-Authors: Xin Jin, Meng Zhao, Jian Shen, Wenjuan Yan, Prem S. Thapa, Bala Subramaniam, Muzzammil Vora, Chun Zeng, Raghunath V. ChaudhariAbstract:Direct oxidation of glucose with enhanced selectivity to Glucaric Acid with tartronic and oxalic Acids as coproducts is reported using bimetallic PtPd/TiO2 catalysts under mild conditions. Bimetallic PtPd catalysts display significantly enhanced catalytic activity (turnover frequency (TOF) 2404 h–1) and improved selectivity to Glucaric Acid (S 44%) in glucose oxidation compared to monometallic catalysts (TOF 248 h–1, S 4%). Oxidation of glucose follows a consecutive reaction with gluconic Acid as an intermediate with inhibition of the second step (to Glucaric Acid and C–C cleavage reactions) by the presence of glucose. Surface characterization using TEM, SEM, chemisorption, UV–vis spectroscopy, and XRD distinguished the particle morphologies and provided insights into structure–activity relations. A reaction pathway for glucose oxidation is proposed based on the product distribution. These results provide new insights into the design of bimetallic catalysts for the oxidation of glucose to Glucaric Acid.
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synergistic effects of bimetallic ptpd tio2 nanocatalysts in oxidation of glucose to Glucaric Acid structure dependent activity and selectivity
Industrial & Engineering Chemistry Research, 2016Co-Authors: Xin Jin, Meng Zhao, Jian Shen, Wenjuan Yan, Prem S. Thapa, Bala Subramaniam, Muzzammil Vora, Chun Zeng, Raghunath V. ChaudhariAbstract:Direct oxidation of glucose with enhanced selectivity to Glucaric Acid with tartronic and oxalic Acids as coproducts is reported using bimetallic PtPd/TiO2 catalysts under mild conditions. Bimetallic PtPd catalysts display significantly enhanced catalytic activity (turnover frequency (TOF) 2404 h–1) and improved selectivity to Glucaric Acid (S 44%) in glucose oxidation compared to monometallic catalysts (TOF 248 h–1, S 4%). Oxidation of glucose follows a consecutive reaction with gluconic Acid as an intermediate with inhibition of the second step (to Glucaric Acid and C–C cleavage reactions) by the presence of glucose. Surface characterization using TEM, SEM, chemisorption, UV–vis spectroscopy, and XRD distinguished the particle morphologies and provided insights into structure–activity relations. A reaction pathway for glucose oxidation is proposed based on the product distribution. These results provide new insights into the design of bimetallic catalysts for the oxidation of glucose to Glucaric Acid.
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Synergistic Effects of Bimetallic PtPd/TiO2 Nanocatalysts in Oxidation of Glucose to Glucaric Acid: Structure Dependent Activity and Selectivity
2016Co-Authors: Xin Jin, Meng Zhao, Jian Shen, Wenjuan Yan, Prem S. Thapa, Bala Subramaniam, Muzzammil Vora, Chun Zeng, Raghunath V. ChaudhariAbstract:Direct oxidation of glucose with enhanced selectivity to Glucaric Acid with tartronic and oxalic Acids as coproducts is reported using bimetallic PtPd/TiO2 catalysts under mild conditions. Bimetallic PtPd catalysts display significantly enhanced catalytic activity (turnover frequency (TOF) 2404 h–1) and improved selectivity to Glucaric Acid (S 44%) in glucose oxidation compared to monometallic catalysts (TOF 248 h–1, S 4%). Oxidation of glucose follows a consecutive reaction with gluconic Acid as an intermediate with inhibition of the second step (to Glucaric Acid and C–C cleavage reactions) by the presence of glucose. Surface characterization using TEM, SEM, chemisorption, UV–vis spectroscopy, and XRD distinguished the particle morphologies and provided insights into structure–activity relations. A reaction pathway for glucose oxidation is proposed based on the product distribution. These results provide new insights into the design of bimetallic catalysts for the oxidation of glucose to Glucaric Acid
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exceptional performance of bimetallic pt1cu3 tio2 nanocatalysts for oxidation of gluconic Acid and glucose with o2 to Glucaric Acid
Journal of Catalysis, 2015Co-Authors: Xin Jin, Meng Zhao, Jian Shen, Wenjuan Yan, Prem S. Thapa, Shenqiang Ren, Bala Subramaniam, Raghunath V. ChaudhariAbstract:Abstract Catalytic synthesis of Glucaric Acid by oxidation of gluconic Acid/glucose using novel TiO 2 -supported bimetallic PtCu catalysts and O 2 as oxidant is reported, with significantly enhanced activity and selectivity compared to those in previous work. Bimetallic alloy Pt 1 Cu 3 catalysts supported on TiO 2 display unusual synergy and exceptional oxidation activity (3543 h −1 ) compared with monometallic Pt and Cu catalysts (13–550 h −1 ), with 46% Glucaric Acid selectivity at 45 °C and 0.1 MPa O 2 . Further, it is shown with the Pt 1 Cu 3 alloy catalyst that glucose may also be directly oxidized to Glucaric Acid and co-products (tartronic and oxalic Acids). The oxidation catalyst reported here provides a green route for making Glucaric Acid, eliminating conventionally used stoichiometric reagents such as mineral Acids and bleach enhancers.
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Exceptional performance of bimetallic Pt1Cu3/TiO2 nanocatalysts for oxidation of gluconic Acid and glucose with O2 to Glucaric Acid
Journal of Catalysis, 2015Co-Authors: Xin Jin, Meng Zhao, Jian Shen, Wenjuan Yan, Prem S. Thapa, Shenqiang Ren, Bala Subramaniam, Raghunath V. ChaudhariAbstract:Abstract Catalytic synthesis of Glucaric Acid by oxidation of gluconic Acid/glucose using novel TiO 2 -supported bimetallic PtCu catalysts and O 2 as oxidant is reported, with significantly enhanced activity and selectivity compared to those in previous work. Bimetallic alloy Pt 1 Cu 3 catalysts supported on TiO 2 display unusual synergy and exceptional oxidation activity (3543 h −1 ) compared with monometallic Pt and Cu catalysts (13–550 h −1 ), with 46% Glucaric Acid selectivity at 45 °C and 0.1 MPa O 2 . Further, it is shown with the Pt 1 Cu 3 alloy catalyst that glucose may also be directly oxidized to Glucaric Acid and co-products (tartronic and oxalic Acids). The oxidation catalyst reported here provides a green route for making Glucaric Acid, eliminating conventionally used stoichiometric reagents such as mineral Acids and bleach enhancers.
Meng Zhao - One of the best experts on this subject based on the ideXlab platform.
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Synergistic Effects of Bimetallic PtPd/TiO2 Nanocatalysts in Oxidation of Glucose to Glucaric Acid: Structure Dependent Activity and Selectivity
Industrial & Engineering Chemistry Research, 2016Co-Authors: Xin Jin, Meng Zhao, Jian Shen, Wenjuan Yan, Prem S. Thapa, Bala Subramaniam, Muzzammil Vora, Chun Zeng, Raghunath V. ChaudhariAbstract:Direct oxidation of glucose with enhanced selectivity to Glucaric Acid with tartronic and oxalic Acids as coproducts is reported using bimetallic PtPd/TiO2 catalysts under mild conditions. Bimetallic PtPd catalysts display significantly enhanced catalytic activity (turnover frequency (TOF) 2404 h–1) and improved selectivity to Glucaric Acid (S 44%) in glucose oxidation compared to monometallic catalysts (TOF 248 h–1, S 4%). Oxidation of glucose follows a consecutive reaction with gluconic Acid as an intermediate with inhibition of the second step (to Glucaric Acid and C–C cleavage reactions) by the presence of glucose. Surface characterization using TEM, SEM, chemisorption, UV–vis spectroscopy, and XRD distinguished the particle morphologies and provided insights into structure–activity relations. A reaction pathway for glucose oxidation is proposed based on the product distribution. These results provide new insights into the design of bimetallic catalysts for the oxidation of glucose to Glucaric Acid.
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synergistic effects of bimetallic ptpd tio2 nanocatalysts in oxidation of glucose to Glucaric Acid structure dependent activity and selectivity
Industrial & Engineering Chemistry Research, 2016Co-Authors: Xin Jin, Meng Zhao, Jian Shen, Wenjuan Yan, Prem S. Thapa, Bala Subramaniam, Muzzammil Vora, Chun Zeng, Raghunath V. ChaudhariAbstract:Direct oxidation of glucose with enhanced selectivity to Glucaric Acid with tartronic and oxalic Acids as coproducts is reported using bimetallic PtPd/TiO2 catalysts under mild conditions. Bimetallic PtPd catalysts display significantly enhanced catalytic activity (turnover frequency (TOF) 2404 h–1) and improved selectivity to Glucaric Acid (S 44%) in glucose oxidation compared to monometallic catalysts (TOF 248 h–1, S 4%). Oxidation of glucose follows a consecutive reaction with gluconic Acid as an intermediate with inhibition of the second step (to Glucaric Acid and C–C cleavage reactions) by the presence of glucose. Surface characterization using TEM, SEM, chemisorption, UV–vis spectroscopy, and XRD distinguished the particle morphologies and provided insights into structure–activity relations. A reaction pathway for glucose oxidation is proposed based on the product distribution. These results provide new insights into the design of bimetallic catalysts for the oxidation of glucose to Glucaric Acid.
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Synergistic Effects of Bimetallic PtPd/TiO2 Nanocatalysts in Oxidation of Glucose to Glucaric Acid: Structure Dependent Activity and Selectivity
2016Co-Authors: Xin Jin, Meng Zhao, Jian Shen, Wenjuan Yan, Prem S. Thapa, Bala Subramaniam, Muzzammil Vora, Chun Zeng, Raghunath V. ChaudhariAbstract:Direct oxidation of glucose with enhanced selectivity to Glucaric Acid with tartronic and oxalic Acids as coproducts is reported using bimetallic PtPd/TiO2 catalysts under mild conditions. Bimetallic PtPd catalysts display significantly enhanced catalytic activity (turnover frequency (TOF) 2404 h–1) and improved selectivity to Glucaric Acid (S 44%) in glucose oxidation compared to monometallic catalysts (TOF 248 h–1, S 4%). Oxidation of glucose follows a consecutive reaction with gluconic Acid as an intermediate with inhibition of the second step (to Glucaric Acid and C–C cleavage reactions) by the presence of glucose. Surface characterization using TEM, SEM, chemisorption, UV–vis spectroscopy, and XRD distinguished the particle morphologies and provided insights into structure–activity relations. A reaction pathway for glucose oxidation is proposed based on the product distribution. These results provide new insights into the design of bimetallic catalysts for the oxidation of glucose to Glucaric Acid
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exceptional performance of bimetallic pt1cu3 tio2 nanocatalysts for oxidation of gluconic Acid and glucose with o2 to Glucaric Acid
Journal of Catalysis, 2015Co-Authors: Xin Jin, Meng Zhao, Jian Shen, Wenjuan Yan, Prem S. Thapa, Shenqiang Ren, Bala Subramaniam, Raghunath V. ChaudhariAbstract:Abstract Catalytic synthesis of Glucaric Acid by oxidation of gluconic Acid/glucose using novel TiO 2 -supported bimetallic PtCu catalysts and O 2 as oxidant is reported, with significantly enhanced activity and selectivity compared to those in previous work. Bimetallic alloy Pt 1 Cu 3 catalysts supported on TiO 2 display unusual synergy and exceptional oxidation activity (3543 h −1 ) compared with monometallic Pt and Cu catalysts (13–550 h −1 ), with 46% Glucaric Acid selectivity at 45 °C and 0.1 MPa O 2 . Further, it is shown with the Pt 1 Cu 3 alloy catalyst that glucose may also be directly oxidized to Glucaric Acid and co-products (tartronic and oxalic Acids). The oxidation catalyst reported here provides a green route for making Glucaric Acid, eliminating conventionally used stoichiometric reagents such as mineral Acids and bleach enhancers.
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Exceptional performance of bimetallic Pt1Cu3/TiO2 nanocatalysts for oxidation of gluconic Acid and glucose with O2 to Glucaric Acid
Journal of Catalysis, 2015Co-Authors: Xin Jin, Meng Zhao, Jian Shen, Wenjuan Yan, Prem S. Thapa, Shenqiang Ren, Bala Subramaniam, Raghunath V. ChaudhariAbstract:Abstract Catalytic synthesis of Glucaric Acid by oxidation of gluconic Acid/glucose using novel TiO 2 -supported bimetallic PtCu catalysts and O 2 as oxidant is reported, with significantly enhanced activity and selectivity compared to those in previous work. Bimetallic alloy Pt 1 Cu 3 catalysts supported on TiO 2 display unusual synergy and exceptional oxidation activity (3543 h −1 ) compared with monometallic Pt and Cu catalysts (13–550 h −1 ), with 46% Glucaric Acid selectivity at 45 °C and 0.1 MPa O 2 . Further, it is shown with the Pt 1 Cu 3 alloy catalyst that glucose may also be directly oxidized to Glucaric Acid and co-products (tartronic and oxalic Acids). The oxidation catalyst reported here provides a green route for making Glucaric Acid, eliminating conventionally used stoichiometric reagents such as mineral Acids and bleach enhancers.
Jian Shen - One of the best experts on this subject based on the ideXlab platform.
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Synergistic Effects of Bimetallic PtPd/TiO2 Nanocatalysts in Oxidation of Glucose to Glucaric Acid: Structure Dependent Activity and Selectivity
Industrial & Engineering Chemistry Research, 2016Co-Authors: Xin Jin, Meng Zhao, Jian Shen, Wenjuan Yan, Prem S. Thapa, Bala Subramaniam, Muzzammil Vora, Chun Zeng, Raghunath V. ChaudhariAbstract:Direct oxidation of glucose with enhanced selectivity to Glucaric Acid with tartronic and oxalic Acids as coproducts is reported using bimetallic PtPd/TiO2 catalysts under mild conditions. Bimetallic PtPd catalysts display significantly enhanced catalytic activity (turnover frequency (TOF) 2404 h–1) and improved selectivity to Glucaric Acid (S 44%) in glucose oxidation compared to monometallic catalysts (TOF 248 h–1, S 4%). Oxidation of glucose follows a consecutive reaction with gluconic Acid as an intermediate with inhibition of the second step (to Glucaric Acid and C–C cleavage reactions) by the presence of glucose. Surface characterization using TEM, SEM, chemisorption, UV–vis spectroscopy, and XRD distinguished the particle morphologies and provided insights into structure–activity relations. A reaction pathway for glucose oxidation is proposed based on the product distribution. These results provide new insights into the design of bimetallic catalysts for the oxidation of glucose to Glucaric Acid.
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synergistic effects of bimetallic ptpd tio2 nanocatalysts in oxidation of glucose to Glucaric Acid structure dependent activity and selectivity
Industrial & Engineering Chemistry Research, 2016Co-Authors: Xin Jin, Meng Zhao, Jian Shen, Wenjuan Yan, Prem S. Thapa, Bala Subramaniam, Muzzammil Vora, Chun Zeng, Raghunath V. ChaudhariAbstract:Direct oxidation of glucose with enhanced selectivity to Glucaric Acid with tartronic and oxalic Acids as coproducts is reported using bimetallic PtPd/TiO2 catalysts under mild conditions. Bimetallic PtPd catalysts display significantly enhanced catalytic activity (turnover frequency (TOF) 2404 h–1) and improved selectivity to Glucaric Acid (S 44%) in glucose oxidation compared to monometallic catalysts (TOF 248 h–1, S 4%). Oxidation of glucose follows a consecutive reaction with gluconic Acid as an intermediate with inhibition of the second step (to Glucaric Acid and C–C cleavage reactions) by the presence of glucose. Surface characterization using TEM, SEM, chemisorption, UV–vis spectroscopy, and XRD distinguished the particle morphologies and provided insights into structure–activity relations. A reaction pathway for glucose oxidation is proposed based on the product distribution. These results provide new insights into the design of bimetallic catalysts for the oxidation of glucose to Glucaric Acid.
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Synergistic Effects of Bimetallic PtPd/TiO2 Nanocatalysts in Oxidation of Glucose to Glucaric Acid: Structure Dependent Activity and Selectivity
2016Co-Authors: Xin Jin, Meng Zhao, Jian Shen, Wenjuan Yan, Prem S. Thapa, Bala Subramaniam, Muzzammil Vora, Chun Zeng, Raghunath V. ChaudhariAbstract:Direct oxidation of glucose with enhanced selectivity to Glucaric Acid with tartronic and oxalic Acids as coproducts is reported using bimetallic PtPd/TiO2 catalysts under mild conditions. Bimetallic PtPd catalysts display significantly enhanced catalytic activity (turnover frequency (TOF) 2404 h–1) and improved selectivity to Glucaric Acid (S 44%) in glucose oxidation compared to monometallic catalysts (TOF 248 h–1, S 4%). Oxidation of glucose follows a consecutive reaction with gluconic Acid as an intermediate with inhibition of the second step (to Glucaric Acid and C–C cleavage reactions) by the presence of glucose. Surface characterization using TEM, SEM, chemisorption, UV–vis spectroscopy, and XRD distinguished the particle morphologies and provided insights into structure–activity relations. A reaction pathway for glucose oxidation is proposed based on the product distribution. These results provide new insights into the design of bimetallic catalysts for the oxidation of glucose to Glucaric Acid
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exceptional performance of bimetallic pt1cu3 tio2 nanocatalysts for oxidation of gluconic Acid and glucose with o2 to Glucaric Acid
Journal of Catalysis, 2015Co-Authors: Xin Jin, Meng Zhao, Jian Shen, Wenjuan Yan, Prem S. Thapa, Shenqiang Ren, Bala Subramaniam, Raghunath V. ChaudhariAbstract:Abstract Catalytic synthesis of Glucaric Acid by oxidation of gluconic Acid/glucose using novel TiO 2 -supported bimetallic PtCu catalysts and O 2 as oxidant is reported, with significantly enhanced activity and selectivity compared to those in previous work. Bimetallic alloy Pt 1 Cu 3 catalysts supported on TiO 2 display unusual synergy and exceptional oxidation activity (3543 h −1 ) compared with monometallic Pt and Cu catalysts (13–550 h −1 ), with 46% Glucaric Acid selectivity at 45 °C and 0.1 MPa O 2 . Further, it is shown with the Pt 1 Cu 3 alloy catalyst that glucose may also be directly oxidized to Glucaric Acid and co-products (tartronic and oxalic Acids). The oxidation catalyst reported here provides a green route for making Glucaric Acid, eliminating conventionally used stoichiometric reagents such as mineral Acids and bleach enhancers.
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Exceptional performance of bimetallic Pt1Cu3/TiO2 nanocatalysts for oxidation of gluconic Acid and glucose with O2 to Glucaric Acid
Journal of Catalysis, 2015Co-Authors: Xin Jin, Meng Zhao, Jian Shen, Wenjuan Yan, Prem S. Thapa, Shenqiang Ren, Bala Subramaniam, Raghunath V. ChaudhariAbstract:Abstract Catalytic synthesis of Glucaric Acid by oxidation of gluconic Acid/glucose using novel TiO 2 -supported bimetallic PtCu catalysts and O 2 as oxidant is reported, with significantly enhanced activity and selectivity compared to those in previous work. Bimetallic alloy Pt 1 Cu 3 catalysts supported on TiO 2 display unusual synergy and exceptional oxidation activity (3543 h −1 ) compared with monometallic Pt and Cu catalysts (13–550 h −1 ), with 46% Glucaric Acid selectivity at 45 °C and 0.1 MPa O 2 . Further, it is shown with the Pt 1 Cu 3 alloy catalyst that glucose may also be directly oxidized to Glucaric Acid and co-products (tartronic and oxalic Acids). The oxidation catalyst reported here provides a green route for making Glucaric Acid, eliminating conventionally used stoichiometric reagents such as mineral Acids and bleach enhancers.
Wenjuan Yan - One of the best experts on this subject based on the ideXlab platform.
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Synergistic Effects of Bimetallic PtPd/TiO2 Nanocatalysts in Oxidation of Glucose to Glucaric Acid: Structure Dependent Activity and Selectivity
Industrial & Engineering Chemistry Research, 2016Co-Authors: Xin Jin, Meng Zhao, Jian Shen, Wenjuan Yan, Prem S. Thapa, Bala Subramaniam, Muzzammil Vora, Chun Zeng, Raghunath V. ChaudhariAbstract:Direct oxidation of glucose with enhanced selectivity to Glucaric Acid with tartronic and oxalic Acids as coproducts is reported using bimetallic PtPd/TiO2 catalysts under mild conditions. Bimetallic PtPd catalysts display significantly enhanced catalytic activity (turnover frequency (TOF) 2404 h–1) and improved selectivity to Glucaric Acid (S 44%) in glucose oxidation compared to monometallic catalysts (TOF 248 h–1, S 4%). Oxidation of glucose follows a consecutive reaction with gluconic Acid as an intermediate with inhibition of the second step (to Glucaric Acid and C–C cleavage reactions) by the presence of glucose. Surface characterization using TEM, SEM, chemisorption, UV–vis spectroscopy, and XRD distinguished the particle morphologies and provided insights into structure–activity relations. A reaction pathway for glucose oxidation is proposed based on the product distribution. These results provide new insights into the design of bimetallic catalysts for the oxidation of glucose to Glucaric Acid.
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synergistic effects of bimetallic ptpd tio2 nanocatalysts in oxidation of glucose to Glucaric Acid structure dependent activity and selectivity
Industrial & Engineering Chemistry Research, 2016Co-Authors: Xin Jin, Meng Zhao, Jian Shen, Wenjuan Yan, Prem S. Thapa, Bala Subramaniam, Muzzammil Vora, Chun Zeng, Raghunath V. ChaudhariAbstract:Direct oxidation of glucose with enhanced selectivity to Glucaric Acid with tartronic and oxalic Acids as coproducts is reported using bimetallic PtPd/TiO2 catalysts under mild conditions. Bimetallic PtPd catalysts display significantly enhanced catalytic activity (turnover frequency (TOF) 2404 h–1) and improved selectivity to Glucaric Acid (S 44%) in glucose oxidation compared to monometallic catalysts (TOF 248 h–1, S 4%). Oxidation of glucose follows a consecutive reaction with gluconic Acid as an intermediate with inhibition of the second step (to Glucaric Acid and C–C cleavage reactions) by the presence of glucose. Surface characterization using TEM, SEM, chemisorption, UV–vis spectroscopy, and XRD distinguished the particle morphologies and provided insights into structure–activity relations. A reaction pathway for glucose oxidation is proposed based on the product distribution. These results provide new insights into the design of bimetallic catalysts for the oxidation of glucose to Glucaric Acid.
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Synergistic Effects of Bimetallic PtPd/TiO2 Nanocatalysts in Oxidation of Glucose to Glucaric Acid: Structure Dependent Activity and Selectivity
2016Co-Authors: Xin Jin, Meng Zhao, Jian Shen, Wenjuan Yan, Prem S. Thapa, Bala Subramaniam, Muzzammil Vora, Chun Zeng, Raghunath V. ChaudhariAbstract:Direct oxidation of glucose with enhanced selectivity to Glucaric Acid with tartronic and oxalic Acids as coproducts is reported using bimetallic PtPd/TiO2 catalysts under mild conditions. Bimetallic PtPd catalysts display significantly enhanced catalytic activity (turnover frequency (TOF) 2404 h–1) and improved selectivity to Glucaric Acid (S 44%) in glucose oxidation compared to monometallic catalysts (TOF 248 h–1, S 4%). Oxidation of glucose follows a consecutive reaction with gluconic Acid as an intermediate with inhibition of the second step (to Glucaric Acid and C–C cleavage reactions) by the presence of glucose. Surface characterization using TEM, SEM, chemisorption, UV–vis spectroscopy, and XRD distinguished the particle morphologies and provided insights into structure–activity relations. A reaction pathway for glucose oxidation is proposed based on the product distribution. These results provide new insights into the design of bimetallic catalysts for the oxidation of glucose to Glucaric Acid
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exceptional performance of bimetallic pt1cu3 tio2 nanocatalysts for oxidation of gluconic Acid and glucose with o2 to Glucaric Acid
Journal of Catalysis, 2015Co-Authors: Xin Jin, Meng Zhao, Jian Shen, Wenjuan Yan, Prem S. Thapa, Shenqiang Ren, Bala Subramaniam, Raghunath V. ChaudhariAbstract:Abstract Catalytic synthesis of Glucaric Acid by oxidation of gluconic Acid/glucose using novel TiO 2 -supported bimetallic PtCu catalysts and O 2 as oxidant is reported, with significantly enhanced activity and selectivity compared to those in previous work. Bimetallic alloy Pt 1 Cu 3 catalysts supported on TiO 2 display unusual synergy and exceptional oxidation activity (3543 h −1 ) compared with monometallic Pt and Cu catalysts (13–550 h −1 ), with 46% Glucaric Acid selectivity at 45 °C and 0.1 MPa O 2 . Further, it is shown with the Pt 1 Cu 3 alloy catalyst that glucose may also be directly oxidized to Glucaric Acid and co-products (tartronic and oxalic Acids). The oxidation catalyst reported here provides a green route for making Glucaric Acid, eliminating conventionally used stoichiometric reagents such as mineral Acids and bleach enhancers.
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Exceptional performance of bimetallic Pt1Cu3/TiO2 nanocatalysts for oxidation of gluconic Acid and glucose with O2 to Glucaric Acid
Journal of Catalysis, 2015Co-Authors: Xin Jin, Meng Zhao, Jian Shen, Wenjuan Yan, Prem S. Thapa, Shenqiang Ren, Bala Subramaniam, Raghunath V. ChaudhariAbstract:Abstract Catalytic synthesis of Glucaric Acid by oxidation of gluconic Acid/glucose using novel TiO 2 -supported bimetallic PtCu catalysts and O 2 as oxidant is reported, with significantly enhanced activity and selectivity compared to those in previous work. Bimetallic alloy Pt 1 Cu 3 catalysts supported on TiO 2 display unusual synergy and exceptional oxidation activity (3543 h −1 ) compared with monometallic Pt and Cu catalysts (13–550 h −1 ), with 46% Glucaric Acid selectivity at 45 °C and 0.1 MPa O 2 . Further, it is shown with the Pt 1 Cu 3 alloy catalyst that glucose may also be directly oxidized to Glucaric Acid and co-products (tartronic and oxalic Acids). The oxidation catalyst reported here provides a green route for making Glucaric Acid, eliminating conventionally used stoichiometric reagents such as mineral Acids and bleach enhancers.