The Experts below are selected from a list of 26835 Experts worldwide ranked by ideXlab platform
Mu Pan - One of the best experts on this subject based on the ideXlab platform.
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Nitrogen-self-doped carbon with a porous graphene-like structure as a highly efficient catalyst for oxygen reduction
Journal of Materials Chemistry A, 2015Co-Authors: Jian Zhang, Kun Cheng, Chenyu Zhang, Huang Zhou, Mu PanAbstract:A non-noble metal nitrogen (N)-doped carbon catalyst, with a porous graphene-like structure, is prepared by pyrolyzing polyaniline with addition of urea. Herein, urea not only serves as a N source similar to polyaniline by incorporating N atoms into the carbon matrix, but plays a key role in forming the porous graphene-like structured carbon nanosheet. The electrochemical characterization shows that the prepared catalyst with a unique graphene-like structure exhibits an oxygen reduction reaction (ORR) activity that outperforms that of the commercial Pt/C catalyst in alkaline media, its half-wave potential nearly 30 mV more positive than Pt/C, and both superior stability and Fuel (Methanol and CO) tolerance to Pt/C. Significantly, such a catalyst also exhibits a good ORR activity which is comparable to Pt/C, as well as a higher stability than Pt/C in acidic media.
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An animal liver derived non-precious metal catalyst for oxygen reduction with high activity and stability
RSC Advances, 2014Co-Authors: Jian Zhang, Xu Chen, Kun Cheng, Mu PanAbstract:Currently, nitrogen (N) doped carbon materials, as the most promising non-precious metal catalysts (NPMCs) for oxygen reduction reaction (ORR) for low temperature Fuel cells, have become a research hotspot. However, most of the N sources are derived from expensive organic monomers or ammonia, which are either expensive or harmful to human health. Here we demonstrate a facile and green strategy to synthesize a novel N-self-doped carbon nanoporous material with high surface area using pork liver (PL) both as N and carbon source; the prepared catalyst possesses an outstanding electrocatalytic activity towards ORR, and both superior stability and Fuel (Methanol and CO) tolerance compared to the conventional Pt/C catalyst. This work supplies a new paradigm for taking advantage of the abundant animal waste resources in energy conversion materials.
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Egg derived nitrogen-self-doped carbon/carbon nanotube hybrids as noble-metal-free catalysts for oxygen reduction
Journal of Power Sources, 2014Co-Authors: Jian Zhang, Xu Chen, Mu PanAbstract:Abstract Currently, the development of nitrogen (N) doped carbon based non-precious metal ORR catalysts has become one of the most attractive topics in low temperature Fuel cells. Here, we demonstrate a green synthesis route of N-self-doped carbon materials by using eggs as N sources combining with iron sources and multi-walled carbon nanotubes (CE–Fe–MWNT). After carbonized, such hybrid materials possess an outstanding electrocatalytic activity towards ORR comparable to the commercial Pt/C catalyst in alkaline media, and both superior stability and Fuel (Methanol and CO) tolerance than the commercial Pt/C catalyst, which provide a promising alternative to noble metal catalysts by using abundant natural biological resources.
Jian Zhang - One of the best experts on this subject based on the ideXlab platform.
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Nitrogen-self-doped carbon with a porous graphene-like structure as a highly efficient catalyst for oxygen reduction
Journal of Materials Chemistry A, 2015Co-Authors: Jian Zhang, Kun Cheng, Chenyu Zhang, Huang Zhou, Mu PanAbstract:A non-noble metal nitrogen (N)-doped carbon catalyst, with a porous graphene-like structure, is prepared by pyrolyzing polyaniline with addition of urea. Herein, urea not only serves as a N source similar to polyaniline by incorporating N atoms into the carbon matrix, but plays a key role in forming the porous graphene-like structured carbon nanosheet. The electrochemical characterization shows that the prepared catalyst with a unique graphene-like structure exhibits an oxygen reduction reaction (ORR) activity that outperforms that of the commercial Pt/C catalyst in alkaline media, its half-wave potential nearly 30 mV more positive than Pt/C, and both superior stability and Fuel (Methanol and CO) tolerance to Pt/C. Significantly, such a catalyst also exhibits a good ORR activity which is comparable to Pt/C, as well as a higher stability than Pt/C in acidic media.
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An animal liver derived non-precious metal catalyst for oxygen reduction with high activity and stability
RSC Advances, 2014Co-Authors: Jian Zhang, Xu Chen, Kun Cheng, Mu PanAbstract:Currently, nitrogen (N) doped carbon materials, as the most promising non-precious metal catalysts (NPMCs) for oxygen reduction reaction (ORR) for low temperature Fuel cells, have become a research hotspot. However, most of the N sources are derived from expensive organic monomers or ammonia, which are either expensive or harmful to human health. Here we demonstrate a facile and green strategy to synthesize a novel N-self-doped carbon nanoporous material with high surface area using pork liver (PL) both as N and carbon source; the prepared catalyst possesses an outstanding electrocatalytic activity towards ORR, and both superior stability and Fuel (Methanol and CO) tolerance compared to the conventional Pt/C catalyst. This work supplies a new paradigm for taking advantage of the abundant animal waste resources in energy conversion materials.
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Egg derived nitrogen-self-doped carbon/carbon nanotube hybrids as noble-metal-free catalysts for oxygen reduction
Journal of Power Sources, 2014Co-Authors: Jian Zhang, Xu Chen, Mu PanAbstract:Abstract Currently, the development of nitrogen (N) doped carbon based non-precious metal ORR catalysts has become one of the most attractive topics in low temperature Fuel cells. Here, we demonstrate a green synthesis route of N-self-doped carbon materials by using eggs as N sources combining with iron sources and multi-walled carbon nanotubes (CE–Fe–MWNT). After carbonized, such hybrid materials possess an outstanding electrocatalytic activity towards ORR comparable to the commercial Pt/C catalyst in alkaline media, and both superior stability and Fuel (Methanol and CO) tolerance than the commercial Pt/C catalyst, which provide a promising alternative to noble metal catalysts by using abundant natural biological resources.
Pei Kang Shen - One of the best experts on this subject based on the ideXlab platform.
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Nitrogen-self-doped graphene-based non-precious metal catalyst with superior performance to Pt/C catalyst toward oxygen reduction reaction
Journal of Materials Chemistry A, 2014Co-Authors: Jiu Jun Zhang, Pei Kang ShenAbstract:A new, simple and scalable synthesis methodology is invented for an N-self-doped graphene-based non-precious Fe catalyst (Fe–N-graphene) for the oxygen reduction reaction (ORR) both in acidic and alkaline media. The electrochemical characterization shows that this Fe–N-graphene catalyst possesses outstanding electrocatalytic ORR activity (similar to Pt/C catalyst in alkaline media and slightly lower in acidic media), and both superior stability and Fuel (Methanol and CO) tolerance to Pt/C catalysts. We believe that this is the first time for a non-precious metal catalyst to have superior ORR performance to Pt/C catalyst. In addition, our synthesis methodology can be scaled up for the mass production of N-self-doped graphene-based Fuel cell non-noble metal catalysts and other nanomaterials.
Liu Guo-ji - One of the best experts on this subject based on the ideXlab platform.
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Synthesis of Fuel Methanol from Straw Gas
Chemical Industry and Engineering, 2006Co-Authors: Liu Guo-jiAbstract:Straw is a kind of important renewable energy.In this paper,the research is focused on using straw gas as stock and synthesizing Fuel Methanol over a domestic C301 Cu-based catalyst.The experimental results showed that the optimum operating pressure,temperature and the GHSV of the syngas was 5.0 MPa,237 ℃,(8 500 L)/(kg(cat)·h),and the maximum time-space yield rate of Methanol was 0.23 kg/(kg(cat)·h).Also the deactivation reason of the catalyst was discussed.
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Methanol Catalytic Synthesis from Cornstalk Gases
Journal of Tianjin University, 2005Co-Authors: Liu Guo-jiAbstract:Biomass energy is a renewable resource. Experiments on purification technologies for the conversion of cornstalk biomass into the industrial product (synthesis of Fuel Methanol) were made to produce cornstalk gas (low heat value) in the down-flow fixed by the gasifier. The experiment focused on the technical procedures for deoxygenation, catalytic cracking of tar, hydrogenation, etc. Quality straw syngas was produced for Methanol synthesis. The catalysis of Methanol synthesis for the production of cornstalk syngas was carried out in a tubular-flow integral and isothermal reactor under the pressure of 5 MPa over Cu-based catalyst C301 (particle size: 0.833 mm×0.351 mm) , a catalyst made in China. Thirty-three sets of test data were obtained. The test results showed that the Methanol could be synthesized directly from cornstalk gas( low heat value) through proper treatment. The proper operation temperature of the synthetic reaction was 230-250℃; the suitable flow of syngas was 0. 8-1.0 mol/h; and the better Methanol lime-space yield was 0. 24 kg/( kgcat·h).
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Study on the catalytic experiment of Methanol synthesis for agricultural residues
Renewable Energy, 2004Co-Authors: Liu Guo-jiAbstract:In order to realize to change the agriculture residues into the Fuel Methanol,the optimum experiments of the synthesis gas produced in Fuel gas of cornstalk were performed.The catalytic experiments of Methanol synthesis for biomass syngas,starting from CO/CO2/H2 over a domestic Cu-based catalyst C301,were carried out in an integral reactor under pressure of 5 MPa.
Kun Cheng - One of the best experts on this subject based on the ideXlab platform.
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Nitrogen-self-doped carbon with a porous graphene-like structure as a highly efficient catalyst for oxygen reduction
Journal of Materials Chemistry A, 2015Co-Authors: Jian Zhang, Kun Cheng, Chenyu Zhang, Huang Zhou, Mu PanAbstract:A non-noble metal nitrogen (N)-doped carbon catalyst, with a porous graphene-like structure, is prepared by pyrolyzing polyaniline with addition of urea. Herein, urea not only serves as a N source similar to polyaniline by incorporating N atoms into the carbon matrix, but plays a key role in forming the porous graphene-like structured carbon nanosheet. The electrochemical characterization shows that the prepared catalyst with a unique graphene-like structure exhibits an oxygen reduction reaction (ORR) activity that outperforms that of the commercial Pt/C catalyst in alkaline media, its half-wave potential nearly 30 mV more positive than Pt/C, and both superior stability and Fuel (Methanol and CO) tolerance to Pt/C. Significantly, such a catalyst also exhibits a good ORR activity which is comparable to Pt/C, as well as a higher stability than Pt/C in acidic media.
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An animal liver derived non-precious metal catalyst for oxygen reduction with high activity and stability
RSC Advances, 2014Co-Authors: Jian Zhang, Xu Chen, Kun Cheng, Mu PanAbstract:Currently, nitrogen (N) doped carbon materials, as the most promising non-precious metal catalysts (NPMCs) for oxygen reduction reaction (ORR) for low temperature Fuel cells, have become a research hotspot. However, most of the N sources are derived from expensive organic monomers or ammonia, which are either expensive or harmful to human health. Here we demonstrate a facile and green strategy to synthesize a novel N-self-doped carbon nanoporous material with high surface area using pork liver (PL) both as N and carbon source; the prepared catalyst possesses an outstanding electrocatalytic activity towards ORR, and both superior stability and Fuel (Methanol and CO) tolerance compared to the conventional Pt/C catalyst. This work supplies a new paradigm for taking advantage of the abundant animal waste resources in energy conversion materials.
