The Experts below are selected from a list of 306 Experts worldwide ranked by ideXlab platform
John M Vohs - One of the best experts on this subject based on the ideXlab platform.
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novel sofc anodes for the direct electrochemical Oxidation of Hydrocarbons
Journal of Catalysis, 2003Co-Authors: Raymond J Gorte, John M VohsAbstract:Recent developments in solid-oxide fuel cells (SofC) that electrochemically oxidize hydrocarbon fuels to produce electrical power without first reforming them to H2 are described. First, the operating principles of SofCs are reviewed, along with a description of state-of-the-art SofC designs. This is followed by a discussion of the concepts and procedures used in the synthesis of direct-Oxidation fuel cells with anodes based on composites of Cu, ceria, and yttria-stabilized zirconia. The discussion focuses on how heterogeneous catalysis has an important role to play in the development of SofCs that directly oxidize hydrocarbon fuels.
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tape cast solid oxide fuel cells for the direct Oxidation of Hydrocarbons
Journal of The Electrochemical Society, 2001Co-Authors: Seungdoo Park, Raymond J Gorte, John M VohsAbstract:A tape casting method for fabricating solid oxide fuel cells (SofCs) that are active for the direct Oxidation of dry Hydrocarbons is presented. The method relies on the inclusion of pyrolyzable pore formers in the anode green tape in order to produce a porous yttria-stabilized zirconia anode matrix. Wet impregnation was used to add both a metal current collector and an Oxidation catalyst to the anode. The performance characteristics for cells produced using this method while operating on H 2 , CH 4 , and C 4 H 10 are presented.
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Tape cast solid oxide fuel cells for the direct Oxidation of Hydrocarbons
Journal of the Electrochemical Society, 2001Co-Authors: Sungsu Park, Raymond J Gorte, John M VohsAbstract:A tape casting method for fabricating solid oxide fuel cells (SofCs) that are active for the direct Oxidation of dry Hydrocarbons is presented. The method relies on the inclusion of pyrolyzable pore formers in the anode green tape in order to produce a porous yttria-stabilized zirconia anode matrix. Wet impregnation was used to add both a metal current collector and an Oxidation catalyst to the anode. The performance characteristics for cells produced using this method while operating on H-2, CH4, and C4H10 are presented. (C) 2001 The Electrochemical Society.
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applications of heterogeneous catalysis in the direct Oxidation of Hydrocarbons in a solid oxide fuel cell
Applied Catalysis A-general, 2000Co-Authors: Seungdoo Park, Raymond J Gorte, John M VohsAbstract:This review article provides an overview of our recent studies of the direct Oxidation of Hydrocarbons in solid-oxide fuel cells. The use of a thermally stable, highly porous, yttria-stabilized zirconia (YSZ) matrix, which allows for the optimization of the anode composition and catalytic properties, is described. Studies of the direct Oxidation of Hydrocarbons using anodes composed of mixtures of YSZ, copper, ceria and samaria-doped ceria are also presented. The results of these studies demonstrate that copper-ceria based anodes are active for the direct electrocatalytic Oxidation of a wide range of Hydrocarbons including alkanes, alkenes, and aromatics.
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Direct Oxidation of Hydrocarbons in a solid-oxide fuel cell
Nature, 2000Co-Authors: Seungdoo Park, John M Vohs, Raymond J GorteAbstract:The direct electrochemical Oxidation of dry hydrocarbon fuels to generate electrical power has the potential to accelerate substantially the use of fuel cells in transportation and distributed-power applications. Most fuel-cell research has involved the use of hydrogen as the fuel, although the practical generation and storage of hydrogen remains an important technological hurdle. Methane has been successfully oxidized electrochemically, but the susceptibility to carbon formation from other Hydrocarbons that may be present or poor power densities have prevented the application of this simple fuel in practical applications. Here we report the direct, electrochemical Oxidation of various Hydrocarbons (methane, ethane, 1-butene, n-butane and toluene) using a solid-oxide fuel cell at 973 and 1,073 K with a composite anode of copper and ceria (or samaria-doped ceria). We demonstrate that the final products of the Oxidation are CO2 and water, and that reasonable power densities can be achieved. The observation that a solid-oxide fuel cell can be operated on dry Hydrocarbons, including liquid fuels, without reforming, suggests that this type of fuel cell could provide an alternative to hydrogen-based fuel-cell technologies.
Raymond J Gorte - One of the best experts on this subject based on the ideXlab platform.
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novel sofc anodes for the direct electrochemical Oxidation of Hydrocarbons
Journal of Catalysis, 2003Co-Authors: Raymond J Gorte, John M VohsAbstract:Recent developments in solid-oxide fuel cells (SofC) that electrochemically oxidize hydrocarbon fuels to produce electrical power without first reforming them to H2 are described. First, the operating principles of SofCs are reviewed, along with a description of state-of-the-art SofC designs. This is followed by a discussion of the concepts and procedures used in the synthesis of direct-Oxidation fuel cells with anodes based on composites of Cu, ceria, and yttria-stabilized zirconia. The discussion focuses on how heterogeneous catalysis has an important role to play in the development of SofCs that directly oxidize hydrocarbon fuels.
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tape cast solid oxide fuel cells for the direct Oxidation of Hydrocarbons
Journal of The Electrochemical Society, 2001Co-Authors: Seungdoo Park, Raymond J Gorte, John M VohsAbstract:A tape casting method for fabricating solid oxide fuel cells (SofCs) that are active for the direct Oxidation of dry Hydrocarbons is presented. The method relies on the inclusion of pyrolyzable pore formers in the anode green tape in order to produce a porous yttria-stabilized zirconia anode matrix. Wet impregnation was used to add both a metal current collector and an Oxidation catalyst to the anode. The performance characteristics for cells produced using this method while operating on H 2 , CH 4 , and C 4 H 10 are presented.
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Tape cast solid oxide fuel cells for the direct Oxidation of Hydrocarbons
Journal of the Electrochemical Society, 2001Co-Authors: Sungsu Park, Raymond J Gorte, John M VohsAbstract:A tape casting method for fabricating solid oxide fuel cells (SofCs) that are active for the direct Oxidation of dry Hydrocarbons is presented. The method relies on the inclusion of pyrolyzable pore formers in the anode green tape in order to produce a porous yttria-stabilized zirconia anode matrix. Wet impregnation was used to add both a metal current collector and an Oxidation catalyst to the anode. The performance characteristics for cells produced using this method while operating on H-2, CH4, and C4H10 are presented. (C) 2001 The Electrochemical Society.
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applications of heterogeneous catalysis in the direct Oxidation of Hydrocarbons in a solid oxide fuel cell
Applied Catalysis A-general, 2000Co-Authors: Seungdoo Park, Raymond J Gorte, John M VohsAbstract:This review article provides an overview of our recent studies of the direct Oxidation of Hydrocarbons in solid-oxide fuel cells. The use of a thermally stable, highly porous, yttria-stabilized zirconia (YSZ) matrix, which allows for the optimization of the anode composition and catalytic properties, is described. Studies of the direct Oxidation of Hydrocarbons using anodes composed of mixtures of YSZ, copper, ceria and samaria-doped ceria are also presented. The results of these studies demonstrate that copper-ceria based anodes are active for the direct electrocatalytic Oxidation of a wide range of Hydrocarbons including alkanes, alkenes, and aromatics.
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Direct Oxidation of Hydrocarbons in a solid-oxide fuel cell
Nature, 2000Co-Authors: Seungdoo Park, John M Vohs, Raymond J GorteAbstract:The direct electrochemical Oxidation of dry hydrocarbon fuels to generate electrical power has the potential to accelerate substantially the use of fuel cells in transportation and distributed-power applications. Most fuel-cell research has involved the use of hydrogen as the fuel, although the practical generation and storage of hydrogen remains an important technological hurdle. Methane has been successfully oxidized electrochemically, but the susceptibility to carbon formation from other Hydrocarbons that may be present or poor power densities have prevented the application of this simple fuel in practical applications. Here we report the direct, electrochemical Oxidation of various Hydrocarbons (methane, ethane, 1-butene, n-butane and toluene) using a solid-oxide fuel cell at 973 and 1,073 K with a composite anode of copper and ceria (or samaria-doped ceria). We demonstrate that the final products of the Oxidation are CO2 and water, and that reasonable power densities can be achieved. The observation that a solid-oxide fuel cell can be operated on dry Hydrocarbons, including liquid fuels, without reforming, suggests that this type of fuel cell could provide an alternative to hydrogen-based fuel-cell technologies.
Seungdoo Park - One of the best experts on this subject based on the ideXlab platform.
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tape cast solid oxide fuel cells for the direct Oxidation of Hydrocarbons
Journal of The Electrochemical Society, 2001Co-Authors: Seungdoo Park, Raymond J Gorte, John M VohsAbstract:A tape casting method for fabricating solid oxide fuel cells (SofCs) that are active for the direct Oxidation of dry Hydrocarbons is presented. The method relies on the inclusion of pyrolyzable pore formers in the anode green tape in order to produce a porous yttria-stabilized zirconia anode matrix. Wet impregnation was used to add both a metal current collector and an Oxidation catalyst to the anode. The performance characteristics for cells produced using this method while operating on H 2 , CH 4 , and C 4 H 10 are presented.
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applications of heterogeneous catalysis in the direct Oxidation of Hydrocarbons in a solid oxide fuel cell
Applied Catalysis A-general, 2000Co-Authors: Seungdoo Park, Raymond J Gorte, John M VohsAbstract:This review article provides an overview of our recent studies of the direct Oxidation of Hydrocarbons in solid-oxide fuel cells. The use of a thermally stable, highly porous, yttria-stabilized zirconia (YSZ) matrix, which allows for the optimization of the anode composition and catalytic properties, is described. Studies of the direct Oxidation of Hydrocarbons using anodes composed of mixtures of YSZ, copper, ceria and samaria-doped ceria are also presented. The results of these studies demonstrate that copper-ceria based anodes are active for the direct electrocatalytic Oxidation of a wide range of Hydrocarbons including alkanes, alkenes, and aromatics.
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Direct Oxidation of Hydrocarbons in a solid-oxide fuel cell
Nature, 2000Co-Authors: Seungdoo Park, John M Vohs, Raymond J GorteAbstract:The direct electrochemical Oxidation of dry hydrocarbon fuels to generate electrical power has the potential to accelerate substantially the use of fuel cells in transportation and distributed-power applications. Most fuel-cell research has involved the use of hydrogen as the fuel, although the practical generation and storage of hydrogen remains an important technological hurdle. Methane has been successfully oxidized electrochemically, but the susceptibility to carbon formation from other Hydrocarbons that may be present or poor power densities have prevented the application of this simple fuel in practical applications. Here we report the direct, electrochemical Oxidation of various Hydrocarbons (methane, ethane, 1-butene, n-butane and toluene) using a solid-oxide fuel cell at 973 and 1,073 K with a composite anode of copper and ceria (or samaria-doped ceria). We demonstrate that the final products of the Oxidation are CO2 and water, and that reasonable power densities can be achieved. The observation that a solid-oxide fuel cell can be operated on dry Hydrocarbons, including liquid fuels, without reforming, suggests that this type of fuel cell could provide an alternative to hydrogen-based fuel-cell technologies.
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direct Oxidation of Hydrocarbons in a solid oxide fuel cell i methane Oxidation
Journal of The Electrochemical Society, 1999Co-Authors: Seungdoo Park, John M Vohs, Radu Craciun, Raymond J GorteAbstract:The performance of Cu cermets as anodes for the direct Oxidation of in solid oxide fuel cells was examined. Mixtures of Cu and yttria‐stabilized zirconia (YSZ) were found to give similar performance to Ni‐YSZ cermets when was used as the fuel, but did not deactivate in dry . While Cu‐YSZ was essentially inert to methane, the addition of ceria to the anode gave rise to reasonable power densities and stable operation over a period of at least 3 days. Proof of direct Oxidation of came from chemical analysis of the products leaving the cell. The major carbon‐containing product was , with only traces of CO observed, and there was excellent agreement between the actual cell current and that predicted by the methane conversion. These results demonstrate that direct, electrocatalytic Oxidation of dry methane is possible, with reasonable performance. © 1999 The Electrochemical Society. All rights reserved.
Pengfei Zhang - One of the best experts on this subject based on the ideXlab platform.
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mesoporous mnceox solid solutions for low temperature and selective Oxidation of Hydrocarbons
Nature Communications, 2015Co-Authors: Pengfei Zhang, Hanfeng Lu, Ying Zhou, Li Zhang, Zili Wu, Shize Yang, Yinfei ChenAbstract:The development of noble-metal-free heterogeneous catalysts that can realize the aerobic Oxidation of C–H bonds at low temperature is a profound challenge in the catalysis community. Here we report the synthesis of a mesoporous Mn0.5Ce0.5Ox solid solution that is highly active for the selective Oxidation of Hydrocarbons under mild conditions (100–120 °C). Notably, the catalytic performance achieved in the Oxidation of cyclohexane to cyclohexanone/cyclohexanol (100 °C, conversion: 17.7%) is superior to those by the state-of-art commercial catalysts (140–160 °C, conversion: 3-5%). The high activity can be attributed to the formation of a Mn0.5Ce0.5Ox solid solution with an ultrahigh manganese doping concentration in the CeO2 cubic fluorite lattice, leading to maximum active surface oxygens for the activation of C–H bonds and highly reducible Mn4+ ions for the rapid migration of oxygen vacancies from the bulk to the surface. Precious metal free catalysts for aerobic Oxidation of Hydrocarbons are industrially useful materials. Here, the authors report a mesoporous maganese-cerium oxide solid solution that is highly active for the selective Oxidation of C-H bonds in Hydrocarbons under mild conditions.
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solvent free aerobic Oxidation of Hydrocarbons and alcohols with pd n doped carbon from glucose
Nature Communications, 2013Co-Authors: Pengfei Zhang, Yutong Gong, Haoran Li, Zhirong Chen, Yong WangAbstract:The development of efficient catalysts for the aerobic Oxidation of Hydrocarbons to high-value chemicals is industrially important. Here, the authors show that palladium nanoparticles loaded on porous nitrogen-doped carbon are highly active catalysts under laboratory and industrially relevant conditions.
Yinfei Chen - One of the best experts on this subject based on the ideXlab platform.
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mesoporous mnceox solid solutions for low temperature and selective Oxidation of Hydrocarbons
Nature Communications, 2015Co-Authors: Pengfei Zhang, Hanfeng Lu, Ying Zhou, Li Zhang, Zili Wu, Shize Yang, Yinfei ChenAbstract:The development of noble-metal-free heterogeneous catalysts that can realize the aerobic Oxidation of C–H bonds at low temperature is a profound challenge in the catalysis community. Here we report the synthesis of a mesoporous Mn0.5Ce0.5Ox solid solution that is highly active for the selective Oxidation of Hydrocarbons under mild conditions (100–120 °C). Notably, the catalytic performance achieved in the Oxidation of cyclohexane to cyclohexanone/cyclohexanol (100 °C, conversion: 17.7%) is superior to those by the state-of-art commercial catalysts (140–160 °C, conversion: 3-5%). The high activity can be attributed to the formation of a Mn0.5Ce0.5Ox solid solution with an ultrahigh manganese doping concentration in the CeO2 cubic fluorite lattice, leading to maximum active surface oxygens for the activation of C–H bonds and highly reducible Mn4+ ions for the rapid migration of oxygen vacancies from the bulk to the surface. Precious metal free catalysts for aerobic Oxidation of Hydrocarbons are industrially useful materials. Here, the authors report a mesoporous maganese-cerium oxide solid solution that is highly active for the selective Oxidation of C-H bonds in Hydrocarbons under mild conditions.
