The Experts below are selected from a list of 47139 Experts worldwide ranked by ideXlab platform
Joseph W. Stevenson - One of the best experts on this subject based on the ideXlab platform.
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the role of platinum in Proton Exchange Membrane fuel cells
Platinum Metals Review, 2013Co-Authors: Oliver T. Holton, Joseph W. StevensonAbstract:Johnson Matthey, Orchard Road, Royston, Hertfordshire SG8 5HE, UK Email: *oliver.holton@matthey.com; **joe.stevenson@matthey.com Proton Exchange Membrane fuel cells (PEMFCs) dominate the transportation fuel cell market and platinum (Pt) is the catalyst material used for both anode and cathode. This review sets out the fundamentals of activity, selectivity, stability and poisoning resistance which make Pt or its alloys the best available materials to use in this application. It is clear that Pt is the only element which can meet the requirements for performance while avoiding slow reaction kinetics, Proton Exchange Membrane (PEM) system degradation due to hydrogen peroxide (H2O2) formation and catalyst degradation due to metal leaching. Some of the means by which the performance of Pt can be enhanced are also discussed.
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The role of platinum in Proton Exchange Membrane fuel cells
Platinum Metals Review, 2013Co-Authors: Oliver T. Holton, Joseph W. StevensonAbstract:Proton Exchange Membrane fuel cells (PEMFCs) dominate the transportation fuel cell market and platinum (Pt) is the catalyst material used for both anode and cathode. This review sets out the fundamentals of activity, selectivity, stability and poisoning resistance which make Pt or its alloys the best available materials to use in this application. It is clear that Pt is the only element which can meet the requirements for performance while avoiding slow reaction kinetics, Proton Exchange Membrane (PEM) system degradation due to hydrogen peroxide (H2O2) formation and catalyst degradation due to metal leaching. Some of the means by which the performance of Pt can be enhanced are also discussed.
Oliver T. Holton - One of the best experts on this subject based on the ideXlab platform.
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the role of platinum in Proton Exchange Membrane fuel cells
Platinum Metals Review, 2013Co-Authors: Oliver T. Holton, Joseph W. StevensonAbstract:Johnson Matthey, Orchard Road, Royston, Hertfordshire SG8 5HE, UK Email: *oliver.holton@matthey.com; **joe.stevenson@matthey.com Proton Exchange Membrane fuel cells (PEMFCs) dominate the transportation fuel cell market and platinum (Pt) is the catalyst material used for both anode and cathode. This review sets out the fundamentals of activity, selectivity, stability and poisoning resistance which make Pt or its alloys the best available materials to use in this application. It is clear that Pt is the only element which can meet the requirements for performance while avoiding slow reaction kinetics, Proton Exchange Membrane (PEM) system degradation due to hydrogen peroxide (H2O2) formation and catalyst degradation due to metal leaching. Some of the means by which the performance of Pt can be enhanced are also discussed.
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The role of platinum in Proton Exchange Membrane fuel cells
Platinum Metals Review, 2013Co-Authors: Oliver T. Holton, Joseph W. StevensonAbstract:Proton Exchange Membrane fuel cells (PEMFCs) dominate the transportation fuel cell market and platinum (Pt) is the catalyst material used for both anode and cathode. This review sets out the fundamentals of activity, selectivity, stability and poisoning resistance which make Pt or its alloys the best available materials to use in this application. It is clear that Pt is the only element which can meet the requirements for performance while avoiding slow reaction kinetics, Proton Exchange Membrane (PEM) system degradation due to hydrogen peroxide (H2O2) formation and catalyst degradation due to metal leaching. Some of the means by which the performance of Pt can be enhanced are also discussed.
Joong Hee Lee - One of the best experts on this subject based on the ideXlab platform.
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Polymer Membranes for high temperature Proton Exchange Membrane fuel cell: Recent advances and challenges
Progress in Polymer Science, 2011Co-Authors: Saswata Bose, Thi Xuan Hien Nguyen, Nam-hoon Kim, Kin-tak Lau, Tapas Kuila, Joong Hee LeeAbstract:Proton-Exchange Membrane fuel cells (PEMFCs) are considered to be a promising technology for efficient power generation in the 21st century. Currently, high temperature Proton Exchange Membrane fuel cells (HT-PEMFC) offer several advantages, such as high Proton conductivity, low permeability to fuel, low electro-osmotic drag coefficient, good chemical/thermal stability, good mechanical properties and low cost. Owing to the aforementioned features, high temperature Proton Exchange Membrane fuel cells have been utilized more widely compared to low temperature Proton Exchange Membrane fuel cells, which contain certain limitations, such as carbon monoxide poisoning, heat management, water leaching, etc. This review examines the inspiration for HT-PEMFC development, the technological constraints, and recent advances. Various classes of polymers, such as sulfonated hydrocarbon polymers, acid–base polymers and blend polymers, have been analyzed to fulfill the key requirements of high temperature operation of Proton Exchange Membrane fuel cells (PEMFC). The effect of inorganic additives on the performance of HT-PEMFC has been scrutinized. A detailed discussion of the synthesis of polymer, Membrane fabrication and physicochemical characterizations is provided. The Proton conductivity and cell performance of the polymeric Membranes can be improved by high temperature treatment. The mechanical and water retention properties have shown significant improvement., However, there is scope for further research from the perspective of achieving improvements in certain areas, such as optimizing the thermal and chemical stability of the polymer, acid management, and the integral interface between the electrode and Membrane.
Saswata Bose - One of the best experts on this subject based on the ideXlab platform.
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Polymer Membranes for high temperature Proton Exchange Membrane fuel cell: Recent advances and challenges
Progress in Polymer Science, 2011Co-Authors: Saswata Bose, Thi Xuan Hien Nguyen, Nam-hoon Kim, Kin-tak Lau, Tapas Kuila, Joong Hee LeeAbstract:Proton-Exchange Membrane fuel cells (PEMFCs) are considered to be a promising technology for efficient power generation in the 21st century. Currently, high temperature Proton Exchange Membrane fuel cells (HT-PEMFC) offer several advantages, such as high Proton conductivity, low permeability to fuel, low electro-osmotic drag coefficient, good chemical/thermal stability, good mechanical properties and low cost. Owing to the aforementioned features, high temperature Proton Exchange Membrane fuel cells have been utilized more widely compared to low temperature Proton Exchange Membrane fuel cells, which contain certain limitations, such as carbon monoxide poisoning, heat management, water leaching, etc. This review examines the inspiration for HT-PEMFC development, the technological constraints, and recent advances. Various classes of polymers, such as sulfonated hydrocarbon polymers, acid–base polymers and blend polymers, have been analyzed to fulfill the key requirements of high temperature operation of Proton Exchange Membrane fuel cells (PEMFC). The effect of inorganic additives on the performance of HT-PEMFC has been scrutinized. A detailed discussion of the synthesis of polymer, Membrane fabrication and physicochemical characterizations is provided. The Proton conductivity and cell performance of the polymeric Membranes can be improved by high temperature treatment. The mechanical and water retention properties have shown significant improvement., However, there is scope for further research from the perspective of achieving improvements in certain areas, such as optimizing the thermal and chemical stability of the polymer, acid management, and the integral interface between the electrode and Membrane.
Tong Zhang - One of the best experts on this subject based on the ideXlab platform.
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the reactant starvation of the Proton Exchange Membrane fuel cells for vehicular applications a review
Energy Conversion and Management, 2019Co-Authors: Huicui Chen, Xin Zhao, Tong ZhangAbstract:Abstract The short service life of fuel cell is a key problem that restricts the commercialization of fuel cell vehicles. Many scholars have found that gas starvation is one of the most important causes of the Proton Exchange Membrane fuel cell lifetime decay, which leads to a series of severe consequences such as carbon support corrosion, cell reversal and output performance degradation. However, accurate diagnosis and effective mitigation of fuel cell gas starvation are not achieved currently. Gas starvation is a condition that the reaction gas of Proton Exchange Membrane fuel cell working in the sub-stoichiometric state. In this paper, we will study the causes, severe consequences, diagnostic methods and mitigation measures of the gas starvation in Proton Exchange Membrane fuel cells through previous literature review. This research is aim to provide guidance to the diagnose methods, to optimize the system control strategy and structure design and to contribute to the studies which are focus on prolong the Proton Exchange Membrane fuel cell lifetime.
