Toward Platinum Group Metal-Free Catalysts for Hydrogen/Air Proton-Exchange Membrane Fuel Cells: Catalyst activity in platinum-free substitute cathode and anode materials
The status, concepts and challenges toward catalysts free of platinum group metal (pgm) elements for proton-exchange membrane fuel cells (PEMFC) are reviewed. Due to the limited reserves of noble metals in the Earth’s crust, a major challenge for the worldwide development of PEMFC technology is to r...
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description | The status, concepts and challenges toward catalysts free of platinum group metal (pgm) elements for proton-exchange membrane fuel cells (PEMFC) are reviewed. Due to the limited reserves of noble metals in the Earth’s crust, a major challenge for the worldwide development of PEMFC technology is to replace Pt with pgm-free catalysts with sufficient activity and stability. The priority target is the substitution of cathode catalysts (oxygen reduction) that account for more than 80% of pgms in current PEMFCs. Regarding hydrogen oxidation at the anode, ultralow Pt content electrodes have demonstrated good performance, but alternative non-pgm anode catalysts are desirable to increase fuel cell robustness, decrease the H
2
purity requirements and ease the transition from H
2
derived from natural gas to H
2
produced from water and renewable energy sources. |
doi_str_mv | 10.1595/205651318X696828 |
format | Article |
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2
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2
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subjects | Anodes Anodizing Catalysts Chemical Sciences Earth crust Fuel cells Natural gas Noble metals Oxidation Proton exchange membrane fuel cells Protons Renewable energy sources |
title | Toward Platinum Group Metal-Free Catalysts for Hydrogen/Air Proton-Exchange Membrane Fuel Cells: Catalyst activity in platinum-free substitute cathode and anode materials |
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