Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 58, Issue 5, Pages 1442-1446Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201812662
Keywords
alkaline polymer electrolyte; fuel cells; hydrogen oxidation reaction; platinum; temperature
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Funding
- National Key Research and Development Program of China [2016YFB0101203]
- National Natural Science Foundation of China [91545205, 21633008, 21872108]
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The Pt-catalyzed hydrogen oxidation reaction (HOR) for alkaline polymer electrolyte fuel cells (APEFCs) has been one of the focus subjects in current fuel-cell research. The Pt catalyst is inferior for HOR in alkaline solutions, and alloying with Ru is an effective promotion strategy. APEFCs with Pt-Ru anodes have provided a performance benchmark over 1 W cm(-2) at 60 degrees C. The Pt anode is now found to be in fact as good as the Pt-Ru anode for APEFCs operated at elevated conditions. At 80 degrees C with appropriate gas back-pressure, the cell with a Pt anode exhibits a peak power density of about 1.9 W cm(-2), which is very close to that with a Pt-Ru anode. Even by decreasing the anode Pt loading to 0.1 mg cm(-2), over 1.5 W cm(-2) can still be achieved at 80 degrees C. This finding alters the previous understanding about the Pt catalyzed HOR in alkaline media and casts a new light on the development of practical and high-power APFEC technology.
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