期刊
JOURNAL OF ENERGY CHEMISTRY
卷 68, 期 -, 页码 143-153出版社
ELSEVIER
DOI: 10.1016/j.jechem.2021.09.031
关键词
Nitrogen doped graphene; Low-temperature hydrogen fuel cell; Catalyst degradation; Carbon corrosion
资金
- Engineering and Physical Sciences Research Council (EPSRC) [EP/P009050/1, EP/S021531/1]
- EPSRC [EP/R00661X/1, EP/S019367/1, EP/P025021/1, EP/P025498/1]
- European Commission H2020 ERC Starter grant EvoluTEM [715502]
- European Research Council (ERC) [715502] Funding Source: European Research Council (ERC)
Nitrogen doping of carbon enhances the performance and durability of catalysts for proton exchange membrane fuel cells, improving the performance of low-temperature hydrogen fuel cells and achieving a more stable working state.
Nitrogen doping of the carbon is an important method to improve the performance and durability of catalysts for proton exchange membrane fuel cells by platinum-nitrogen and carbon-nitrogen bonds. This study shows that p-phenyl groups and graphitic N acting bridges linking platinum and the graphene/carbon black (the ratio graphene/carbon black = 2/3) hybrid support materials achieved the average size of platinum nanoparticles with (4.88 +/- 1.79) nm. It improved the performance of the lower-temperature hydrogen fuel cell up to 0.934 W cm(-2) at 0.60 V, which is 1.55 times greater than that of commercial Pt/C. Doping also enhanced the interaction between Pt and the support materials, and the resistance to corrosion, thus improving the durability of the low-temperature hydrogen fuel cell with a much lower decay of 10 mV at 0.80 A cm(-2) after 30 k cycles of an in-situ accelerated stress test of catalyst degradation than that of 92 mV in Pt/C, which achieves the target of Department of Energy (<30 mV). Meanwhile, Pt/NrEGo(2)-CB3 remains 78% of initial power density at 1.5 A cm(-2) after 5 k cycles of in-situ accelerated stress test of carbon corrosion, which is more stable than the power density of commercial Pt/C, keeping only 54% after accelerated stress test. (C) 2021 Science Press and Dalian Institute of Chemical Physics, Chinese Academy of Sciences Published by Elsevier Journals. All rights reserved.
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