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Revealing the conce...
Revealing the concentration of hydrogen peroxide in fuel cell catalyst layers by an in-operando approach
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Qiu, Chun-Yu (författare)
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Wan, Li-yang (författare)
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Wang, Yu-Cheng (författare)
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Rauf, Muhammad (författare)
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Hong, Yu-Hao (författare)
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- Yuan, Jia-yin, 1979- (författare)
- Stockholms universitet,Institutionen för material- och miljökemi (MMK)
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Zhou, Zhi-You (författare)
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Sun, Shi-Gang (författare)
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(creator_code:org_t)
- 2022
- 2022
- Engelska.
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Ingår i: Chinese Journal of Catalysis. - 1872-2067. ; 43:7, s. 1918-1926
- Relaterad länk:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- To evaluate the H2O2-tolerance of non-Pt oxygen reduction reaction (ORR) catalysts as well as investigate the H2O2-induced decay mechanism, the selection of an appropriate H2O2 concentration is a prerequisite. However, the concentration criterion is still unclear because of the lack of in-operando methods to determine the actual concentration of H2O2 in fuel cell catalyst layers. In this work, an electrochemical probe method was successfully established to in-operando monitor the H2O2 in non-Pt catalyst layers for the first time. The local concentration of H2O2 was revealed to reach 17 mmol/L, which is one order of magnitude higher than that under aqueous electrodes test conditions. Powered by the new knowledge, a concentration criterion of at least 17 mmol/L is suggested. This work fills in the large gap between aqueous electrode tests and the real fuel cell working conditions, and highlights the importance of in-operando monitoring methods.
Ämnesord
- NATURVETENSKAP -- Kemi (hsv//swe)
- NATURAL SCIENCES -- Chemical Sciences (hsv//eng)
Nyckelord
- Fuel cells
- Oxygen reduction reaction
- Non-Pt catalyst layer
- H 2 O 2 concentration
- Catalyst degradation
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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