How to appropriately assess the oxygen reduction reaction activity of platinum group metal catalysts with rotating disk electrode.

Autor:	Xia YF; MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, State Key Lab of Urban Water Resources and Environment, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150001, China.; School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150001, China., Guo P; MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, State Key Lab of Urban Water Resources and Environment, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150001, China., Li JZ; Department of Chemistry, Tsinghua University, Beijing 100084, China., Zhao L; MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, State Key Lab of Urban Water Resources and Environment, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150001, China., Sui XL; Shenzhen Key Laboratory of Special Functional Materials, College of Materials Science and Engineering, Shenzhen University, Shenzhen 518060, China., Wang Y; School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150001, China., Wang ZB; MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, State Key Lab of Urban Water Resources and Environment, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150001, China.; Shenzhen Key Laboratory of Special Functional Materials, College of Materials Science and Engineering, Shenzhen University, Shenzhen 518060, China.
Jazyk:	angličtina
Zdroj:	IScience [iScience] 2021 Aug 23; Vol. 24 (9), pp. 103024. Date of Electronic Publication: 2021 Aug 23 (Print Publication: 2021).
DOI:	10.1016/j.isci.2021.103024
Abstrakt:	The sluggish oxygen reduction reaction (ORR) has becoming the bottleneck of largescale implementation of proton exchange membrane fuel cells. However, when it comes to the ORR activity assessing of platinum group metals (PGMs) with rotating disk electrode, the corresponding potential conversion vs. reversible hydrogen electrode, test protocols, and activity calculation processes are still in chaos in many published literatures. In this work, two standard calculation processes for PGM ORR activities are demonstrated, followed by a specification for the usage of reference electrodes. Then a 4-fold discrepancy in ORR activities obtained via different test protocols is found for the same Pt/C, and an average adsorption model and the "coverage effects" are proposed to illustrate the hysteresis loop between negative and positive-going ORR polarization plots. Finally, four motions over appropriate assessment of PGM ORR activity are emphasized, hoping to bring a fair communication platform for researchers from different groups. Competing Interests: The authors declare no competing interests. (© 2021 The Author(s).)
Databáze:	MEDLINE
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