Unraveling the pH-Dependent Oxygen Reduction Performance on Single-Atom Catalysts: From Single- to Dual-Sabatier Optima ...

M-N-C single-atom catalysts (SACs) have emerged as a potential substitute for the costly platinum-group catalysts in oxygen reduction reaction (ORR). However, several critical aspects of M-N-C SACs in ORR remain poorly understood, including their pH-dependent activity, selectivity for 2- or 4-electron transfer pathways, and the identification of the rate-determining steps. Herein, analyzing >100 M-N-C structures and >2000 sets of energetics, we unveil a pH-dependent evolution in ORR activity volcanos from a single-peak in alkaline media to a double-peak in acids. We found that this pH-de... Mehr ...

Verfasser: Zhang, Di
Wang, Zhuyu
Liu, Fangzhou
Yi, Peiyun
Peng, Linfa
Chen, Yuan
Wei, Li
Li, Hao
Dokumenttyp: Artikel
Erscheinungsdatum: 2023
Verlag/Hrsg.: arXiv
Schlagwörter: Chemical Physics physics.chem-ph / FOS: Physical sciences
Sprache: unknown
Permalink: https://search.fid-benelux.de/Record/base-29265823
Datenquelle: BASE; Originalkatalog
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Link(s) : https://dx.doi.org/10.48550/arxiv.2308.11182