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- Title
Customized reaction route for ruthenium oxide towards stabilized water oxidation in high-performance PEM electrolyzers.
- Authors
Shi, Zhaoping; Li, Ji; Wang, Yibo; Liu, Shiwei; Zhu, Jianbing; Yang, Jiahao; Wang, Xian; Ni, Jing; Jiang, Zheng; Zhang, Lijuan; Wang, Ying; Liu, Changpeng; Xing, Wei; Ge, Junjie
- Abstract
The poor stability of Ru-based acidic oxygen evolution (OER) electrocatalysts has greatly hampered their application in polymer electrolyte membrane electrolyzers (PEMWEs). Traditional understanding of performance degradation centered on influence of bias fails in describing the stability trend, calling for deep dive into the essential origin of inactivation. Here we uncover the decisive role of reaction route (including catalytic mechanism and intermediates binding strength) on operational stability of Ru-based catalysts. Using MRuOx (M = Ce4+, Sn4+, Ru4+, Cr4+) solid solution as structure model, we find the reaction route, thereby stability, can be customized by controlling the Ru charge. The screened SnRuOx thus exhibits orders of magnitude lifespan extension. A scalable PEMWE single cell using SnRuOx anode conveys an ever-smallest degradation rate of 53 μV h−1 during a 1300 h operation at 1 A cm−2. The poor stability of ruthenium-based catalysts has greatly hampered their application in polymer electrolyte membrane water electrolysis. Here, the authors uncover the decisive role of reaction route on catalytic performance, which enables the screening of efficient ruthenium-based water oxidation catalysts.
- Subjects
RUTHENIUM oxides; OXIDATION of water; POLYMERIC membranes; ELECTROLYTIC cells; POLYELECTROLYTES; WATER electrolysis; SOLID solutions
- Publication
Nature Communications, 2023, Vol 14, Issue 1, p1
- ISSN
2041-1723
- Publication type
Article
- DOI
10.1038/s41467-023-36380-9