Customized reaction route for ruthenium oxide towards stabilized water oxidation in high-performance PEM electrolyzers
-
DOI number:
10.1038/s41467-023-36380-9
-
Journal:
nature communication
-
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 findthe reactionroute,thereby stability, can be customizedbycontrolling the Ru charge. The screened SnRuO x thus exhibits orders of magnitude lifespan
extension. A scalable PEMWE single cell using SnRuO x anode conveys an ever smallest degradation rate of 53 μV h−1 during a 1300h operation at 1A cm−2.
-
Indexed by:
Journal paper
-
Correspondence Author:
Junjie Ge
-
Volume:
14
-
Page Number:
843
-
Translation or Not:
no
-
Date of Publication:
2023-01-26
