Publication: The formation of unsaturated IrOx in SrIrO3 by cobalt-doping for acidic oxygen evolution reaction
Дата
2024
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Аннотация
Abstract Electrocatalytic water splitting is a promising route for sustainable hydrogen production. However, the high overpotential of the anodic oxygen evolution reaction poses significant challenge. SrIrO 3 -based perovskite-type catalysts have shown great potential for acidic oxygen evolution reaction, but the origins of their high activity are still unclear. Herein, we develop a Co-doped SrIrO 3 system to enhance oxygen evolution reaction activity and elucidate the origin of catalytic activity. In situ experiments reveal Co activates surface lattice oxygen, rapidly exposing IrO x active sites, while bulk Co doping optimizes the adsorbate binding energy of IrO x . The Co-doped SrIrO 3 demonstrates high oxygen evolution reaction electrocatalytic activity, markedly surpassing the commercial IrO 2 catalysts in both conventional electrolyzer and proton exchange membrane water electrolyzer.
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Ключевые слова
Oxygen evolution , Overpotential , Electrolysis of water , Water Splitting
Цитирование
The formation of unsaturated IrOx in SrIrO3 by cobalt-doping for acidic oxygen evolution reaction / Zhao, J. -W. [et al.] // Nature communications. - 2024. - 15. - № 1. - 10.1038/s41467-024-46801-y