Lattice modulation strategy toward efficient and durable RuO2-based catalysts for acidic water oxidation

IF 3.5 3区工程技术 Q2 ENGINEERING, CHEMICAL

AIChE Journal Pub Date : 2024-12-08 DOI:10.1002/aic.18665

Linkai Han, Zhonghua Xiang

引用次数: 0

Abstract

Rutile RuO₂ is recognized for its outstanding acidic oxygen evolution reaction (OER) activity and notable cost advantage compared to iridium oxide for proton exchange membrane water electrolyzers (PEMWEs). However, the unsatisfactory stability of RuO₂ hinders its practical application. Here, we report a lattice modulation strategy to enhance both the OER activity and stability of RuO₂. Interestingly, the newly synthesized Mo_0.15Nb_0.05-RuO₂, with Mo doped first and then Nb, presents the greatest lattice spacing and possesses an overpotential of merely 205 mV at 10 mA cm⁻², which significantly outperforms Nb_0.05Mo_0.15-RuO₂ (239 mV), where Nb was doped first followed by Mo, as well as the initial RuO₂ (323 mV). Remarkably, Mo_0.15Nb_0.05-RuO₂ requires only 1.76 V to achieve 1 A cm⁻² and exhibits exceptional stability in PEMWE testing, with a voltage rise of only 58 mV at 200 mA cm⁻² for more than 80 h.

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来源期刊

AIChE Journal 工程技术-工程：化工

CiteScore

7.10

自引率

10.80%

发文量

411

审稿时长

3.6 months

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