催化作用
析氧
氧气
过电位
掺杂剂
钌
化学
密度泛函理论
解耦(概率)
兴奋剂
无机化学
吸附
光化学
再分配(选举)
化学工程
空位缺陷
氧化还原
材料科学
化学物理
反应机理
电子转移
分解水
活化能
纳米技术
机制(生物学)
作者
Tiantian Yao,Qiang Fu,Kaixi Wang,Yifei Xu,Lei Lin,Shengyu Ma,Bo Lei,Hu Wei,Jun Zhong,Yang Li,XianJie Wang,Ping Xu,Bo Song
出处
期刊:ACS Nano
[American Chemical Society]
日期:2026-01-05
卷期号:20 (2): 2510-2522
被引量:7
标识
DOI:10.1021/acsnano.5c21185
摘要
Precise regulation of the oxygen evolution reaction (OER) pathway to a more favorable lattice oxygen mechanism (LOM) is essential for achieving high-performance acidic OER electrocatalysts. Although cation doping and oxygen vacancy (Ov) engineering are fundamental strategies, their individual contributions to activating the LOM mechanism remain unclear. Herein, we report a Ru-doped Co3O4 catalyst enriched with Ov (Ru–Co3O4–x) as the model system to decouple these effects. Combined experimental characterizations and density functional theory (DFT) calculations reveal that Ov can exclusively promote the LOM mechanism, while Ru dopants minimally alter the catalytic pathway. The incorporation of Ru enables the electron redistribution within the lattice of Ru–Co3O4–x, enhancing the adsorption of key reaction intermediates, thereby lowering the reaction energy barriers. The electron localization at Ru sites is also responsible for improved stability in harsh conditions. As a result, Ru–Co3O4–x delivers a relatively low overpotential of 198 mV at 10 mA cm–2 and is capable of operating stably for more than 220 h. Our findings not only underscore the synergistic effects of Ru doping and Ov incorporation in enhancing acidic OER performance but also decouple the effects of Ru sites and oxygen vacancies on the mechanism regulation, providing valuable guidance for designing and optimizing high-performance acidic OER catalysts.
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