通过可控Co诱导重构RuCo合金电催化剂减轻酸性OER中不可逆Ru溶解

IF 18.5 1区材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Advanced Functional Materials Pub Date : 2025-07-13 DOI:10.1002/adfm.202509656

Zhiqi Jiang, Li Shao, Yuhan Sun, Yan Dong, Xuerong Zheng, Tongzhou Wang, Jihong Li, Huaiyu Shao, Lifang Jiao, Yida Deng

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引用次数: 0

摘要

深入了解表面重构过程对于开发高效的析氧反应电催化剂至关重要。本文采用电化学分析与实验表征相结合的方法，利用RuCo合金纳米颗粒作为模型催化剂，对酸性OER过程中的表面过程及其对性能的影响进行了全面探索。有趣的是，在OER反应过程中，RuCo合金催化剂发生了表面动态重构，形成了新的超薄活性相CoRuOx (Ru掺杂Co3O4)，有效地防止了Ru的过氧化和溶解，从而提高了稳定性。此外，它还能促进水的吸附和解离，加速*OOH中间体的形成，促进吸附物演化机制（AEM）机制，显著提高催化活性。因此，与纯Ru颗粒和商用RuO2相比，RuCo合金催化剂表现出令人满意的性能，其过电位为210 mV，达到10 mA cm - 2，并且在120小时以上的稳定性得到改善。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Mitigating Irreversible Ru Dissolution in Acidic OER via Controlled Co‐Induced Reconstruction of RuCo Alloy Electrocatalysts

A deep understanding of the surface reconstruction process is essential for developing efficient electrocatalysts for oxygen evolution reaction (OER). Herein, a comprehensive exploration is conducted by utilizing RuCo alloy nanoparticles as a model catalyst to investigate the surface process during acidic OER and the impact on performance, through the combination of electrochemical analysis and experimental characterization. Interestingly, it is observed that the RuCo alloy catalyst undergoes surface dynamic reconstruction during the OER reaction, forming a new ultrathin active phase CoRuOx (Ru‐doped Co3O4), which effectively prevents Ru overoxidation and dissolution, thereby enhancing stability. Moreover, it can also facilitate water adsorption and dissociation, accelerate the formation of the *OOH intermediate, promote the adsorbate evolution mechanism (AEM) mechanism, and significantly improve the catalytic activity. Consequently, the RuCo alloy catalyst exhibits appealing performance compared to pure Ru particles and commercial RuO2, with an overpotential of 210 mV to reach 10 mA cm−2, and an improved stability for over 120 h.

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来源期刊

Advanced Functional Materials 工程技术-材料科学：综合

CiteScore

29.50

自引率

4.20%

发文量

2086

审稿时长

2.1 months

期刊介绍： Firmly established as a top-tier materials science journal, Advanced Functional Materials reports breakthrough research in all aspects of materials science, including nanotechnology, chemistry, physics, and biology every week. Advanced Functional Materials is known for its rapid and fair peer review, quality content, and high impact, making it the first choice of the international materials science community.