Boosting and stabilizing oxygen evolution reaction through Ru single atoms anchored amorphous NiMoOx electrocatalyst.

IF 15.7 1区综合性期刊 Q1 MULTIDISCIPLINARY SCIENCES

Nature Communications Pub Date : 2025-10-03 DOI:10.1038/s41467-025-63870-9

Jiayi Li,Yiming Zhu,Changyuan Li,Qian Zhang,Ju Rong,Shasha Guo,Nicolas Alonso-Vante,Long Yang,Min-Hsin Yeh,Wei-Hsiang Huang,Xiaohua Yu,Hongfei Cheng,Jiwei Ma

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Abstract

Efficient and durable electrocatalysts for the oxygen evolution reaction (OER) are essential for advancing water splitting technologies, which enable sustainable hydrogen production. The integration of amorphous oxide supports with metal single atoms offers a promising strategy to precisely tuning the electronic structure and improving the exposure of active sites. Here, we report an amorphous NiMoOx support anchored with Ru single atoms (denoted as a-RNMO), which achieves a low cell voltage of 1.78 V at 1 A cm-2 and noteworthy durability in an anion exchange membrane water electrolyzer. Time-resolved operando Quick X-ray absorption spectroscopy reveals rapid Mo leaching followed by structural reconstruction, culminating in the NiOOH formation. Theoretical calculations suggest a likely "complementary amorphous-electronic" mechanism. It shows that the amorphous structure exposes more active sites and favors the adsorption of intermediates, while Ru single atoms finely modulate the electronic structure. These valuable insights highlight the design of high-performance OER electrocatalysts based on metal single atoms anchored on amorphous oxides.

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Ru单原子锚定非晶NiMoOx电催化剂促进和稳定析氧反应。

高效耐用的析氧反应（OER）电催化剂对于推进水分解技术至关重要，从而实现可持续的氢气生产。非晶氧化物载体与金属单原子的集成为精确调整电子结构和改善活性位点的暴露提供了一种有前途的策略。在这里，我们报道了一种以Ru单原子锚定的非晶NiMoOx支架（记为a- rnmo），该支架在1 a cm-2时达到了1.78 V的低电池电压，并且在阴离子交换膜水电解槽中具有显著的耐久性。时间分辨operando快速x射线吸收光谱显示快速Mo浸出，随后进行结构重建，最终形成NiOOH。理论计算表明一种可能的“互补非晶电子”机制。结果表明，非晶结构暴露出更多的活性位点，有利于中间体的吸附，而Ru单原子对电子结构有很好的调节作用。这些有价值的见解强调了基于金属单原子锚定在非晶氧化物上的高性能OER电催化剂的设计。

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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来源期刊

Nature Communications Biological Science Disciplines-

CiteScore

24.90

自引率

2.40%

发文量

6928

审稿时长

3.7 months

期刊介绍： Nature Communications, an open-access journal, publishes high-quality research spanning all areas of the natural sciences. Papers featured in the journal showcase significant advances relevant to specialists in each respective field. With a 2-year impact factor of 16.6 (2022) and a median time of 8 days from submission to the first editorial decision, Nature Communications is committed to rapid dissemination of research findings. As a multidisciplinary journal, it welcomes contributions from biological, health, physical, chemical, Earth, social, mathematical, applied, and engineering sciences, aiming to highlight important breakthroughs within each domain.