Oxygen Atom Migration Dominates Anomalous Reversible Oxidation of Ru Nanosheets

IF 16.1 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Angewandte Chemie International Edition Pub Date : 2025-03-31 DOI:10.1002/anie.202502927

Xiong Xiao, Yongli Shen, Wei Xi, Lin Gu, Xiaogang Li, Baojuan Xi, Shenglin Xiong, Changhua An

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引用次数: 0

Abstract

Oxidation is a ubiquitous reaction in nature. For most metals (especially metal nanoparticles), they will be completely oxidized under suitable conditions, except ruthenium (Ru). In this work, in‐situ transmission electron microscopy (in‐situ TEM) and ex‐situ spectroscopy were employed to investigate the oxidation process of Ru nanosheets. Ex‐situ spectroscopic analysis demonstrates the incomplete oxidation of Ru nanosheets to RuO₂, while the in‐situ TEM observations uncover an anomalous reverse phase transformation from the oxidized to metallic phase during oxidation. Combined with theoretical calculations, the oxygen atom migration dominates the reversible oxidation process, strikingly distinct from the unidirectional oxidation pathways in conventional metallic systems. The as‐generated abundant Ru‐RuO2 heterointerfaces formed through reversible oxidation provide a wealth of active sites for electrochemical alkaline hydrogen evolution reaction (HER). Herein, the study not only lays a foundation for the understanding complex dynamic oxidation processes, but also offers new insights into for the design of nanocatalysts.

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来源期刊

Angewandte Chemie International Edition 化学-化学综合

CiteScore

26.60

自引率

6.60%

发文量

3549

审稿时长

1.5 months

期刊介绍： Angewandte Chemie, a journal of the German Chemical Society (GDCh), maintains a leading position among scholarly journals in general chemistry with an impressive Impact Factor of 16.6 (2022 Journal Citation Reports, Clarivate, 2023). Published weekly in a reader-friendly format, it features new articles almost every day. Established in 1887, Angewandte Chemie is a prominent chemistry journal, offering a dynamic blend of Review-type articles, Highlights, Communications, and Research Articles on a weekly basis, making it unique in the field.