Strained-Induced Morphological Reconstruction of RuO2(110) Thin-Film Electrocatalysts.

IF 15.6 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Journal of the American Chemical Society Pub Date : 2025-10-05 DOI:10.1021/jacs.5c08607

Jacob Som,Austin J Reese,Luka Mitrovic,R Soyoung Kim,Shay McBride,Swapnil S Nalawade,Shyam Aravamudhan,Geoffroy Hautier,Junko Yano,Darrell G Schlom,Jin Suntivich

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Abstract

Strain is a widely used strategy for electrocatalyst engineering. Overstraining, however, can lead to unintentional materials transformation. We investigate the impact of strain on the surface morphology of a rutile RuO2(110) film grown on a symmetry-matching rutile TiO2(110) substrate. When the film thickness exceeds 9 nm, the RuO2 surface relaxes by forming step edges that expose the {011} plane. Density functional theory (DFT) calculation shows that the (011) facet is among the lower energy surfaces of rutile RuO2, suggesting that this formation incurs minimal energetic penalties. In situ atomic force microscopy (AFM) shows that the film maintains the (110) structure of the terrace during electrochemistry. Inductively coupled plasma-mass spectrometry (ICP-MS) further reveals the insensitivity of the Ru dissolution to strain. Our findings show a strain-relieving pathway via surface reconstruction in RuO2(110) and provide an example of a strain-relieving mechanism that does not affect dissolution.

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RuO2（110）薄膜电催化剂的应变诱导形态重构。

应变是电催化剂工程中广泛使用的策略。然而，过度拉伸会导致无意的材料变形。我们研究了应变对在对称匹配的金红石TiO2（110）衬底上生长的金红石RuO2（110）薄膜表面形貌的影响。当膜厚超过9 nm时，RuO2表面形成台阶边松弛，暴露出{011}平面。密度泛函理论（DFT）计算表明，（011）面是金红石RuO2的低能量面之一，表明该结构产生的能量惩罚最小。原位原子力显微镜（AFM）显示，在电化学过程中，薄膜保持了平台的（110）结构。电感耦合等离子体质谱（ICP-MS）进一步揭示了Ru溶出对应变的不敏感性。我们的发现显示了一种通过RuO2（110）表面重构的应变释放途径，并提供了一种不影响溶解的应变释放机制的例子。

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

Journal of the American Chemical Society 化学-化学综合

CiteScore

24.40

自引率

6.00%

发文量

2398

审稿时长

1.6 months

期刊介绍： The flagship journal of the American Chemical Society, known as the Journal of the American Chemical Society (JACS), has been a prestigious publication since its establishment in 1879. It holds a preeminent position in the field of chemistry and related interdisciplinary sciences. JACS is committed to disseminating cutting-edge research papers, covering a wide range of topics, and encompasses approximately 19,000 pages of Articles, Communications, and Perspectives annually. With a weekly publication frequency, JACS plays a vital role in advancing the field of chemistry by providing essential research.