分散和征服

IF 42.8 1区化学 Q1 CHEMISTRY, PHYSICAL Nature Catalysis Pub Date : 2024-10-23 DOI:10.1038/s41929-024-01245-x

Marcal Capdevila-Cortada

引用次数: 0

摘要

研究人员首先在气体扩散层上沉积了平均尺寸为 1.7 纳米的 Ir 纳米粒子。在对可逆氢电极（VRHE）施加 0.2 V 的初始还原电势后，操作性 X 射线全散射与对分布函数（PDF）分析和小角 X 射线散射（SAXS）显示，金属铱纳米粒子呈现出十面体形状，具有面心立方和六方紧密堆积的结晶特征。将阳极电位提高到 1.1 VRHE 以上后，氧化铱开始形成，同时仍与金属铱共存，具有局部金红石氧化物特征，但缺乏长程有序性。这些局部金红石图案可延伸至 1 纳米，由边缘和角落连接的 [IrO6] 单元组成。在与 OER 相关的电流密度（如 1.5 VRHE）下，铱被完全氧化，但仍然缺乏长程晶序。氧化电位的增加导致 Ir-O 键长度收缩（X 射线吸收光谱也证实了这一点）以及原子迁移率的增加：J. Am.原始参考文献：J Am.https://doi.org/10.1021/jacs.4c08149 (2024)

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 Catalysis Chemical Engineering-Bioengineering

CiteScore

52.10

自引率

1.10%

发文量

140

期刊介绍： Nature Catalysis serves as a platform for researchers across chemistry and related fields, focusing on homogeneous catalysis, heterogeneous catalysis, and biocatalysts, encompassing both fundamental and applied studies. With a particular emphasis on advancing sustainable industries and processes, the journal provides comprehensive coverage of catalysis research, appealing to scientists, engineers, and researchers in academia and industry. Maintaining the high standards of the Nature brand, Nature Catalysis boasts a dedicated team of professional editors, rigorous peer-review processes, and swift publication times, ensuring editorial independence and quality. The journal publishes work spanning heterogeneous catalysis, homogeneous catalysis, and biocatalysis, covering areas such as catalytic synthesis, mechanisms, characterization, computational studies, nanoparticle catalysis, electrocatalysis, photocatalysis, environmental catalysis, asymmetric catalysis, and various forms of organocatalysis.

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