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超晶格尼克间金属的诱导无形化,使得高效的氧演化反应成为可能

Ziliang Chen^1,2, Shouyu Yao¹, Jiaxin Xu¹

¹State Key Laboratory of Bioinspired Interfacial Materials Science, Institute of Functional Nano & Soft Materials (FUNSOM), Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices, Soochow University, Suzhou, Jiangsu, P. R. China.

Advanced science (Weinheim, Baden-Wurttemberg, Germany)

|February 25, 2026

概括

这项研究开发了一种诱导的无形化方法,以将晶体CeNi3间金属转化为无形结构,显著提高氧演化反应 (OER) 的性能和耐用性,用于电催化应用.

科学领域:

材料科学材料科学材料科学
电化学电化学电化学
催化剂是一种催化剂.

背景情况:

为了增强氧化演化反应 (OER),将有序的金属间化合物转化为无形形式是具有挑战性的.
CeNi3 间金属具有超晶格结构,可以作为无形化的目标.

研究的目的:

为CeNi3金属间介绍一种新的诱导无形化方法.
调查无形化对CeNi3.3性OER性能和耐久性的影响.

主要方法:

超晶格结构CeNi3.3的诱导的无形化.
对OER性能进行电化学表征 (超电位,电流密度,耐用性).
先进的表征技术:X射线吸收光谱,现场拉曼,现场DEMS,DFT计算.

主要成果:

通过处理成功实现了CeNi3的无形化,从而诱导了格子不匹配.
无形化的CeNi3表现出明显增强的OER活性,需要较低的过电位 (318 mV在100 mA cm-2).
该材料表现出极好的耐用性,在1.0MKOH下维持620mAcm-2200小时.

结论:

诱导的无形化有效地释放了CeNi3.3中优异的OER活性和稳定性.
表面重建导致Ce-doped NiOOH活性阶段,通过吸附物演化机制增强OER.
这种气态工程策略为设计先进的稀土过渡金属电催化剂提供了途径.

关键词:

变形无形化变形无形化它们是金属间金属.氧气进化反应反应氧气进化反应稀土金属是一种稀土金属.表面的重建表面的重建

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