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用修饰的高变层双氧化物,通过d频段中心调制来增强电催化氧的进化

Xingjie Cheng¹, Hong Li¹, Jinchen Fan^1,2

¹School of Materials and Chemistry, University of Shanghai for Science and Technology, Shanghai, 200093, P. R. China.

|April 7, 2025

概括

这项研究通过将合到高层双氧化物中来增强氧气演化反应的电催化剂. 这种修改优化了性能和稳定性,以实现高效的水分.

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:

为氧化演化反应 (OER) 开发具有成本效益和高性能的电催化剂对于水分裂至关重要.
高层双氧化物 (HE-LDHs) 由于多金属协同作用而具有潜力,但在电子和表面特性方面面临局限性.

研究的目的:

通过加入 (P) 原子来提高HE-LDH的OER性能和稳定性.
优化氧气中间吸附,降低OER中速率决定步骤的能量障碍.
开发一种新的策略来设计高效的水分催化剂.

主要方法:

使用水热和低温化合成P修饰的FeNiCoCuZn LDH (P-FeNiCoCuZn LDH).
理论和实验研究,以了解的作用.
现场拉曼光谱法用于在OER期间识别活跃物种.

主要成果:

P-FeNiCoCuZn LDH 呈现酸离子间隙和表面金属化物.
酸离子提高导电性和稳定性;表面P原子优化电子结构,特别是对于Ni和Fe站点.
在100mA cm-2和100小时稳定性下达到290mV的低超电位,在1M KOH下达到100小时稳定性.
通过现场拉曼光谱在OER期间识别了高度活跃的Ni(Fe) OOH物种.

结论:

在现场用进行异原子改造是设计高效的HE-LDH电催化剂的可行策略.
这种方法显著提高了OER活动和稳定性,促进了高材料在电催化中的应用.
该研究提供了对优化催化剂设计的见解,用于水分裂应用.

关键词:

在 d-band 中心.高性催化剂的催化剂金属化物金属化物氧气进化反应反应氧气进化反应

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