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Updated: Jul 9, 2025

Bulk and Thin Film Synthesis of Compositionally Variant Entropy-stabilized Oxides

Bulk and Thin Film Synthesis of Compositionally Variant Entropy-stabilized Oxides

Published on: May 29, 2018

空洞结构和多面体形状的高透氧化物向高度活跃和强大的氧气进化反应在完整的pH范围

Kanghua Miao¹, Wendan Jiang¹, Zhaoqian Chen¹

¹New Energy Research Institute, School of Environment and Energy, South China University of Technology, Higher Education Mega Center, 382 East Waihuan Road, Guangzhou, 510006, China.

Advanced materials (Deerfield Beach, Fla.)

|December 4, 2023

概括

研究人员开发了一种新的方法来合成空心高氧化金属 (HEO) 催化剂. 这些先进的HEO催化剂在广泛的pH范围内表现出氧气演化反应的特殊活性和稳定性.

科学领域:

材料科学材料科学材料科学
催化剂是一种催化剂.
电化学电化学电化学

背景情况:

高性金属氧化物 (HEO) 对催化反应具有前景.
由于复杂的前体,合成具有多个元素的空心结构HEOs具有挑战性.
空洞结构提供了诸如大表面积和高效的质量转移等优势.

研究的目的:

开发一种可控合成方法,用于具有多个金属元素的空心结构HEO催化剂.
调查这些新型HEOs对于氧化演化反应 (OER) 的催化性能.
使用DFT计算来理解结构-活动关系.

主要方法:

金属有机框架 (MOF) 模板合成.
离子交换法用于结合多种金属元素.
对OER性能进行电化学表征 (超电位,Tafel斜率).
密度函数理论 (DFT) 的计算.

主要成果:

成功合成了多面体形状的空心HEO催化剂,其中含有多达十种金属元素.
ZnFeNiCuCoRu-O HEO催化剂在整个pH范围内对OER表现出极好的活性和稳定性.
实现了低超电位 (170 mV 在10 mA cm−2) 和Tafel斜率 (56 mV dec−1).
在性,酸性和中性介质中在30小时内表现出显著的稳定性和最小的活动衰变.
DFT的计算显示,在独特的空洞结构中的Ru-Fe桥站点上,能量屏障较低.

结论:

离子交换方法对于制备高度稳定和活跃的空心结构HEO催化剂是有效的.
这些新型催化剂对高效的能量转换和储存设备有希望.
独特的空洞结构和组成提高了OER的性能.

关键词:

电催化剂是一种电催化剂.高氧化物高氧化物结构中空的结构是空洞的.模板导向合成的模板导向合成

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