Synergistic effect of CoII, NiII and FeII/FeIII in trimetallic MOFs for enhancing electrocatalytic water oxidation†

IF 2.6 3区 化学 Q2 CHEMISTRY, MULTIDISCIPLINARY
CrystEngComm Pub Date : 2024-11-04 DOI:10.1039/D4CE00953C
Yaling Wu, Zhaopeng Sun, Lingmeng Yu, Yingying Chen, Zhibo Li, Mengli Li, Dan Liu, Zheng Yan and Xuebo Cao
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引用次数: 0

Abstract

Metal–organic frameworks (MOFs) can catalyze the oxygen evolution reaction (OER) process. Despite the established link between pristine MOFs and electrocatalysts, a number of limitations still hamper the understanding of the key factors that determine OER performance. In this paper, taking the ideal Co-MOF model as the structural basis (this MOF contains unsaturated coordinated metal centers and one-dimensional metal chains), nickel ions and/or iron ions are introduced to obtain isostructural bimetallic and trimetallic MOFs. Furthermore, the valence state of the iron element in the trimetallic MOF is regulated to improve the OER performance. The electrochemical performance test results confirm that the trimetallic (Co1Ni1)2Fe1(II)-MOF regulated by valence state shows excellent catalytic performance in the OER, which is superior to monometallic and bimetallic MOFs. Its enhanced catalytic performance can be attributed to the synergistic interactions between unsaturated Co, Ni and Fe sites as well as the faster charge transfer ability of the FeII/FeIII mixed-phase system, which facilitates the optimization of the adsorption and activation processes of the reactants/intermediates. This exploration provides a new perspective for further studying the structure–performance relationship of metal–organic framework materials and developing more efficient OER catalysts.

Abstract Image

三金属 MOFs 中 CoII、NiII 和 FeII/FeIII 的协同效应可增强电催化水氧化能力†。
金属有机框架(MOFs)可以催化氧进化反应(OER)过程。尽管原始 MOF 与电催化剂之间已建立了联系,但一些限制因素仍阻碍着人们对决定 OER 性能的关键因素的了解。本文以理想的 Co-MOF 模型为结构基础(这种 MOF 包含不饱和配位金属中心和一维金属链),引入镍离子和/或铁离子,从而获得等结构的双金属和三金属 MOF。此外,还调节了三金属 MOF 中铁元素的价态,以提高 OER 性能。电化学性能测试结果证实,通过价态调节的三金属(Co1Ni1)2Fe1(II)-MOF 在 OER 中表现出优异的催化性能,优于单金属和双金属 MOF。其催化性能的提高可归因于不饱和 Co、Ni 和 Fe 位点之间的协同作用以及 FeII/FeIII 混相体系更快的电荷转移能力,这有利于优化反应物/中间体的吸附和活化过程。这一探索为进一步研究金属有机框架材料的结构-性能关系和开发更高效的 OER 催化剂提供了新的视角。
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
CrystEngComm
CrystEngComm 化学-化学综合
CiteScore
5.50
自引率
9.70%
发文量
747
审稿时长
1.7 months
期刊介绍: Design and understanding of solid-state and crystalline materials
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