Copper-doped nickel–iron metal/metal oxide electrode with improved performance by promoting synergistic effects in the oxygen evolution reaction

IF 6.7 2区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Materials Today Chemistry Pub Date : 2024-08-01 DOI:10.1016/j.mtchem.2024.102225

Xiaoyu Gong, Jiawei Ge, Jun Qi, Honghe Ding, Leijie Zhang, Peiyu Ma, Zuohuan Chen, Nian Zhang, Jilong Xu, Lijuan Zhu, Jiaxiang Lu, Guiqiang Li, Junjie Ge, Yifan Ye

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引用次数: 0

Abstract

Advancing the performance of NiFe catalytic systems for oxygen evolution reaction (OER) is challenging, notably upon incorporating a third transition metal to create a trimetallic configuration. This study introduces a Cu-doped NiFe electrocatalyst, synthesized via a streamlined redeposition technique. The catalyst exhibits a Tafel slope of 38 mV dec and a low overpotential of 248 mV at a current density of 100 mA cm, plus a 2.5-fold boost in intrinsic activity. Density Functional Theory (DFT) and spectroscopic analyses demonstrate that Cu doping refines the electronic structure, enhancing charge density around the Fermi level and multiplying active OER sites. The Cu1Fe6Ni18 catalyst features robust Cu–O and Fe–O bond interactions, enhancing charge transport and OER kinetics. Our research elucidates the synergistic effects of Cu and Fe in a trimetallic system, offering an impactful approach to elevate trimetallic catalyst performance.

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掺铜镍铁金属/金属氧化物电极通过促进氧进化反应中的协同效应提高性能

提高镍铁催化系统在氧进化反应（OER）中的性能具有挑战性，尤其是在加入第三种过渡金属以形成三金属构型时。本研究介绍了一种铜掺杂的镍铁合金电催化剂，它是通过简化的再沉积技术合成的。该催化剂的塔菲尔斜率为 38 mV dec，电流密度为 100 mA cm 时过电位低至 248 mV，而且内在活性提高了 2.5 倍。密度泛函理论（DFT）和光谱分析表明，掺杂铜可改善电子结构，提高费米级附近的电荷密度，并使活性 OER 位点成倍增加。Cu1Fe6Ni18 催化剂具有强大的 Cu-O 和 Fe-O 键相互作用，增强了电荷传输和 OER 动力学。我们的研究阐明了铜和铁在三金属体系中的协同效应，为提高三金属催化剂性能提供了一种有影响力的方法。

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来源期刊

Materials Today Chemistry Multiple-

CiteScore

8.90

自引率

6.80%

发文量

596

审稿时长

33 days

期刊介绍： Materials Today Chemistry is a multi-disciplinary journal dedicated to all facets of materials chemistry. This field represents one of the fastest-growing areas of science, involving the application of chemistry-based techniques to the study of materials. It encompasses materials synthesis and behavior, as well as the intricate relationships between material structure and properties at the atomic and molecular scale. Materials Today Chemistry serves as a high-impact platform for discussing research that propels the field forward through groundbreaking discoveries and innovative techniques.