电催化析氧的高效CoSe2-Co3O4-Ag杂化催化剂

IF 1.2 4区材料科学 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY

Functional Materials Letters Pub Date : 2023-10-31 DOI:10.1142/s1793604723400337

Qichen Liang, Nana Du, Huajie Xu

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引用次数: 0

摘要

开发廉价、高活性、稳定的析氧反应(OER)催化剂对储能技术具有重要意义。本文用简单的方法合成了具有较强电化学性能的花状CoSe 2 - co_3 _4 -Ag。CoSe 2 - co_3 _4 -Ag表现出较低的过电位和较高的电流密度，在电流密度为10 mA⋅cm时，过电位为324 mV[公式:见文]，Tafel斜率为65.69 mA⋅dec[公式:见文]。从ECSA归一化LSV曲线来看，OER电催化活性的提高主要是由于ESCA和电导率的增加，电子构型的调整作用较小。这些提高电化学活性面积和电导率的策略对设计廉价、高活性、稳定的催化剂具有重要的参考价值。

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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An Efficient CoSe₂-Co₃O₄-Ag Hybrid Catalyst for Electrocatalytic Oxygen Evolution

The development of cheap, high activity and stability catalysts for oxygen evolution reaction (OER) is of great significance because of its important role in energy storage technology. Herein, flower-like CoSe 2 -Co 3 O 4 -Ag with enhanced electrochemical performance was synthesized by simple methods. The CoSe 2 -Co 3 O 4 -Ag exhibits lower overpotential and higher current density, with an overpotential of 324 mV at the current density of 10 mA⋅cm[Formula: see text] and a Tafel slope of 65.69 mA⋅dec[Formula: see text]. From the ECSA normalized LSV curves, higher electrocatalytic activity for OER is mainly due to the increase of ESCA and conductivity, minor due to adjusting the electronic configuration. These strategies to improve electrochemical active area and conductivity have valuable reference for designing cheap, high activity and stability catalysts.

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来源期刊

Functional Materials Letters 工程技术-材料科学：综合

CiteScore

2.40

自引率

7.70%

发文量

审稿时长

1.9 months

期刊介绍： Functional Materials Letters is an international peer-reviewed scientific journal for original contributions to research on the synthesis, behavior and characterization of functional materials. The journal seeks to provide a rapid forum for the communication of novel research of high quality and with an interdisciplinary flavor. The journal is an ideal forum for communication amongst materials scientists and engineers, chemists and chemical engineers, and physicists in the dynamic fields associated with functional materials. Functional materials are designed to make use of their natural or engineered functionalities to respond to changes in electrical and magnetic fields, physical and chemical environment, etc. These design considerations are fundamentally different to those relevant for structural materials and are the focus of this journal. Functional materials play an increasingly important role in the development of the field of materials science and engineering. The scope of the journal covers theoretical and experimental studies of functional materials, characterization and new applications-related research on functional materials in macro-, micro- and nano-scale science and engineering. Among the topics covered are ferroelectric, multiferroic, ferromagnetic, magneto-optical, optoelectric, thermoelectric, energy conversion and energy storage, sustainable energy and shape memory materials.