现代化工

现代化工 ›› 2021, Vol. 41 ›› Issue (3) : 202-206,210. DOI: 10.16606/j.cnki.issn0253-4320.2021.03.040

科研与开发

异质结构Co₃O₄@CoMoO₄阵列的制备与析氧性能研究

孙志裕, 黄小琴, 刘国强

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Preparation of heterostructured Co₃O₄@CoMoO₄ arrays and their oxygen evolution property

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Received		Published
2020-04-30		2021-03-20
Issue Date	Revised Date
2021-03-13	2020-04-30

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摘要

采用简单的两步水热法和退火处理在泡沫镍上制备出异质结构Co₃O₄@CoMoO₄阵列（Co₃O₄@CoMoO₄/NF）。结果表明，Co₃O₄@CoMoO₄/NF比Co₃O₄/NF拥有更大的活性面积和更优异的电催化析氧性能，主要是由于其3D异质结构和协同作用。Co₃O₄@CoMoO₄纳米阵列在1 mol/L KOH溶液中和50 mA/cm²电流密度下的析氧过电位仅为253 mV，塔菲尔斜率为59 mV/dec，并且表现出优异的析氧稳定性。

Abstract

A simple two-step hydrothermal method and annealing process are used to prepare heterostructured Co₃O₄@CoMoO₄ arrays on nickel foam.Thanks to its 3D heterostructure and synergy effect,Co₃O₄@CoMoO₄ has a higher specific surface area and better electrocatalytic oxygen evolution performance than Co₃O₄/NF.The as-prepared Co₃O₄@CoMoO₄/NF presents excellent oxygen evolution stability,achieving a low overpotential of 253 mV at 50 mA cm^-2 with a Tafel slope of 64 mV dec^-1 in 1 M KOH solution.Therefore it has good application prospects as catalysts for oxygen evolution reaction.