三维阵列CoO_(x)/CeO_(2)双功能催化剂的制备及其电解水性能研究  

Preparation of Three-Dimensional Array CoO_(x)/CeO_(2) Bifunctional Catalyst and Its Performance in Water Electrolysis

作　　者：邓越 王婷婷 孙清鹏 孙金峰 张少飞 DENG Yue;WANG Tingting;SUN Qingpeng;SUN Jinfeng;ZHANG Shaofei(School of Materials Science and Engineering,Hebei University of Science and Technology,Shijiazhuang 050018,China)

机构地区：[1]河北科技大学材料科学与工程学院,河北石家庄050018

出　　处：《铜业工程》2025年第1期95-103,共9页Copper Engineering

基　　金：国家自然科学基金项目(52101251);河北省高等学校青年拔尖人才项目(BJK2023058)资助。

摘　　要：开发高效、稳定、低成本的非贵金属基双功能电催化剂是实现水裂解制氢的关键。纳米阵列结构电催化剂由于结构上的优势,引起了人们的广泛关注。本文采用溶液燃烧法在泡沫镍(NF)上原位生长三维纳米片阵列的CoO_(x)/CeO_(2)。结果表明,在CoO_(x)/CeO_(2)催化剂与导电泡沫镍基体的直接接触、Ce和Co之间的正协同效应下,开放的三维纳米片结构以及其无黏结剂的一体化R-CeCo/NF电极对析氢反应(HER)和析氧反应(OER)表现出优异的催化活性,HER和OER的过氧化电位在10 mA/cm^(2)时分别为48和267 mV。此外,该催化剂在100 mA/cm^(2)电解液中能稳定运行100 h,电流密度几乎不变。此项研究不仅说明了Co基电催化剂在水的电催化电解中具有巨大的应用潜力,而且为制备高效、稳定的Co基催化剂提供了一种可行的策略。Developing efficient,stable,and low-cost non-precious metal-based bifunctional electrocatalysts is crucial for hydrogen production through water electrolysis.Nanoarray structure electrocatalysts have attracted widespread attention due to their structural advantages.In this study,three-dimensional nano-sheet arrays of CoO_(x)/CeO_(2) were in situ grown on nickel foam(NF)using a solution combustion method.The results showed that CoO_(x)/CeO_(2) catalyst,in direct contact with the conductive nickel foam substrate,exhibited a positive synergistic effect between Ce and Co,an open three-dimensional nano-sheet structure,and excellent catalytic activity for both the hydrogen evolution reaction(HER)and the oxygen evolution reaction(OER),with overpotentials of only 48 and 267 mV at 10 mA/cm^(2),respectively.Furthermore,the catalyst could operate stably in an electrolyte at 100 mA/cm^(2) for 100 h with almost no change in current density.This work not only demonstrated the enormous application potential of Co-based electrocatalysts in water electrolysis but also provided a feasible strategy for preparing efficient and stable Co-based catalysts.

关 键 词：纳米片阵列结构 双功能催化剂 电解水 电子结构调节 

分 类 号：O633.36[理学—高分子化学]