Ru⁃doped Co_(3)O_(4)/reduced graphene oxide:Preparation and electrocatalytic oxygen evolution property  

Ru掺杂Co_(3)O_(4)/氧化还原石墨烯的制备及其电催化析氧性能

作　　者：TIAN Tian ZHOU Meng WEI Jiale LIU Yize MO Yifan YE Yuhan JIA Wenzhi HE Bin 田甜;周萌;魏佳乐;刘一泽;莫忆凡;叶雨涵;贾文志;何斌(湖州师范学院工学院,湖州市环境功能材料与污染治理重点实验室,湖州313000)

机构地区：[1]Huzhou Key Laboratory of Environmental Functional Materials and Pollution Control,School of Engineering,Huzhou University,Huzhou,Zhejiang 313000,China

出　　处：《无机化学学报》2025年第2期385-394,共10页Chinese Journal of Inorganic Chemistry

基　　金：国家自然科学基金(No.21603069);浙江省自然科学基金(No.LQ24E040002);湖州市自然科学基金(No.2023YZ18);湖州师范学院人才科研启动资金(No.RK33047)资助。

摘　　要：Binary composites(ZIF-67/rGO)were synthesized by one-step precipitation method using cobalt nitrate hexahydrate as metal source,2-methylimidazole as organic ligand,and reduced graphene oxide(rGO)as carbon carrier.Then Ru3+was introduced for ion exchange,and the porous Ru-doped Co_(3)O_(4)/rGO(Ru-Co_(3)O_(4)/rGO)composite electrocatalyst was prepared by annealing.The phase structure,morphology,and valence state of the catalyst were analyzed by X-ray powder diffraction(XRD),scanning electron microscope(SEM),transmission electron microscopy(TEM),and X-ray photoelectron spectroscopy(XPS).In 1 mol·L^(-1)KOH,the oxygen evolution reaction(OER)performance of the catalyst was measured by linear sweep voltammetry,cyclic voltammetry,and chronoamperometry.The results show that the combination of Ru doping and rGO provides a fast channel for collaborative electron transfer.At the same time,rGO as a carbon carrier can improve the electrical conductivity of Ru-Co_(3)O_(4)particles,and the uniformly dispersed nanoparticles enable the reactants to diffuse freely on the catalyst.The results showed that the electrochemical performance of Ru-Co_(3)O_(4)/rGO was much better than that of Co_(3)O_(4)/rGO,and the overpotential of Ru-Co_(3)O_(4)/rGO was 363.5 mV at the current density of 50 mA·cm^(-2).以六水合硝酸钴为金属源,二甲基咪唑为有机配体,氧化还原石墨烯(rGO)为碳载体,采用一步沉淀法合成二元复合材料ZIF-67/rGO,然后再引入Ru3+进行离子交换,经过退火制备了多孔Ru掺杂Co_(3)O_(4)/rGO(Ru-Co_(3)O_(4)/rGO)复合电催化剂。进一步采用X射线粉末衍射(XRD)、扫描电子显微镜(SEM)、透射电子显微镜(TEM)和X射线光电子能谱(XPS)等表征手段对催化剂的物相结构、形貌以及元素价态进行分析。以1mol·L^(-1)KOH为电解质,利用线性扫描伏安法、循环伏安法和计时电流法对催化剂的析氧反应(OER)性能进行测试。结果表明,Ru的掺杂和rGO的结合为协同电子转移提供了快速通道。同时,rGO作为碳载体能够提高Ru-Co_(3)O_(4)颗粒的导电性,而且均匀分散的纳米颗粒使反应物可在催化剂上自由扩散。结果表明,Ru-Co_(3)O_(4)/rGO的电化学性能远优于Co_(3)O_(4)/rGO,其在50mA·cm^(-2)的电流密度下过电位为363.5mV。

关 键 词：metal-organic framework GRAPHENE ELECTROCATALYST oxygen evolution reaction 

分 类 号：O614.81[理学—无机化学]