改良介孔碳负载四氧化三钴纳米粒子的制备及阴极氧还原反应的电化学性能研究  

Preparation of modified mesoporous carbon supported cobalt tetroxide nanoparticle and study on its electrochemical properties for cathodic oxygen reduction reaction

作　　者：杜瑞成 王小玉 李燕 DU Rui-cheng;WANG Xiao-yu;LI Yan(School of Applied Chemical Engineering,Lanzhou Petrochemical University of Vocational Technology,Lanzhou 730060,China)

机构地区：[1]兰州石化职业技术大学应用化学工程学院,甘肃兰州730060

出　　处：《现代化工》2024年第9期187-194,共8页Modern Chemical Industry

基　　金：甘肃省教育厅教育科技创新科研项目(2022B-321)。

摘　　要：以六水硝酸钴为钴源、碳酸氢氨为沉淀剂、聚乙二醇为分散剂,采用浸渍法与改良后的无定形介孔碳制备Co_(3)O_(4)/C催化剂,利用XRD、SEM、BET和XPS和电化学手段对其成分、结构及电化学性能进行表征。结果表明,改良后的无定形介孔碳具有高比表面积和丰富的空隙,比表面积达977.33 m^(2)/g,能够使负载的Co_(3)O_(4)均匀分散,减少了氧还原反应期间Co_(3)O_(4)纳米颗粒团聚等问题。该催化剂应用在直接甲醇燃料电池的阴极上呈现出良好的氧还原催化活性和循环稳定性。Co_(3)O_(4)/C catalyst is synthesized via the impregnation method with cobalt nitrate hexahydrate as cobalt source,ammonia bicarbonate as precipitant,polyethylene glycol as dispersant,along with modified amorphous mesoporous carbon.The catalyst's composition,structure,and electrochemical properties are characterized by means of XRD,SEM,BET,XPS,and electrochemical method.Results indicate that the modified amorphous mesoporous carbon possesses a high specific surface area and an ample porosity,with a specific surface area as high as 977.33 m^(2)·g^(-1),which can make the supported Co_(3)O_(4) disperse uniformly,and reduce nanoparticle agglomeration during the oxygen reduction reaction.This catalyst exhibits good catalytic activity in oxygen reduction and cyclic stability when it is applied in the cathode of direct methanol fuel cells.

关 键 词：改良介孔碳 四氧化三钴 直接甲醇燃料电池 阴极催化剂 氧还原反应 

分 类 号：O643.36[理学—物理化学]