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華中科技大學學報(自然科學版) 2020, Vol. 48 Issue (10): 57-62 DOI10.13245/j.hust.201010

欄目:機械與材料工程
Co3O4/β-MnO2/C納米復合材料的ORR性能研究
魏明銳 , 黃 碩 , 劉毅輝
武漢理工大學 a.現代汽車零部件技術湖北省重點實驗室;b.汽車零部件技術湖北省協同創新中心湖北 武漢 430070
摘要 分別以液相沉淀法、水熱法制備Co3O4和β-MnO2,并用超聲法制備復合材料Co3O4/β-MnO2/C,將其作為燃料電池陰極催化劑,在三電極體系下研究其催化氧還原反應(ORR)的性能.制備過程中形成了Co3O4納米顆粒和β-MnO2納米棒,在Co3O4/β-MnO2/C中,Co3O4附著在β-MnO2上.采用循環伏安測試(CV)和線性掃描伏安測試(LSV)研究了所制備復合材料的電化學性能,結果表明:由于Co3O4與β-MnO2的協同效應,因此Co3O4/β-MnO2/C在堿性體系中具有良好的催化活性,起始電位達0.88 V、半波電位為0.77 V,極限電流密度為52.4 A·m-2,催化過程以4電子反應為主.
關鍵詞 燃料電池 ;納米復合材料 ;活性位點 ;電催化劑 ;氧還原反應
Study on ORR properties of Co3O4/β-MnO2/C nanocomposites
WEI Mingrui , HUANG Shuo , LIU Yihui
a.Hubei Key Laboratory of Advanced Technology for Automotive Components;b.Hubei Collaborative Innovation Center for Automotive Components TechnologyWuhan University of Technology,Wuhan 430070,China
Abstract Co3O4 and β-MnO2 were prepared by liquid precipitation method and hydrothermal method respectively,and the composite material Co3O4/β-MnO2/C was prepared by ultrasonic method.The composite catalyst Co3O4/β-MnO2/C was used as the cathode catalyst of fuel cell,and its catalytic oxygen reduction reaction (ORR) was studied under three-electrode system.Co3O4 nanoparticles and β-MnO2 nanorods were formed during the preparation.In Co3O4/β-MnO2/C,some Co3O4 adhered to β-MnO2.The electrochemical properties of the prepared composites were investigated by cyclic voltammetry (CV) and linear sweep voltammetry (LSV).Results show that Co3O4/β-MnO2/C has good catalytic activity in alkaline system due to the synergistic effect of Co3O4 and β-MnO2.The initial potential is 0.88 V,the half-wave potential is 0.77 V,and the limiting current density is 52.4 A· m-2.The catalytic process is dominated by 4 electron reactions.
Keywords fuel cell ; nanocomposite ; active site ; electrocatalyst ; oxygen reduction reaction
基金資助教育部高等學校學科創新引智計劃資助項目(B17034);武漢理工大學研究生優秀學位論文培育項目(2018-YS-031)

中圖分類號TM53;TQ127.11
文獻標志碼A
文章編號1671-4512(2020)10-0057-06
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文獻來源
魏明銳, 黃 碩, 劉毅輝. Co3O4/β-MnO2/C納米復合材料的ORR性能研究[J]. 華中科技大學學報(自然科學版), 2020, 48(10): 57-62
DOI:10.13245/j.hust.201010
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