Spatial construction of ultrasmall Pt-decorated 3D spinel oxidemodified N-doped graphene nanoarchitectures as high-efficiency methanol oxidation electrocatalysts  

作　　者：Qi Zhang Min-Min Yan Wen-Fa Du Chen-Yu Yin Jian Zhang Lu Yang Yun-Qing Kang Hai-Yan He Hua-Jie Huang 

机构地区：[1]College of Mechanics and Materials,Hohai University,Nanjing 210098,China [2]New Energy Technology Engineering Lab of Jiangsu Province,College of Science,Nanjing University of Posts&Telecommunications(NUPT),Nanjing 210023,China [3]International Center for Materials Nanoarchitectonics(WPIMANA),National Institute for Materials Science,Tsukuba 305-0044,Ibaraki,Japan

出　　处：《Rare Metals》2024年第1期186-197,共12页稀有金属（英文版）

基　　金：financially supported by the National Natural Science Foundation of China (Nos.22209037 and 51802077);the Fundamental Research Funds for the Central Universities (No.B220202042)。

摘　　要：Direct methanol fuel cell technology recently becomes the focus of both academic and engineering circles,which stimulates the exploitation and utilization of advanced electrode catalysts with high activity and long lifespan.Herein,we demonstrate a robust bottom-up approach to the spatial construction of three-dimensional(3D) spinel manganese-cobalt oxide-modified N-doped graphene nanoarchitectures decorated with ultrasmall Pt nanoparticles(Pt/MnCo_(2)O_(4)-NG) via a controllable selfassembly process.The incorporation of MnCo_(2)O_(4)nanocrystals provides abundant hydroxyl sources to promote the oxidative removal of CO-like byproducts on Pt sites,while the existence of 3D porous N-doped graphene networks facilitates the transportation of both ions and electrons in the hybrid system,thus giving rise to remarkable synergetic coupling effects during the methanol oxidation process.Consequently,the optimized Pt/MnCo_(2)O_(4)-NG nano architecture expres ses exceptional electrocatalytic properties with a large electrochemically active surface area of 99.5 m^(2)·g^(-1),a high mass activity of1508.3 mA·mg^(-1),strong toxicity resistance and reliable long-term durability,which have obvious competitive advantages over those of conventional Pt/carbon black,Pt/carbon nano tube,Pt/graphene,and Pt/N-doped graphene catalysts with the same Pt usage.

关 键 词：PLATINUM MnCo_(2)O_(4) 3D graphene ELECTROCATALYSTS Methanol oxidation 

分 类 号：TB383.1[一般工业技术—材料科学与工程] TQ426[化学工程] TM911.4[电气工程—电力电子与电力传动]