典型文献
The ORR electron transfer kinetics control via Co-Nx and graphitic N sites in cobalt single atom catalysts in alkaline and acidic media
文献摘要：
Cost-effective 3d transition metal(TM)based single atom catalysts(SACs)for oxygen reduction reac-tion(ORR)are potential alternatives for Pt-based electrocatalysts in fuel cells and metal-air batteries,Understanding the effects of SACs'properties and active site composition on the catalytic performance is significant to construct highly efficient catalysts.Here,we successfully promote the activity of cobalt single atoms decorated on N-doped carbon nanosheets via tuning the content of different nitrogen components,which outperforms most reported cobalt SACs.The activity and kinetics show positive correlation trends with the content of Co-Nx and graphitic N,serving as the main active sites.Furthermore,ORR kinetics in alkaline media can be positively affected by the conductivity of catalysts while no similar relation is observed in acidic media.The slight loss of Co-Nx sites engenders a mild change of performance in alkaline media,while the decrease of Co-Nx site activity due to chemical oxi-dation of carbon support and the loss of Co-Nx sites in acidic media exacerbate the degradation of per-formance.Our work provides an insight into the relation between ORR electron transfer kinetics and active sites in 3d TM based SACs.
文献关键词：
中图分类号：
作者姓名：
Tong Shen;Xiaoxiao Huang;Shibo Xi;Wei Li;Shengnan Sun;Yanglong Hou
作者机构：
Beijing Innovation Centre for Engineering Science and Advanced Technology(BIC-ESAT),Beijing Key Laboratory for Magnetoelectric Materials and Devices(BKLMMD),School of Materials Science and Engineering,Peking University,Beijing 100081,China;Center for Nanoscale Science and Technology,Academy for Advanced Interdisciplinary Studies,Peking University,Beijing 100081,China;Institute of Chemical and Engineering Sciences,Agency for Science,Technology and Research(A*STAR),Singapore 627833,Singapore
文献出处：
引用格式：
[1]Tong Shen;Xiaoxiao Huang;Shibo Xi;Wei Li;Shengnan Sun;Yanglong Hou-.The ORR electron transfer kinetics control via Co-Nx and graphitic N sites in cobalt single atom catalysts in alkaline and acidic media)[J].能源化学,2022(05):184-194
A类：
engenders
B类：
ORR,electron,transfer,kinetics,control,via,Nx,graphitic,sites,cobalt,single,alkaline,acidic,media,Cost,effective,3d,transition,metal,TM,SACs,oxygen,reduction,reac,are,potential,alternatives,Pt,electrocatalysts,fuel,cells,air,batteries,Understanding,effects,properties,active,composition,catalytic,performance,is,significant,construct,highly,efficient,Here,successfully,promote,activity,atoms,decorated,doped,carbon,nanosheets,tuning,content,different,nitrogen,components,which,outperforms,most,reported,show,correlation,trends,serving,main,Furthermore,positively,affected,by,conductivity,while,similar,observed,slight,loss,mild,change,decrease,due,chemical,oxi,support,exacerbate,degradation,Our,work,provides,insight,into,between
AB值：
0.485526
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