典型文献
Accelerated intermediate conversion through nickel doping into mesoporous Co-N/C nanopolyhedron for efficient ORR
文献摘要：
Engineering non-precious metals into nitrogen-doped carbon is employed to improve electrocatalyst activity towards oxygen reduction reaction(ORR).A nickel-doped Co-N/C mesoporous nanopolyhedron is successfully evoluted from a Ni-doped ZIF-67 precursor.The Ni&Co synergistic N/C catalyst exhibits a half-wave potential of 0.895 V(vs.reversible hydrogen electrode(RHE))with a diffusion-limiting cur-rent density of 6.1 mA cm-2 for alkaline ORR at 1600 r min-1,which is competitive to commercial Pt/C in terms of cost,methanol tolerance,and long-term stability.In situ surface-enhanced Raman scattering(SERS)study reveals the formation and fast conversion of superoxide ion(O2-)intermediate on the cata-lyst surface.Density functional theory(DFT)calculations demonstrate the decrease of energy barrier for potential-determining step(O*protonation)by Co-Ni synergy as well as the reduction of adsorption energy on catalyst surface upon nickel doping.The joint results of in situ SERS study and DFT calculations suggest a favourable ORR process on nickel-doped Co-N/C.
文献关键词：
中图分类号：
作者姓名：
Jianxin Mao;Peng Liu;Jiawen Li;Jianyue Yan;Shen Ye;Wenbo Song
作者机构：
College of Chemistry,Jilin University,Changchun 130012,Jilin,China;Department of Chemistry,Graduate School of Science,Tohoku University,Sendai 980-8577,Japan
文献出处：
引用格式：
[1]Jianxin Mao;Peng Liu;Jiawen Li;Jianyue Yan;Shen Ye;Wenbo Song-.Accelerated intermediate conversion through nickel doping into mesoporous Co-N/C nanopolyhedron for efficient ORR)[J].能源化学,2022(10):240-247
A类：
nanopolyhedron,evoluted
B类：
Accelerated,intermediate,conversion,through,nickel,doping,into,mesoporous,Co,efficient,ORR,Engineering,precious,metals,nitrogen,doped,carbon,employed,improve,electrocatalyst,activity,towards,oxygen,reduction,reaction,successfully,from,ZIF,precursor,synergistic,exhibits,half,wave,potential,reversible,hydrogen,electrode,RHE,diffusion,limiting,rent,density,mA,alkaline,which,competitive,commercial,Pt,terms,cost,methanol,tolerance,long,stability,In,situ,surface,enhanced,Raman,scattering,SERS,study,reveals,formation,fast,superoxide,O2,Density,functional,theory,DFT,calculations,demonstrate,decrease,energy,barrier,determining,step,protonation,by,synergy,well,adsorption,upon,joint,results,suggest,favourable,process
AB值：
0.583885
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