典型文献
Bifunctional oxygen electrode cobalt-nickel sulfides catalysts originated from intercalated LDH precursors
文献摘要：
Bimetallic cobalt-nickel sulfide nanoparticles anchored on S-,N-codoped holey carbon nanosheets(CoNi-S-T@NCFs)with a hydrangea-like morphology,were synthesized via a confinement synthesis route,in which an intercalated LDH precursor was subjected to the interlayer-confined carbonization and host-layer sulfurization.The phase transformation and structure evolution(e.g.,atom site occupancy,crystallite size,and cell volume)of the CoNi-S-T@NCFs electrocatalysts,as a function of sulfurization tem-peratures,were confirmed by X-ray diffraction and Rietveld analyses.The sulfur vacancies effectively enhance the electrocatalytic activity,while the synergistic effect of(Co,Ni)7S8 alloy and S,N-codoped car-bon matrix facilitates the electron transfer and accelerates reaction kinetics,making CoNi-S-900@NCFs an efficient and stable bifunctional electrocatalyst for oxygen reduction reaction(ORR).The rich high-valence Co(ill)and Ni(Ⅲ)of CoNi-S-900@NCFs facilitates the in-situ transformation of the metal(oxy)hydroxides intermediates with high catalytic activity for oxygen evolution reaction(OER).Thus,with a bifunctional parameter,△E,of 0.75 V(Ej=10,OER-E1/2,oRR),this electrocatalyst slightly outperforms the state-of-the-art commercial Pt/C+Ru02/C catalyst(△E=0.76 V)in alkaline medium.This work demon-strates the influence that the sulfurization temperature has on the relationship between the structure and electrocatalytic performance of bimetallic sulfides prepared by the synthesis strategy using the interca-lated LDH precursor.This strategy can be extended to prepare other chalcogenides with binary or ternary transition metals.
文献关键词：
中图分类号：
作者姓名：
Xiaofei Gong;Haihong Zhong;Luis Alberto Estudillo-Wong;Nicolas Alonso-Vante;Yongjun Feng;Dianqing Li
作者机构：
State Key Laboratory of Chemical Resource Engineering,Beijing Engineering Center for Hierarchical Catalysts,College of Chemistry,Beijing University of Chemical Technology,Beijing 100029,China;Departamento de Sociedad y Política Ambiental,CIIEMAD,Instituto Politécnico Nacional,Calle 30 de junio de 1520,Alcaldía GAM,C.P.07340 CDMX,Mexico;IC2MP,UMR-CNRS 7285,University of Poitiers,F-86073 Poitiers Cedex,France
文献出处：
引用格式：
[1]Xiaofei Gong;Haihong Zhong;Luis Alberto Estudillo-Wong;Nicolas Alonso-Vante;Yongjun Feng;Dianqing Li-.Bifunctional oxygen electrode cobalt-nickel sulfides catalysts originated from intercalated LDH precursors)[J].能源化学,2022(11):376-386
A类：
NCFs,7S8,oRR,C+Ru02
B类：
Bifunctional,oxygen,electrode,cobalt,nickel,sulfides,originated,from,intercalated,LDH,precursors,Bimetallic,nanoparticles,anchored,codoped,holey,nanosheets,CoNi,hydrangea,like,morphology,were,synthesized,via,confinement,synthesis,route,which,was,subjected,interlayer,confined,carbonization,host,sulfurization,phase,transformation,structure,evolution,atom,site,occupancy,crystallite,cell,volume,electrocatalysts,peratures,confirmed,by,ray,diffraction,Rietveld,analyses,vacancies,effectively,enhance,electrocatalytic,activity,while,synergistic,alloy,matrix,facilitates,electron,transfer,accelerates,reaction,kinetics,making,efficient,stable,bifunctional,reduction,ORR,rich,high,valence,ill,situ,hydroxides,intermediates,OER,Thus,parameter,Ej,E1,this,slightly,outperforms,state,commercial,Pt,alkaline,medium,This,work,demon,strates,influence,that,temperature,relationship,between,performance,bimetallic,prepared,strategy,using,extended,other,chalcogenides,binary,ternary,transition,metals
AB值：
0.547273
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