Fuel flexibility is one of the most distinguished advantages of solid oxide fuel cells(SOFCs)over other low-temperature fuel cells.Furthermore,the combination of ammonia fuel and SOFCs tech-nology should be a promising clean energy system after considering the high energy density,easy transportation/storage,matured synthesis technology and carbon-free nature of NH3 as well as high efficiency of SOFCs.However,the large-scale applications of direct-ammonia SOFCs(DA-SOFCs)are strongly limited by the inferior anti-sintering capability and catalytic activity for am-monia decomposition reaction of conventional nickel-based cermet anode.Herein,a slightly ruthe-nium(Ru)doping in perovskite oxides is proposed to promote the alloy nanoparticle exsolution,en-abling better DA-SOFCs with enhanced power outputs and operational stability.After treating Ru-doped Pr0.6Sr0.4Co0.2Fe0.75Ru0.05O3-δ single-phase perovskite in a reducing atmosphere,in addition to the forma-tion of two layered Ruddlesden-Popper perovskites and Pr2O3 nanoparticles(the same as the Ru-free counterpart,Pr0.6Sr0.4Co0.2Fe0.8O3-δ),the exsolution of CoFeRu-based alloy nanoparticles is remarkably promoted.Such reduced Pr0.6Sr0.4Co0.2Fe0.75Ru0.05O3-δ composite anode shows superior catalytic activity and stability for NH3 decomposition reaction as well as anti-sintering capability in DA-SOFCs to those of reduced Pr00.6Sr0.4Co0.2Fe0.8O3-δ due to the facilitated nanoparticle exsolution and stronger nanoparti-cle/substrate interaction.This work provides a facile and effective strategy to design highly active and durable anodes for DA-SOFCs,promoting large-scale applications of this technology.

Xiandong Xiong;Jian Yu;Xiaojian Huang;Dan Zou;Yufei Song;Meigui Xu;Ran Ran;Wei Wang;Wei Zhou;Zongping Shao

State Key Laboratory of Materials-Oriented Chemical Engineering,College of Chemical Engineering,Nanjing Tech University,Nanjing 210009,China;Department of Mechanical and Aerospace Engineering,The Hong Kong University of Science and Technology,Clear Water Bay,Hong Kong,China;WA School of Mines:Minerals,Energy and Chemical Engineering(WASM-MECE),Curtin University,Perth,WA 6845,Australia

材料科学技术（英文版）

[1]Xiandong Xiong;Jian Yu;Xiaojian Huang;Dan Zou;Yufei Song;Meigui Xu;Ran Ran;Wei Wang;Wei Zhou;Zongping Shao-.Slightly ruthenium doping enables better alloy nanoparticle exsolution of perovskite anode for high-performance direct-ammonia solid oxide fuel cells)[J].材料科学技术（英文版）,2022(30):51-58

Slightly,ruthe,75Ru0,CoFeRu,Pr00

ruthenium,doping,enables,better,alloy,exsolution,performance,direct,ammonia,solid,fuel,cells,Fuel,flexibility,one,most,distinguished,advantages,SOFCs,over,other,low,temperature,Furthermore,combination,should,promising,clean,energy,system,after,considering,density,easy,transportation,storage,matured,synthesis,technology,carbon,free,nature,NH3,well,efficiency,However,large,scale,applications,DA,are,strongly,limited,by,inferior,anti,sintering,capability,catalytic,activity,decomposition,reaction,conventional,nickel,cermet,Herein,slightly,oxides,proposed,abling,enhanced,power,outputs,operational,stability,After,treating,doped,6Sr0,4Co0,2Fe0,05O3,single,phase,reducing,atmosphere,addition,two,layered,Ruddlesden,Popper,perovskites,Pr2O3,nanoparticles,same,counterpart,8O3,remarkably,promoted,Such,reduced,composite,shows,superior,those,due,facilitated,stronger,substrate,interaction,This,work,provides,facile,effective,strategy,design,highly,active,durable,anodes,promoting,this

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