典型文献
Exploiting H-induced lattice expansion in β-palladium hydride for enhanced catalytic activities toward oxygen reduction reaction
文献摘要：
We have developed an efficient strategy to synthesize an active and durable electrocatalyst of Pd hy-dride nanocubes(NCs).Instead of the traditional chemical method,the PdHo.43 NCs are firstly prepared via a hydrogen diffusion procedure,followed by hydrothermal synthesis of an amorphous CuO layer en-capsulating the PdH0.43 NCs to prevent the hydrogen atoms from escaping.Obvious lattice expansion is demonstrated playing a pivotal role in the enhancement of their oxygen reduction reaction(ORR)activ-ity and durability.The obtained PdH0.43@CuO NCs catalysts exhibit an ORR mass activity of 0.18 A mg-1 at 0.90 V versus reversible hydrogen electrode in an alkaline medium,which is about five times higher than that of commercial Pt/C.Accelerated durability tests show that there is only a 32 mV decay in half-wave potential even after 10,000 potential cycles,indicating the excellent stability of PdH0.43@CuO NCs.Density functional theory(DFT)calculations also indicate that,compared to Pd,PdH0.43 has a lower lim-iting barrier to form OH-during the ORR process.The present study illustrates the importance of lattice expansion caused by hydrogen and offers an available strategy to design highly efficient and durable Pd-based electrocatalysts for alkaline fuel cells.
文献关键词：
中图分类号：
作者姓名：
Yunwei Liu;Zelin Chen;Chang Liu;Jinfeng Zhang;Wenbin Hu;Yida Deng
作者机构：
Tianjin Key Laboratory of Composite and Functional Materials,School of Materials Science and Engineering,Tianjin University,Tianjin 300372,China;State Key Laboratory of Marine Resource Utilization in South China Sea,School of Materials Science and Engineering,Hainan University,Haikou 570228,China
文献出处：
引用格式：
[1]Yunwei Liu;Zelin Chen;Chang Liu;Jinfeng Zhang;Wenbin Hu;Yida Deng-.Exploiting H-induced lattice expansion in β-palladium hydride for enhanced catalytic activities toward oxygen reduction reaction)[J].材料科学技术（英文版）,2022(03):205-211
A类：
dride,PdHo,capsulating,PdH0
B类：
Exploiting,induced,lattice,expansion,palladium,hydride,enhanced,catalytic,activities,toward,oxygen,reduction,reaction,We,have,developed,efficient,strategy,synthesize,active,durable,nanocubes,NCs,Instead,traditional,chemical,method,firstly,prepared,via,hydrogen,diffusion,procedure,followed,by,hydrothermal,synthesis,amorphous,CuO,layer,prevent,atoms,from,escaping,Obvious,demonstrated,playing,pivotal,role,enhancement,their,ORR,durability,obtained,exhibit,mass,activity,versus,reversible,electrode,alkaline,medium,which,about,five,times,higher,than,that,commercial,Pt,Accelerated,tests,show,there,only,mV,decay,half,wave,potential,after,cycles,indicating,excellent,stability,Density,functional,theory,DFT,calculations,also,indicate,compared,has,lower,lim,barrier,form,during,process,present,study,illustrates,importance,caused,offers,available,design,highly,electrocatalysts,fuel,cells
AB值：
0.584613
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