PdPtBi networked nanowires derived from Pd nanosheets as efficient catalysts for ethanol oxidation  

作　　者：Ningkang Qian Liang Ji Junjie Li Hui Zhang Deren Yang 

机构地区：[1]State Key Laboratory of Silicon Materials and School of Materials Science and Engineering,Zhejiang University,Hangzhou 310027,China [2]Zhejiang Provincial Key Laboratory of Power Semiconductor Materials and Devices,ZJU-Hangzhou Global Scientific and Technological Innovation Center,Hangzhou 311200,China

出　　处：《Nano Research》2023年第7期9125-9131,共7页纳米研究（英文版）

基　　金：This work was supported by National Program for Support of Topnotch Young Professionals,National Key R&D Program of China(No.2018YFB2200102);Foundation for Innovative Research Groups of the National Natural Science Foundation of China(No.61721005);the Fundamental Research Funds for the Central Universities(Nos.226-2022-00200 and 226-2022-00250).

摘　　要：Direct ethanol fuel cells(DEFCs)have received increasing attention as one of the most promising energy conversion devices.However,developing catalysts with high activity,long durability and strong anti-poisoning ability for ethanol oxidation is still challenging.Here,using Pd nanosheets as sacrificial templates,we have successfully synthesized PdPtBi networked nanowires(NWs)to improve the activity and stability for ethanol oxidation reaction(EOR)due to the addition of Bi.Density functional theory(DFT)calculations demonstrated the downshift of d-band center of Pd,which is beneficial to suppress CO poisoning and boost reaction kinetics for EOR.Impressively,the PdPtBi networked NWs exhibited the highest activity(11.08 A·mg_(Pd+Pt)^(-1)and 92.52 mA·cm^(-2))with an enhancement of 4.4 and 17.5 times relative to those of Pd/C,respectively and best stability with a 47.2%left versus only a 5.8%left for Pd/C of mass activity after 3,600 s towards EOR.This work deepens the understanding of controllable preparation of networked NWs and provides an effective strategy to design advanced catalysts with high activity and stability.

关 键 词：trimetallic PALLADIUM PLATINUM network NANOWIRE ethanol oxidation 

分 类 号：TB383[一般工业技术—材料科学与工程]