Improvement of electrocatalytic alcohol oxidation by tuning the phase structure of atomically ordered intermetallic Pd-Sn nanowire networks

作     者：Zhengshuai Cao Xianzhuo Lao Fahui Gao Min Yang Jing Sun Xuehua Liu Rui Su Jianyu Chen Peizhi Guo 曹政帅;劳显焯;高法辉;杨敏;孙静;刘雪华;苏瑞;陈建宇;郭培志

作者机构：Institute of Materials for Energy and EnvironmentCollege of Materials Science and EngineeringQingdao UniversityQingdao 266071China 

出 版 物：《Science China Materials》 (中国科学（材料科学（英文版）)

年 卷 期：2022年第65卷第10期

页      面：2694-2703页

核心收录：

学科分类：081705[工学-工业催化] 08[工学] 0817[工学-化学工程与技术] 

基　　金：supported by the National Natural Science Foundation of China(22172084 and 21773133) the World-Class Discipline Program of Shandong Province,China 

主　　题：PdSn intermetallic compounds alloy electrocatalysis fuel cell 

摘      要：Atomically ordered intermetallic compounds(OICs)have aroused remarkable interests for wide applications and are considered as very promising materials for electrocatalysis owing to the strict stoichiometry,well-defined atom binding environment,and the specific crystalline ***,the tunable synthesis of the intermetallics remains a giant ***,this study reports the preparation of the Pd-Sn OICs composed of an interconnected nanowire network structure with adjustable molar ratios of elements Pd and *** co-reduction of Pd(acac)_(2) and SnCl_(2)·2H_(2)O in ethylene glycol(EG)in the presence of sodium hypophosphite(NaH_(2)PO_(2))as the reducing agent affords OICs of three phases:hexagonal Pd_(3)Sn_(2-)P6_(3)/mmc,orthorhombic PdSn-Pnmb,and orthorhombic PdSn_(2)-Aba_(2).Also,the pure phase can convert to two mixed phases(Pd_(3)Sn_(2)/PdSn and PdSn/PdSn_(2))by just altering the feed *** is found that orthorhombic PdSn-Pnmb OIC has a large electrochemically active surface area(ECSA),excellent electrocatalytic performance(4857 mA mg_(Pd)^(−1)),and outstanding stability toward ethanol oxidation reaction(EOR),which could be attributed to its optimal electronic *** results demonstrate that the phase engineering of OICs with desired components is an excellent way for catalysts design.