Investigation of cubic Pt alloys for ammonia oxidation reaction

作     者：Yat Tung Chan Kumar Siddharth Minhua Shao Yat Tung Chan;Kumar Siddharth;Minhua Shao

作者机构：Department of Chemical and Biological EngineeringThe Hong Kong University of Science and TechnologyClear Water BayKowloonHong KongChina 

出 版 物：《Nano Research》 (纳米研究（英文版）)

年 卷 期：2020年第13卷第7期

页      面：1920-1927页

核心收录：

学科分类：08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：Research Grant Council(Nos.26206115 and 16304117)of the Hong Kong Special Administrative Region 

主　　题：ammonia oxidation reaction electrocatalysts Pt-3d transition metal nanocubes OH adsorption 

摘      要：As a promising fuel candidate,ammonia has been successtully used as anode feed in alkaline fuel ***,current technology in catalysts for ammonia electro-oxidation reaction(AOR)with respect to both cost and performance is inadequate to ensure large scale commercial application of direct ammonia fuel *** studies found that alloying Pt with different transition metals and controlling the morphology of catalysts can improve the AOR activity,and thus potentially can solve the cost ***,(100)-terminated Pt-M nanocubes(M=3d-transition metals Fe,Co,Ni,Zn)are synthesized via wet-chemistry method and their catalytic activities toward AOR are *** addition of Fe,Co,Ni and Zn elements can enhance the AOR activity due to decrease in oxophilicity of platinum and bifunctional ***-Zn exhibits the maximum mass activity and specific ativity with values of 0.41 A/mgpt and 169 mA/cm2 that are 1.6 and 1.8 times higher than Pt nanocubes,***-Fe,Pt-Co and PI-Ni nanocubes also ilustrate higher mass and specific activities compared to Pt nanocubes.