Rh-doped PdAg nanoparticles as efficient methanol tolerance electrocatalytic materials for oxygen reduction

作     者：Yingjun Sun Bolong Huang Nuoyan Xu Yingjie Li Mingchuan Luo Chunji Li Yingnan Qin Lei Wang Shaojun Guo 

作者机构：Department of Materials Science & Engineering College of Engineering Peking University College of Chemistry and Molecular Engineering Qingdao University of Science and Technology Department of Applied Biology and Chemical Technology The Hong Kong Polytechnic University BIC-ESAT College of Engineering Peking University Department of Energy and Resources Engineering College of Engineering Peking University 

出 版 物：《Science Bulletin》 (科学通报（英文版）)

年 卷 期：2019年第64卷第1期

页      面：54-62页

核心收录：

学科分类：07[理学] 08[工学] 

基　　金：financially supported by the National Natural Science Foundation of China (NSFC) (51671003) National Basic Research Program of China (2017YFA0206701) the China Postdoctoral Science Foundation (2017M620526 and 2017M620518) Open Project Foundation of State Key Laboratory of Chemical Resource Engineering the Start-up Supports from Peking University and Young Thousand Talented Program, and Early Career Scheme (ECS) fund (PolyU 253026/16P) from the Research Grant Council (RGC) in Hong Kong 

主　　题：Rh-doped Multimetallic Oxygen reduction Methanol tolerance Fuel cells 

摘      要：Direct methanol fuel cells(DMFCs)have received extensive attention on their high efficiency,high reliability,and no carbon ***,the poor methanol tolerance and sluggish oxygen reduction reaction(ORR)at cathode have seriously hindered their further *** we report the synthesis of a new class of Rh-doped PdAg alloy nanoparticles(NPs)for boosting ORR activity with high methanol tolerance capacity *** ORR mass activity of typical Rh_4Pd_(40)Ag_(56)NPs is 4.2 times higher than that of commercial Pt ***,it shows a great methanol tolerance capability by maintaining 92.4%in ORR mass activity in alkaline solution with 0.1 mol L^(à1)methanol,against a big decrease of almost 100%for commercial *** after 30,000 potential cycles with 1.0 mol L^(à1)methanol,Rh_4Pd_(40)Ag_(56)NPs still retain ORR mass activity of up to 68.3%.DFT calculations reveal that excellent ORR performance with excellent methanol tolerance originates the active d-band-pinning engineering for an efficient site-independent electron-transfer.A generalized d-band mediated fine electron-transfer tuning path has blueprinted for effectively minimizing intrinsic ORR barriers with high current *** present work highlights the key role of Rh doping in enhancing the ORR activity and methanol tolerance ability of PdAg NPs for future high-performance DMFCs.