Defect-density control of platinum-based nanoframes with high-index facets for enhanced electrochemical properties

作     者：Shaohan Yang Shuna Li Lianghao Song Yipin Lv Zhongyao Duan Chunsheng Li Raphael Francesco Praeg Daowei Gao Guozhu Chen 

作者机构：School of Chemistry and Chemical EngineeringUniversity of JinanJinan250022China Institute for Solar FuelsHelmholtz Zentrum Berlin für Materialien und Energie GmbHBerlin14109Germany Young Investigator Group Operando Characterization of Solar Fuel MaterialsHelmholtz-Zentrum Berlin für Materialien und Energie GmbHBerlin12489Germany 

出 版 物：《Nano Research》 (纳米研究（英文版）)

年 卷 期：2019年第12卷第11期

页      面：2881-2888页

核心收录：

学科分类：081704[工学-应用化学] 07[理学] 070304[理学-物理化学(含∶化学物理)] 08[工学] 0817[工学-化学工程与技术] 0703[理学-化学] 

基　　金：This work was supported by the National Natural Science Foundation of China(Nos.21808079 and 21878121) Natural Science Foundation of Shandong Province(No.ZR2017BB029) China Postdoctoral Science Foundation(No.2017M610405) International Postdoctoral Exchange Fellowship Program Between Helmholtz-Zentrum Berlin für Materialien und Energie GmbH,OCPC and University of Jinan 

主　　题：nanoframes defect-density high-index facets electrocatalyst 

摘      要：Structure-engineered platinum-based nanoframes(NFs)at the atomic level can effectively improve the catalytic performance for fuel cells and other heterogeneous catalytic *** report herein,a microwave-assisted wet-chemical method for the preparation of platinum-copper-cobalt NFs with tunable defect density and architecture,which exhibit enhanced activity and durability towards the electro-oxidation reactions of methanol(MOR)and formic acid(FAOR).By altering the reduction/capping agents and thus the nucleation/growth kinetics,trimetallic platinum-copper-cobalt hexapod NFs with different density high-index facets are ***,the rough hexapod nanoframes(rh-NFs)exhibit excellent specific activities towards MOR and FAOR,7.25 and 5.20 times higher than those of benchmark Pt/C,respectively,along with prolonged *** excellent activities of the rh-NFs are assigned to a synergistic effect,including high density of defects and high-index facets,suitable d-band center,and open-framework *** synergistic working mechanism opens up a new way for enhancing their electrocatalytic performances by increasing defect density and high-index facets in open-framework platinum-based NFs.