Single-Site Cu-Doped PdSn Wavy Nanowires for Highly Active,Stable,and CO-Tolerant Ethanol Oxidation Electrocatalysis  

作　　者：Jiaqi Su Jie Feng Yonggang Feng Shangheng Liu Bingyan Xu Yue Lin Jinyu Ye Ying Zhang Youyong Li Qi Shao Xiaoqing Huang 

机构地区：[1]College of Chemistry,Chemical Engineering and Materials Science,Soochow University,Suzhou 215123,China [2]Institute of Functional Nano&Soft Materials(FUNSOM),Soochow University,Jiangsu 215123,China [3]State Key Laboratory of Physical Chemistry of Solid Surfaces,College of Chemistry and Chemical Engineering,Xiamen University,Xiamen 361005,China [4]Hefei National Laboratory for Physical Sciences at the Microscale,University of Science and Technology of China,Hefei 230026,China [5]Wenzhou Key Lab of Advanced Energy Storage and Conversion,Zhejiang Province Key Lab of Leather Engineering,College of Chemistry and Materials Engineering,Wenzhou University,Wenzhou 325035,China

出　　处：《Precision Chemistry》2023年第6期363-371,共9页精准化学（英文）

基　　金：the National Natural Science Foundation of China(21905188);the major project of Basic Science(natural science)of Jiangsu Province(21KJA430001);the Jiangsu Provincial Natural Science Foundation(BK20211316);the Suzhou Municipal Science and Technology Bureau(SYG202125);the State Key Laboratory of Physical Chemistry of Solid Surfaces,Xiamen University(202113)。

摘　　要：Developing a catalyst to break the tradeoff relation-ship between the catalytic activity and antipoisoning property toward the ethanol oxidation reaction(EOR)is of critical importance to the development of direct ethanol fuel cells(DEFCs),but remains challenging.Here,we developed a unique class of single-site Cu-doped PdSn wavy nanowires(denoted as SS Cu−PdSn WNWs)with promoted activity and durability toward alkaline EOR.Detailed characterizations reveal the atomic isolation of Cu species dispersed on the surface of the PdSn WNWs with distinct wavy structure and grain boundaries.The created SS Cu−PdSn WNWs exhibit an enhanced EOR performance in terms of mass activity,which is higher than those of PdSn WNWs,commercial Pd black,and commercial Pd/C,respectively.Moreover,the SS Cu−PdSn WNWs can also show improved stability as compared to other catalysts due to the improved antipoisoning property from the unique surface anchoring structure.Further investigations demonstrate that the doped SS Cu can strongly inhibit the adsorption of CO and promote the reaction process of EOR.DFT results reveal that the doped Cu shifts down the d-band center of PdSn,thereby modifying the adsorption of intermediates and reducing the reaction barrier of EOR.This work maps a pathway for optimally boosting EOR performance with surface engineering via atomic doping.

关 键 词：single site PDSN NANOWIRE ethanol oxidation reaction CO tolerant ELECTROCATALYSIS 

分 类 号：O64[理学—物理化学]