文献类型：期刊文献

英文题名：L12 Atomic Ordered Substrate Enhanced Pt-Skin Cu3Pt Catalyst for Efficient Oxygen Reduction Reaction

作者：Cheng, Na[1];Zhang, Ling[1];Mi, Shuying[1];Jiang, Hao[1];Hu, Yanjie[1];Jiang, Haibo[1];Li, Chunzhong[1]

机构：[1]East China Univ Sci & Technol, Sch Mat Sci & Engn, Key Lab Ultrafine Mat, Minist Educ, Shanghai 200237, Peoples R China

年份：2018

卷号：10

期号：44

起止页码：38015

外文期刊名：ACS APPLIED MATERIALS & INTERFACES

收录：;EI(收录号：20184406024069);WOS:【SCI-EXPANDED(收录号:WOS:000449887600027)】；

基金：This work was supported by the National Natural Science Foundation of China (21776092, 91534202, 91534122), the Social Development Program of Shanghai (17DZ1200900), Innovation Program of Shanghai Municipal Education Commission, the Fundamental Research Funds for the Central Universities (222201718002), the Shanghai Scientific and Technological Innovation Project (18JC1410600), and the Program for Professor of Special Appointment (Eastern Scholar) at Shanghai Institutions of Higher Learning.

语种：英文

外文关键词：oxygen reduction reaction; intermetallic; atomic ordering; Pt skin; oxygen adsorption energy

摘要：Constructing Pt skin on intermetallics has been confirmed as an efficient strategy to boost oxygen reduction reaction (ORR) kinetics. However, there still lacks a systematic study on revealing the influence of low-Pt-content intermetallic substrates (L1(2)-PtM3). In this paper, Pt skin encapsulated low-Pt-mole-fraction L1(2) Cu3Pt has been constructed (denoted as Pt-o-Cu3Pt/C) and compared with its disordered analogue (denoted as Pt-d-Cu3Pt/C). The L1(2) substrate shows a contracted lattice structure and provides Pt-o-Cu3Pt/C with an excellent specific activity of 1.73 mA cm(-2), which is 1.4- and 8.4-fold higher than that of Pt-d-Cu3Pt/C and commercial Pt/C, respectively. Density functional theory calculations reveal that this superior performance is attributed to the more favorable oxygen adsorption energy of surface Pt atoms. Furthermore, the lower formation energy of L1(2) Cu3Pt combined with the enhanced antioxygenation of Pt provide Pt-o-Cu3Pt/C with a superior durability, showing only a 12.5% loss in mass activity after 5000 potential cycles. Therefore, it is suggested that L1(2) atomic ordered structure with a low Pt fraction is a promising substrate for building high-performance Pt-skin catalysts for ORR.