文献类型：期刊文献

英文题名：Active sites engineering of Pt/CNT oxygen reduction catalysts by atomic layer deposition

作者：Gan, Jie[1];Zhang, Jiankang[2];Zhang, Baiyan[2];Chen, Wenyao[1];Niu, Dongfang[1];Qin, Yong[2];Duan, Xuezhi[1];Zhou, Xinggui[1]

机构：[1]East China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China;[2]Chinese Acad Sci, Inst Coal Chem, State Key Lab Coal Convers, Taiyuan 030001, Shanxi, Peoples R China

年份：2020

卷号：45

起止页码：59

外文期刊名：JOURNAL OF ENERGY CHEMISTRY

收录：;EI(收录号：20194407609785);WOS:【SCI-EXPANDED(收录号:WOS:000520405600009)】；

基金：This work was financially supported by the Natural Science Foundation of China (21922803 and 21776077), the Shanghai Natural Science Foundation (17ZR1407300 and 17ZR1407500), the Program for the Professor of Special Appointment (Eastern Scholar) at Shanghai Institutions of Higher Learning, the Shanghai RisingStar Program (17QA1401200), the State Key Laboratory of Organic-Inorganic Composites (oic-201801007), and the Open Project of State Key Laboratory of Chemical Engineering (SKLChe-15C03).

语种：英文

外文关键词：Oxygen reduction; Pt/CNT catalyst; Atomic layer deposition; Active sites

摘要：Understanding carbon-supported Pt-catalyzed oxygen reduction reaction (ORR) from the perspective of the active sites is of fundamental and practical importance. In this study, three differently sized carbon nanotube-supported Pt nanoparticles (Pt/CNT) are prepared by both atomic layer deposition (ALD) and impregnation methods. The performances of the catalysts toward the ORR in acidic media are comparatively studied to probe the effects of the sizes of the Pt nanoparticles together with their distributions, electronic properties, and local environments. The ALD-Pt/CNT catalysts show much higher ORR activity and selectivity than the impregnation-Pt/CNT catalysts. This outstanding ORR performance is ascribed to the well-controlled Pt particle sizes and distributions, desirable Pt-0 4f binding energy, and the Cl-free Pt surfaces based on the electrocatalytic measurements, catalyst characterizations, and model calculations. The insights reported here could guide the rational design and fine-tuning of carbon-supported Pt catalysts for the ORR. (C) 2019 Science Press and Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Published by Elsevier B.V. and Science Press. All rights reserved.