文献类型：期刊文献

英文题名：PtCo/N-doped carbon sheets derived from a simple pyrolysis of graphene oxide/ZIF-67/H2PtCl6 composites as an efficient catalyst for methanol electro-oxidation

作者：Lv, Yuhong[1];Li, Xingwei[1]

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

年份：2020

卷号：45

期号：23

起止页码：12766

外文期刊名：INTERNATIONAL JOURNAL OF HYDROGEN ENERGY

收录：;EI(收录号：20201508392058);WOS:【SCI-EXPANDED(收录号:WOS:000526115700012)】；

语种：英文

外文关键词：PtCo; N-doped carbon sheets; ZIF-67; Methanol electro-oxidation

摘要：Many alloy catalysts have been developed for methanol electro-oxidation, but most synthetic methods are complicated. Herein, PtCo alloy catalysts supported on N-doped carbon sheets (PtCo/NCS) are successfully prepared by a simple pyrolysis of graphene oxide/ZIF-67/H2PtCl6 composites at different temperatures (700, 800, 900 degrees C) under a gas flow of H-2/Ar, in which ZIF-67 is served as Co and N sources. SEM, TEM, XRD, XPS and electrochemical characterization are employed to study as-prepared catalysts. In acidic methanol solution, the area-specific activity (1.25 mA cm(-2) Pt) of PtCo alloy catalyst obtained at 800 degrees C (PtCo/ NCS-800) is 2.6 times of commercial Pt/C (0.48 mA cm(-2) Pt), and the area-specific activity of PtCo/NCS-800 is 3.5 times of Pt/C after 1000 cycles. Furthermore, an improved CO-tolerance of Pt is confirmed. The electronic effect and synergistic effect of metallic elements are responsible for outstanding performance of as-prepared catalysts. This work provides a simple approach to obtain high performance alloy catalysts. (C) 2020 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.