• 文献标题:   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
  • 文献类型:   Article
  • 作  者:   LV YH, LI XW
  • 作者关键词:   ptco, ndoped carbon sheet, zif67, methanol electrooxidation
  • 出版物名称:   INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
  • ISSN:   0360-3199 EI 1879-3487
  • 通讯作者地址:   East China Univ Sci Technol
  • 被引频次:   1
  • DOI:   10.1016/j.ijhydene.2020.02.204
  • 出版年:   2020

▎ 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.