物理化学学报 >> 2014, Vol. 30 >> Issue (7): 1267-1273.doi: 10.3866/PKU.WHXB201405052

电化学和新能源 上一篇    下一篇

氮掺杂还原氧化石墨烯负载铂催化剂的制备及甲醇电氧化性能

王丽1, 马俊红1,2   

  1. 1. 新疆大学化学化工学院, 乌鲁木齐 830046;
    2. 新疆大学应用化学研究所, 先进功能材料自治区级重点实验室, 乌鲁木齐 830046
  • 收稿日期:2014-03-22 修回日期:2014-05-05 发布日期:2014-06-30
  • 通讯作者: 马俊红 E-mail:junhong@xju.edu.cn
  • 基金资助:

    新疆大学博士启动基金项目(BS100110),先进功能材料自治区重点实验室开放课题(XJDX0902-2010-06)及国家自然科学基金(21201146)资助

Synthesis and Electrocatalytic Properties of Pt Nanoparticles on Nitrogen-Doped Reduced Graphene Oxide for Methanol Oxidation

WANG Li1, MA Jun-Hong1,2   

  1. 1. College of Chemistry and Chemical Engineering, Xinjiang University, Urumqi 830046, P. R. China;
    2. Key Laboratory of Advanced Functional Materials, Autonomous Region, Institute of Applied Chemistry, Xinjiang University, Urumqi 830046, P. R. China
  • Received:2014-03-22 Revised:2014-05-05 Published:2014-06-30
  • Contact: MA Jun-Hong E-mail:junhong@xju.edu.cn
  • Supported by:

    The project was supported by the Doctoral Scientific Research Starting Foundation of Xinjiang University, China (BS100110), Open Project Program of Xinjiang Laboratory of Advanced Functional Materials, China (XJDX0902-2010-06), and National Natural Science Foundation of China (21201146).

摘要:

采用高温热解聚苯胺修饰的氧化石墨烯(PANI-GO),得到了氮掺杂的还原氧化石墨烯碳材料(N-RGO),以其负载Pt 制备了Pt/N-RGO纳米结构电催化剂. 采用透射电镜(TEM)、X射线光电子能谱(XPS)、X 射线衍射(XRD)谱及拉曼光谱等技术对N-RGO和Pt/N-RGO的形貌及结构进行了表征,用循环伏安、计时电流等电化学技术研究了Pt/N-RGO电极催化剂对CO溶出反应和甲醇电氧化反应的催化性能. 结果表明:高温热解PANIGO可同时实现GO的还原及其氮掺杂的过程,氮掺杂引起还原氧化石墨烯碳材料表面缺陷结构和导电性的增加;与相应的未掺杂氮样品Pt/RGO相比较,Pt/N-RGO样品上Pt 颗粒的分散更均匀,显示出更强的抗CO毒化能力和更高的甲醇电氧化催化活性及稳定性.

关键词: 聚苯胺, 还原氧化石墨烯, 氮掺杂, 铂电催化剂, 甲醇氧化

Abstract:

Nitrogen-doped reduced graphene oxide materials (N-RGO) derived from pyrolysis of graphene oxide (GO)/polyaniline composites were used as a support for the immobilization of Pt nanoparticles. The morphologies and structures of N-RGO and Pt/N-RGO were comprehensively characterized by transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), and Raman spectroscopy. The electrocatalytic activities of the as-prepared catalysts for CO stripping and methanol oxidation were investigated by cyclic voltammetry and chronoamperometry. The results showed that GO was reduced to multilayer graphene by thermal annealing accompanied with successful incorporation of N atoms into RGO. Moreover, the presence of the doped N atoms enhanced the surface defects and electrical conductivity of the RGO materials. Pt nanoparticles on N-RGO were more evenly dispersed, had better CO tolerance, and had higher activity/stability for methanol oxidation than those on RGO without N doping.

Key words: Polyaniline, Reduced graphene oxide, Nitrogen-doped, Platinum electrocatalyst, Methanol oxidation

MSC2000: 

  • O646