物理化学学报 >> 2015, Vol. 31 >> Issue (8): 1609-1614.doi: 10.3866/PKU.WHXB201505252

材料物理化学 上一篇    下一篇

用于质子交换膜燃料电池催化剂结构研究的原位XAFS实验方法

尚明丰1,段佩权1,赵天天2,唐文超2,林瑞2,黄宇营1,*(),王建强1,*   

  1. 1 中国科学院上海应用物理研究所,上海光源,上海201204
    2 同济大学汽车学院,上海201804
  • 收稿日期:2015-02-12 发布日期:2015-08-12
  • 通讯作者: 黄宇营,王建强 E-mail:huangyuying@sinap.ac.cn
  • 基金资助:
    国家重点基础研究发展规划项目(973)(2013CB933104);国家自然科学基金(91127001, 11079005)

In Situ XAFS Methods for Characterizing Catalyst Structure in Proton Exchange Membrane Fuel Cell

Ming-Feng. SHANG1,Pei-Quan. DUAN1,Tian-Tian. ZHAO2,Wen-Chao. TANG2,Rui. LIN2,Yu-Ying. HUANG1,*(),Jian-Qiang. WANG1,*   

  1. 1 Shanghai Synchrotron Radiation Facility, Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201204, P. R. China
    2 School of Automotive Studies, Tongji University, Shanghai 201804, P. R. China
  • Received:2015-02-12 Published:2015-08-12
  • Contact: Yu-Ying. HUANG,Jian-Qiang. WANG E-mail:huangyuying@sinap.ac.cn
  • Supported by:
    the National Key Basic Research Program (973) of China(2013CB933104);National Natural Science Foundationof China(91127001, 11079005)

摘要:

依托上海光源的X射线吸收精细结构(XAFS)谱学线站(BL14W1),建立并发展了用于氢-氧质子交换膜燃料电池(PEMFC)原位XAFS实验的测试装置,以Pt/C纳米催化剂作为PEMFC的阴极催化剂, Pd/C作为燃料电池的阳极催化剂,采集在工作状态下的阴极催化剂的XAFS数据,同步监测燃料电池的电流-电压(J-V)曲线和功率密度曲线,观察到Pt/C催化剂在反应过程中不同电位下氧化态的变化,在高电位下Pt/C催化剂的表面存在较强的Pt-O键,降低了Pt/C催化剂的性能.本文同时也验证了我们所建立的实验装置和研究方法的可行性和可靠性.

关键词: XAFS, 原位, 质子交换膜燃料电池, 催化剂

Abstract:

We established and developed an in situ X-ray absorption fine structure (XAFS) experimental testing device for characterizing hydrogen-oxygen proton exchange membrane fuel cells (PEMFC) on XAFS beamline BL14W1 at the Shanghai Synchrotron Radiation Facility (SSRF). XAFS data were collected under the operating state of the fuel cell with Pt/C and Pd/C as the cathode and anode catalysts, respectively, while the cell current-voltage (J-V) Curve and power density curves were monitored. Changes in the oxidation states of the Pt/C catalyst were observed during the reaction process at different potentials. Strong Pt-O bonds on the surfaces of the Pt were found to be induced at high potential; this may hinder the performance of Pt and reduce its oxygen reduction reaction (ORR) activity. The study also verified the reliability and feasibility of the herein established experimental apparatus and technique.

Key words: X-ray absorption fine structure, In situ, Proton exchange membrane fuel cell, Catalyst

MSC2000: 

  • O646