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

doi:10.3866/PKU.WHXB201505252

Abstract

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

Ming-Feng. SHANG,Pei-Quan. DUAN,Tian-Tian. ZHAO,Wen-Chao. TANG,Rui. LIN,Yu-Ying. HUANG,Jian-Qiang. WANG. In Situ XAFS Methods for Characterizing Catalyst Structure in Proton Exchange Membrane Fuel Cell[J]. Acta Phys. -Chim. Sin. 2015, 31(8), 1609-1614. doi: 10.3866/PKU.WHXB201505252

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

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