Performance of membrane electrode assemblies using PdPt alloy as anode catalysts in polymer electrolyte membrane fuel cell

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• 作者：Yoon-Hwan Cho^a ; Yong-Hun Cho^b ; ^{yhun00@kookmin.ac.kr} ; Ju Wan Lim^a ; Hee-Young Park^a ; Namgee Jung^a ; Minjeh Ahn^a ; Heeman Choe^b ; Yung-Eun Sung^a ; ^{ysung@snu.ac.kr}
• 关键词：Polymer electrolyte membrane fuel cell ; PdPt electrocatalyst ; Anode ; Membrane electrode assembly
• 刊名：International Journal of Hydrogen Energy
• 出版年：2012
• 期刊代码：42_03603199
• 类别：ch
• 出版时间：April, 2012
• 卷：37
• 期：7
• 页码：5884-5890
• 文件大小：1259 K

摘要

Pd-based nanoparticles, such as 40聽wt.%carbon-supported Pd₅₀Pt₅₀, Pd₇₅Pt₂₅, Pd₉₀Pt₁₀ and Pd₉₅Pt₅, for anode electrocatalyst on polymer electrolyte membrane fuel cells (PEMFCs) were synthesized by the borohydride reduction method. PdPt metal particles with a narrow size distribution were dispersed uniformly on a carbon support. The membrane electrode assembly (MEA) with Pd₉₅Pt₅/C as the anode catalyst exhibited comparable single-cell performance to that of commercial Pt/C at 0.7聽V. Although the Pt loading of the anode with Pd₉₅Pt₅/C was as low as 0.02聽mg聽cm^鈭?, the specific power (power to mass of Pt in the MEA) of Pd₉₅Pt₅/C was higher than that of Pt/C at 0.7聽V. Furthermore, the single-cell performance with Pd₅₀Pt₅₀/C and Pd₇₅Pt₂₅/C as the anode catalyst at 0.4聽V was approximately 95%that of the MEA with the Pt/C catalyst. This indicated that a Pd-based catalyst that has an extremely small amount of Pt (only 5 or 50聽at.%) can be replaced as an anode electrocatalyst in PEMFC.