Polymer Electrolyte Fuel Cells (PEFC)
Evaluation of Durability of Catalysts (1)

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Example of analysis

Using two types of commercially available carbon-supported platinum (Pt) catalysts, the catalysts were caused to degrade in a potential cycle test. The properties of the catalysts were determined, and the degraded conditions of the catalysts were evaluated.

・Potential cycle test conditions: 0.6V-0.9V (0.1V/sec), 2,000 cycles*
* Reference publication: “Proposal for Targets and Research/Development Themes for Polymer Electrolyte Fuel Cells and Evaluation Methods” published
the Fuel Cell Commercialization Conference of Japan in January, 2007

【Cyclic voltammogram (CV curve) before and after test】

A comparison between before and after potential cycle test indicates that both Catalyst A and Catalyst B became smaller in the area surrounded by the CV curve and in the surface area of Pt.

【Changes in properties as compared between before and after the test】

It was found that after potential cycle test, compared with Catalyst B, Catalyst A showed (1) a larger amount of Pt elute into the electrolytic solution and (2) lower activity. From these, it can be presumed that Catalyst B is superior in durability.

Search Number 6G009

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