In-Situ Liquid TEM Study on the Degradation Mechanism of Fuel Cell Catalysts

Event
SAE 2016 World Congress and Exhibition
Authors Abstract
Content
Electrode catalyst (platinum) degradation represents a major challenge to the performance and durability of polymer electrolyte membrane fuel cells (PEMFCs) in Fuel Cell Vehicles (FCVs). While various mechanisms have been proposed and investigated previously, there is still a need to develop in situ imaging techniques that can characterize and provide direct evidence to confirm the degradation process. In the present study, we report an in situ transmission electron microscopy (TEM) method that enables real time, high-resolution observation of carbon-supported platinum nanoparticles in liquid electrolyte under working conditions. By improving the design of the Micro Electro Mechanical Systems (MEMS) sample holder, the migration and aggregation of neighboring platinum nanoparticles could be visualized consistently and correlated to applied electrode potentials during aging process (i.e., cyclic voltammetry cycles). It can be expected that information acquired through this novel approach would provide valuable insight that may lead to the optimal design of new electrode catalysts to resolve the catalyst degradation issue.
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DOI
https://doi.org/10.4271/2016-01-1192
Pages
6
Citation
Kato, H., "In-Situ Liquid TEM Study on the Degradation Mechanism of Fuel Cell Catalysts," Alternative Powertrains 5(1):189-194, 2016, https://doi.org/10.4271/2016-01-1192.
Additional Details
Publisher
Published
Apr 5, 2016
Product Code
2016-01-1192
Content Type
Journal Article
Language
English