Abstract
To realize a zero-emission society for the future, intensive research is being conducted to commercialize fuel cells as an ideal solution for non-polluting electric vehicles and power plants. However, technical issues such as performance degradation due to adsorption of ionomers and spectator ions, catalyst poisoning by CO in reformed H2 fuel, and reverse current flow under shut-down/start-up conditions still remain to be addressed. In this review, an interesting concept based on the molecular sieve effect is introduced to overcome the systemic challenges associated with fuel cell operation and electrode structure. In particular, we discuss in detail practical cases in which the performance and durability of fuel cells have been improved through the innovative catalyst design.
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