Experimental study demonstrates zero performance loss over 500 hours in hydrogen-air fuel cells, indicating enhanced durability from carbon-nanotube-promoted graphene formation.
A non-precious metal catalyst for oxygen reduction in acid media, enriched in graphene sheets/bubbles during a high-temperature synthesis step, has been developed from an Fe precursor and in situ polymerized polyaniline, supported on multi-walled carbon nanotubes. The catalyst showed no performance loss for 500 hours in a hydrogen/air fuel cell. The improved durability is correlated with the graphene formation, apparently enhanced in the presence of carbon nanotubes.
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Wu et al. (2013) studied this question.
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