The catalyst found in most fuel cells is composed of platinum, but Dr. Fraser Armstrong, a chemistry professor at Oxford University, believes that enzymes known as hydrogenases may hold the key to efficiently unlock the power of hydrogen.
Armstrong says that hydrogenases are actually more effective than platinum at converting hydrogen into electrons, but the process is not fully understood yet. So far his lab has been able to create a working fuel cell capable of powering a wrist watch.

Not only is platinum a scarce and expensive precious metal, but it's uncertain whether or not there's even a large enough platinum supply if fuel cells become popular.

[Source: Reuters]

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