Why can't some fuel cells operate in reverse?

From: "PlanckQ" <engpete@xxxxxxxxxxx>
Date: 25 Oct 2005 08:04:50 -0700

Many of us are aware that hydrogen fuel cells can be run in reverse
mode (electrolysis of water).

Why then can't methanol fuel cells be also run in reverse? Can someone
present a strong thermodynamic argument?

Pete

.

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