Re: Why can't some fuel cells run in reverse?


Mike McWilliams wrote:
> PlanckQ wrote:
> > 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?
> >
> > What thermodynamic reasoning dictates whether a fuel cell/battery can
> > be run in reverse or not?
> >
> >
> > Pete
> >
> I would imagine it would have to do with gassing off, or perhaps
> unwanted reactions happen in reverse at lower thresholds than the
> desired one.

Please check the difference of methanol and hydrogen and water.

.

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