O2 sensor response times

[Espen Hilde]

I cant clame to be a chemestry expert.....I cant even spell it right....
It looks to me that in the CAT the not burned O2 can attach to the 
platinum and stays there untill a HC comes by......

Espen
> Yes, but that's in a place where contact of the platinum with the
> exhaust gases catalyzes/oxidizes the HC and CO gas components (namely,
> in a CAT). Are you saying that this effect is part of the operation of
> the O2 sensor? If so, it's never mentioned in any of the papers AFAIK. 
> 
> But since I've admitted I'm a total putz in this electrochemical realm,
> I CAN see how the fact that gas components (H, HC, CO) seem to like
> platinum, certainly might dispose it for use as the outer electrodes.
>
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