Abstract
The recently discovered phenomenon of nonfaradaic electrochemical modification of catalytic activity (NEMCA) was explored for the electrocatalytic decomposition of H2S to H 2 and S 2 over Pt electrodes at 600-750~ and 1 atm. It was found that upon applying a potential to Pt supported on a 0 2 conducting yttria-stabilized zirconia disk, the decomposition of H2S significantly increased up to a factor of 11 at 600~ The results appear to verify several aspects of NEMCA including the phenomenon that the electrolyte needs not to conduct reaction-specific species and that the degree of rate enhancement is related to the working electrode polarization. In addition, results indicate that separate chambers are not always required for electrocatalysis.
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