Journal article

Electrochemical promotion of RuO2 catalysts for the combustion of toluene and ethylene

The electrochem. promotion of the complete catalytic oxidn. of ethylene and toluene on RuO2Catalyst films deposited on Y2O3-stabilized-ZrO2 (YSZ) was studied at temps. 400 to 500 Deg. Anodic polarization (1.5 V), i.e. O2- supply from the YSZ support to the catalyst, is found to enhance the rates of ethylene and toluene oxidn. by a factor of 10 and 8 resp. Cathodic polarization (-1.5 V) i.e. oxygen removal from the catalyst, enhances the oxidn. rates by a factor of 3 and 4, resp. These rate enhancements are strongly nonfaradaic. The kinetics, pos. order in both reactants, and the promotional results, inverted-volcano type for both reactions, conform to the recently found rules of electrochem. promotion. [on SciFinder (R)]


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