Electrochemical Promotion of NO Reduction by C2H4 in Excess O2 Using a Monolithic Electropromoted Reactor and Pt–Rh Sputtered Electrodes
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The reduction of NO by ethylene in the presence of excess oxygen was investigated in a recently developed monolithic electropromoted reactor (MEPR). In this novel dismantlable monolithic-type electrochemically promoted catalytic reactor, thin (~40 nm) porous catalyst films are sputter-deposited on thin (0.25 mm) parallel solid electrolyte plates supported in the grooves of a ceramic monolithic holder and serve as electropromoted catalyst elements. Using Pt–Rh(1:1)/YSZ/Au-type catalyst elements, the 8-plate reactor operated with apparent Faradaic efficiency exceeding unity achieving significant and reversible enhancement in the rates of C2H4 and NO consumption in presence of up to 10% O2 in the feed at gas flow rates of 1,000 cc/min. The reactor, which is a hybrid between a monolithic catalytic reactor and a flat-plate solid oxide fuel cell, permits easy practical utilization of the electrochemical promotion of catalysis.
KeywordsElectrochemical promotion NEMCA Monolithic Electropromoted Reactor MEPR NO reduction Rhodium–Platinum catalyst electrodes Yttria-stabilized Zirconia Sputtered electrodes
This work was supported by TOYOTA.
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