caa a22 4500 475816412 CHVBK 20180406123811.0 cr unu---uuuuu 170329e20001101xx s 000 0 eng 10.1023/A:1026505829359 doi (NATIONALLICENCE)springer-10.1023/A:1026505829359 Electrochemical promotion of Rh catalyst in gas-phase reduction of NO by propylene [Elektronische Daten] [G. Fóti, O. Lavanchy, C. Comninellis] The concept of non-faradaic electrochemical modification of catalytic activity (NEMCA) has been applied for the in situ control of catalytic activity of a rhodium film deposited on YSZ (yttria stabilized zirconia) solid electrolyte towards reduction of 1000 ppm NO by 1000 ppm C3H6 in presence of excess (5000 ppm) O2 at 300 °C. A temporary heating at this feed composition results in a long-lasting deactivation of the catalyst under open circuit conditions due to partial oxidation of the rhodium surface. Positive current application (5 μA) over both the active and the deactivated catalysts gives rise to an enhancement of N2 and CO2 production, the latter exceeding several hundred times the faradaic rate. While active rhodium exhibits a reversible behaviour, electrochemical promotion on the deactivated catalyst is composed of a reversible and an irreversible part. The reversible promotion results from the steady-state accumulation of current-generated active species at the gas exposed catalyst surface whereas the irreversible effect is due to the progressive reduction of the catalyst resulting in an increased recovery rate of lost catalytic activity. The results are encouraging with respect to application of rhodium for the catalytic removal of NO from auto-exhaust gases under lean-burn conditions. Kluwer Academic Publishers, 2000 electrochemical promotion nationallicence lean-burn catalysts nationallicence NO reduction nationallicence propylene nationallicence rhodium nationallicence Fóti G. Institute of Chemical Engineering, Swiss Federal Institute of Technology, CH-1015, Lausanne, Switzerland aut Lavanchy O. Institute of Chemical Engineering, Swiss Federal Institute of Technology, CH-1015, Lausanne, Switzerland aut Comninellis C. Institute of Chemical Engineering, Swiss Federal Institute of Technology, CH-1015, Lausanne, Switzerland aut Journal of Applied Electrochemistry Kluwer Academic Publishers 30/11(2000-11-01), 1223-1228 0021-891X 30:11<1223 2000 30 10800 https://doi.org/10.1023/A:1026505829359 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1023/A:1026505829359 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Fóti G. Institute of Chemical Engineering, Swiss Federal Institute of Technology, CH-1015, Lausanne, Switzerland aut NATIONALLICENCE 700 1- Lavanchy O. Institute of Chemical Engineering, Swiss Federal Institute of Technology, CH-1015, Lausanne, Switzerland aut NATIONALLICENCE 700 1- Comninellis C. Institute of Chemical Engineering, Swiss Federal Institute of Technology, CH-1015, Lausanne, Switzerland aut NATIONALLICENCE 773 0- Journal of Applied Electrochemistry Kluwer Academic Publishers 30/11(2000-11-01), 1223-1228 0021-891X 30:11<1223 2000 30 10800 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer