Catalytic activity electrochemical

Thus, as will be shown in this book, the effect of electrochemical promotion (EP), or NEMCA, or in situ controlled promotion (ICP), is due to an electrochemically induced and controlled migration (backspillover) of ions from the solid electrolyte onto the gas-exposed, that is, catalytically active, surface of metal electrodes. It is these ions which, accompanied by their compensating (screening) charge in the metal, form an effective electrochemical double layer on the gas-exposed catalyst surface (Fig. 1.5), change its work function and affect the catalytic phenomena taking place there in a very pronounced, reversible, and controlled manner. 

C.G. Vayenas, S. Bebelis, and S. Neophytides, Non-Faradaic Electrochemical Modification of Catalytic Activity, J. Phys. Chem. 92, 5083-5085 (1988). 

A. Kaloyannis, and C.G. Vayenas, Non-Faradaic electrochemical modification of catalytic activity. 12 Propylene oxidation on Pt, J. Catal. 182, 37-47 (1999). 

D. Tsiplakides, J. Nicole, C.G. Vayenas, and C. Comninellis, Work function and catalytic activity measurements of an Ir02 film deposited on YSZ subjected to in situ electrochemical promotion,/. Electrochem. Soc. 145(3), 905-908 (1998). 

M. Makri, A. Buekenhoudt, J. Luyten, and C.G. Vayenas, Non-Faradaic Electrochemical Modification of the Catalytic Activity of Pt using aCaZr09ln0 03.a Proton Conductor, Ionics 2, 282-288 (1996). 

D. Tsiplakides, S. Neophytides, O. Enea, M.M. Jaksic, and C.G. Vayenas, Non-faradaic Electrochemical Modification of Catalytic Activity (NEMCA) of Pt Black Electrodes Deposited on Nafion 117 Solid Polymer Electrolyte, /. Electrochem. Soc. 144(6), 2072-2088 (1997). 

It also shows that electrochemical promotion is due to electrochemically controlled migration (backspillover) of ions (acting as promoters) from the solid electrolyte to the gas-exposed catalytically active catalyst-electrode surface. 

Electrochemical Modification of Catalytic Activity 9. Ethylene oxidation on Pt deposited on Ti02, /. Catal. 159, 189-203 (1996). 

Electrochemical Modification of Catalytic Activity 8. Rh-catalyzed C2H4 oxidation, J. Catal. 154, 124-136(1995). 

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