The electrochemical promotion of ethylene oxidation at a Pt/YSZ catalyst.
作者： Arafat Toghan , Liz M. Rösken , Ronald Imbihl
关键词: Inorganic chemistry 、 Platinum 、 Heterogeneous catalysis 、 Electrochemistry 、 Photoemission electron microscopy 、 Catalysis 、 Materials science 、 Working electrode 、 Adsorption 、 Yttria-stabilized zirconia
摘要: The electrochemical promotion of the C(2)H(4)+O(2) reaction to form CO(2) and H(2)O is studied in 10(-5) 10(-4) mbar range with a Pt catalyst interfaced as working electrode yttrium-stabilized zirconia (YSZ). Photoemission electron microscopy (PEEM) was used spatially resolving method. Under open-circuit conditions, that is, without an external voltage applied, production exhibits pronounced hysteresis upon cyclic variation p(C(2)H(4)). attributed build-up carbonaceous CH(x) layer inhibiting O(2) adsorption hence poisoning reaction. It shown application positive potential 1 V triggers transition from unreactive branch active branch. large non-Faradayicity reported literature for this system explained ignition effect caused by partial removal carbonaceaous layer.
sci-hub.se 参考文章(29)
Anthony Kaloyannis, Constantinos G. Vayenas, Non-Faradaic Electrochemical Modification of Catalytic Activity: 12. Propylene Oxidation on Pt☆ Journal of Catalysis. ,vol. 182, pp. 37- 47 ,(1999) , 10.1006/JCAT.1998.2311
Ta-Chin Wei, Jonathan Phillips, Thermal and Catalytic Etching: Mechanisms of Metal Catalyst Reconstruction Advances in Catalysis. ,vol. 41, pp. 359- 421 ,(1996) , 10.1016/S0360-0564(08)60044-9
Carl Wagner, Adsorbed Atomic Species as Intermediates in Heterogeneous Catalysis Advances in Catalysis. ,vol. 21, pp. 323- 381 ,(1970) , 10.1016/S0360-0564(08)60567-2
O. A. Mar'ina, V. A. Sobyanin, The effect of electrochemical oxygen pumping on the rate of CO oxidation on Au electrode-catalyst Catalysis Letters. ,vol. 13, pp. 61- 69 ,(1992) , 10.1007/BF00770948
C. G. Vayenas, S. Bebelis, S. Ladas, Dependence of catalytic rates on catalyst work function Nature. ,vol. 343, pp. 625- 627 ,(1990) , 10.1038/343625A0
V. A. Sobyanin, V. I. Sobolev, V. D. Belyaev, A. K. Demin, O. A. Mar'ina, OXYGEN ISOTOPE EXCHANGE OVER A PT ELECTRODE IN A CELL WITH SOLID OXIDE ELECTROLYTE Reaction Kinetics and Catalysis Letters. ,vol. 47, pp. 327- 331 ,(1992) , 10.1007/BF02137668
M. E. Kordesch, W. Engel, G. John Lapeyre, E. Zeitler, A. M. Bradshaw, The application of photoemission microscopy to the study of heterogeneous reactions over metal single crystal surfaces Applied Physics A. ,vol. 49, pp. 399- 402 ,(1989) , 10.1007/BF00615023
Bjoern Luerßen, Eva Mutoro, Holger Fischer, Sebastian Günther, Ronald Imbihl, Jürgen Janek, In‐situ‐Abbildung elektrochemisch erzeugten Spillover‐Sauerstoffs auf Pt/YSZ‐Katalysatoren Angewandte Chemie. ,vol. 118, pp. 1501- 1504 ,(2006) , 10.1002/ANGE.200503708
M. Makri, C.G. Vayenas, S. Bebelis, K.H. Besocke, C. Cavalca, Atomic resolution STM imaging of electrochemically controlled reversible promoter dosing of catalysts Surface Science. ,vol. 369, pp. 351- 359 ,(1996) , 10.1016/S0039-6028(96)00911-9
Ioannis V. Yentekakis, Alejandra Palermo, Neil C. Filkin, Mintcho S. Tikhov, Richard M. Lambert, In Situ Electrochemical Promotion by Sodium of the Platinum-Catalyzed Reduction of NO by Propene Journal of Physical Chemistry B. ,vol. 101, pp. 3759- 3768 ,(1997) , 10.1021/JP963052C