Electrochemical Activation of Catalysis : Promotion, Electrochemical Promotion, and Metal-Support Interactions

this Book Describes The Phenomenology, Theory And Potential Applications Of The Phenomenon Of Electrochemical Promotion, Where Electrochemically Induced Ion Spillover Activates And Controls Heterogeneous Catalysis. The Origin Of Electrochemical Promotion Is Discussed In Light Of A Plethora Of Surface Spectroscopic And Electrochemical Techniques. Electrochemical And Classical Promotion Are Compared, Their Common Rules Are Identified And Promotional Kinetics Are Rigorously Modeled And Compared With Experiment. booknews non-faradaic Electrochemical Modification Of Catalytic Activity (nemca, Also Called Electrochemical Promotion) Has Been Demonstrated To Be A General Phenomenon At The Interface Of Catalysis And Electrochemistry Since Its Discovery By Vayenas (u. Of Patras, Greece) In The Early 1980s. Here, He And His Collaborators Explain The Phenomenon And Show Its Relation Not Only To Chemical (classical) Promotion And Spillover, But Also To Metal-support Interactions Of Classical Supported Catalysis. Because Nemca Involves Important Concepts From The Fields Of Catalysis, Surface Science, Electrochemistry, Solid State Ionics, And Chemical Reaction Engineering, The Authors Have Structured The Book So As To Make It Possible For Readers From All Five Fields To Follow The Discussion. After Discussing The Basic Concepts Of Classical Promotion, Chapters Explore Solid Electrolytes And Their Applications In Fuel Cells And Catalysis, The Phenomenology Of Nemca, Nemca's Origin From Surface Science And Electrochemical Techniques, The Concept Of Absolute Electrode Potential Arising From The Phenomenon, The Mechanistic Equivalence Of Electrochemical Promotion And Metal-support Interactions On Ionic And Mixed Conducting Supports, And Recent Advances Towards Practical Applications Of The Science. Annotation C. Book News, Inc., Portland, Or (booknews.com) I knew nothing of the work of C. G. Vayenas on NEMCA until the early nineties. Then I learned from a paper of his idea (gas interface reactions could be catalyzed electrochemically), which seemed quite marvelous; but I did not understand how it worked. Consequently, I decided to correspond with Professor Vayenas in Patras, Greece, to reach a better understanding of this concept. I think that my early papers (1946, 1947, and 1957), on the relationship between the work function of metal surfaces and electron transfer reactions thereat to particles in solution, held me in good stead to be receptive to what Vayenas told me. As the electrode potential changes, so of course, does the work function at the interface, and gas metal reactions there involve adsorbed particles which have bonding to the surface. Whether electron transfer is complete in such a case, or whether the effect is on the desorption of radicals, the work function determines the strength of their bonding, and if one varies the work function by varying the electrode potential, one can vary the reaction rate at the interface. I got the idea. After that, it has been smooth sailing. Dr. Vayenas wrote a seminal article in Modern Aspects of Electrochemistry, Number 29, and brought the field into the public eye. It has since grown and its usefulness in chemical catalytic reactions has been demonstrated and verified worldwide. Annotation This book describes the phenomenology, theory and potentialapplications of the phenomenon of electrochemical promotion, whereelectrochemically induced ion spillover activates and controlsheterogeneous catalysis. The origin of electrochemical promotion isdiscussed in light of a plethora of surface spectroscopic andelectrochemical techniques. Electrochemical and classical promotionare compared, their common rules are identified and promotionalkinetics are rigorously modeled and compared with experiment With these lines M. Faraday summarized his pioneering work on "electrochemical decomposition" and formulated his famous law which quantified and essentially defined the science and basic terminology (Figure 1.1) of electrochemistry.