Electrochemical promotion of catalysis: mechanistic investigations and monolithic electropromoted reactors

Tsiplakides, D.; Balomenou, Stella; Katsaounis, Alexandros; Archonta, D.; Koutsodontis, C.; Vayenas, C.G.

doi:10.1016/j.cattod.2004.12.015

Cited by 38 publications

(44 citation statements)

References 39 publications

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“…A major thrust was realized through the confirmation of the feasibility of electropromotion of thin sputtered metal films [19,20] and the development of the monolithic electrochemically promoted reactor, MEPR [4,20]. Sputtered metal films on un-treated YSZ surfaces, with a thickness of 40-50 nm, were reported to have a metal dispersion higher than 10-20% [20], which is comparable to that of state-ofthe-art conventional supported catalysts.…”

Section: Introductionmentioning

confidence: 94%

“…The reactor concept and design ( Fig. 1) has been described in detail elsewhere [4,20,21]. In brief, the core of the MEPR is a ceramic casing, made of machinable glass ceramic (Macor ÒTM , [20,21]).…”

Section: Mep Reactor Design and Constructionmentioning

confidence: 99%

“…The electropromoted reactor has already been evaluated successfully for hydrocarbon oxidation and NO reduction by C 2 H 4 in the presence of O 2 using both conventional thick films and thin sputtered noble metal electrodes [4,[20][21][22]. It was also tested for the treatment of automotive exhaust gas of a real diesel engine [22] demonstrating excellent mechanical and thermal stability after prolonged operation.…”

Section: Introductionmentioning

confidence: 98%

“…There exist shorter [4,6,14,15] as well as more detailed recent reviews [3,5] describing the phenomenology, limits and molecular origin of the phenomenon. Electrochemical promotion has been studied extensively for more than 15 years almost exclusively in research laboratories but there is also a strong industrial interest and involvement aiming at commercialization.…”

Section: Introductionmentioning

confidence: 99%

“…The electrochemical promotion of catalysis (non-Faradaic electrochemical modification of catalytic activity, NEMCA effect) refers to the very pronounced and reversible changes in the catalytic properties of conductive catalysts deposited on solid electrolytes caused by application of small electrical currents or potentials [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18]. There exist shorter [4,6,14,15] as well as more detailed recent reviews [3,5] describing the phenomenology, limits and molecular origin of the phenomenon.…”

Section: Introductionmentioning

confidence: 99%

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Tailor-structured skeletal Pt catalysts employed in a monolithic electropromoted reactor

et al. 2008

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The performance of a monolithic electropromoted reactor was investigated under high gas flow rates, for the oxidation of ethylene utilizing thin (40 nm) tailorstructured highly porous skeletal Pt catalyst-electrodes coated on Y 2 O 3 -stabilized-ZrO 2 (YSZ). Electrochemical enhancement was observed at gas flow rates as high as 25 L min -1 and mean gas residence times as low as 0.15 s. This is a promising step for the practical utilization of the electrochemical promotion of catalysis. An interesting feature of the skeletal Pt catalyst-electrodes is the appearance of a sharp rate maximum upon anodic current interruption which appears to be related to their dendritic structure and enhanced capacity for promoter storage.

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Section: Introductionmentioning

confidence: 94%

Section: Mep Reactor Design and Constructionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Tailor-structured skeletal Pt catalysts employed in a monolithic electropromoted reactor

et al. 2008

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Electrochemical Modification of Catalytic Activity

Vayenas

Katsaounis

Brosda

et al. 2008

Handbook of Heterogeneous Catalysis

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The sections in this article are Introduction Catalytic and Electrocatalytic Kinetics Solid Electrolytes Solid Electrolyte Potentiometry ( SEP ) Electrocatalytic Operation of Solid Electrolyte Cells Electrochemical Promotion of Catalysis Selectivity Modification and Promotional Effects on Chemisorption Selectivity Modification Promotional Effects on Chemisorption Basic Questions Origin of Electrochemical Promotion Magnitude of Electrochemical Promotion and the Sacrificial Promoter Mechanism Mechanism of Metal–Support Interactions Interrelation of Promotion, Electrochemical Promotion and Metal–Support Interactions: the Double‐Layer Model of Catalysis Why the “New” Supports? Double‐Layer Approach to Catalysis Why Double Layer? Rationalization and Prediction of Desired Types of Promoters and Supports The Four Types of Rate–Work Function Dependence and the Promotional Rules Double‐Layer Isotherms and Kinetics Electropromotion of Thin Films and Electropromoted Monolithic Reactors Summary and Perspectives Outlook

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Electrocatalysis

Katsaounis

Brosda

Vayenas

2007

Encyclopedia of Electrochemistry

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The sections in this article are Introduction Adsorption Basic Electrokinetic Principles and Experimental Techniques Electrokinetic and Mass‐transport Control The Measurement of IR ‐free Electrocatalyst Overpotential Cyclic Voltammetry AC ‐impedance Spectroscopy Normalization of Active Surface Theory of Electrocatalysis Overpotentials and the Butler–Volmer Equation Volcano Plots Transition State Approaches Quantum Mechanics–based Models Promotional Effects The Hydrogen Oxidation/Evolution Reaction Oxygen Reduction/Evolution Reaction Oxidation of Small Organic Molecules Other Important Electrocatalytic Systems Electrochemical Promotion of Catalytic Reactions Promotional Rules in Catalytic and Electrocatalytic Systems Concluding Remarks

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Electrochemical promotion of catalysis: mechanistic investigations and monolithic electropromoted reactors

Cited by 38 publications

References 39 publications

Tailor-structured skeletal Pt catalysts employed in a monolithic electropromoted reactor

Tailor-structured skeletal Pt catalysts employed in a monolithic electropromoted reactor

Electrochemical Modification of Catalytic Activity

Electrocatalysis

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