The origin of electrochemical promotion in heterogeneous catalysis: photoelectron spectroscopy of solid state electrochemical cells

Article Abstract:

Issues concerning the use of photoelectron spectroscopy to study the performance of dispersed metal catalysts are reported.

Usage, Heterogeneous catalysis, Electrochemistry, Surface chemistry, Photoelectron spectroscopy

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Electrochemical promotion by sodium of the rhodium-catalyzed NO + CO reaction

Article Abstract:

XPS shows that the electropumping of Na to a metallic Rh film contacted with a solid electrolyte (Na beta alumina) under potentiostatic conditions results in reversible spillover of the alkali from the electrolyte to the catalytically active surface. The NO + CO reaction exhibits strong, reversible electrochemical promotion under Na pumping to the rhodium catalyst.

Primary nonferrous metals, not elsewhere classified, Primary Smelting and Refining of Nonferrous Metal (except Copper and Aluminum), All Other Basic Inorganic Chemical Manufacturing, Industrial inorganic chemicals, not elsewhere classified, Sodium, Sodium & Sodium Compounds, Rhodium, Chemical reactions

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Electrochemical promotion of rhodium-catalyzed NO reduction by CO and by propene in the presence of oxygen

Article Abstract:

The effects of alkali-metal modifiers on the catalytic performance of platinum (Pt), copper (Cu) and rhodium (Rh) metal film catalysts and the effects of added oxygen on alkali-metal promotion of NO reduction are studied using electrochemical promotion (EP). Results indicate that the poisoning may be caused due to the alkali-metal inhibition of propene adsorption, excessive formation of Na2O and oxidation of Rh to Rh2O3.

Semiconductors and related devices, Semiconductor and Related Device Manufacturing, Thin Film Materials, Oxidation-reduction reaction, Dielectric films, Oxidation reduction reactions, Alkali metals, Chemical properties

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