Kinetics of electrogenerative hydrogenation over platinum black electrocatalyst

Journal Article · Mon Dec 01 04:00:00 EST 1975 · J. Electrochem. Soc.; (United States)

DOI:https://doi.org/10.1149/1.2134080· OSTI ID:7188468

Langer, S H; Sakellaropoulos, G P

The kinetics of the electrocatalytic hydrogenation of ethylene at positive potentials has been studied over polytetrafluoroethylene-bonded, porous platinum black electrodes in perchloric acid electrolyte. Pore diffusion was generally not a significant factor except at low concentrations of reactants. Steady-state kinetic parameters and deuterium exchange results suggest that surface reaction of hydrogen with ethyl radicals is rate limiting. A mechanistic model is proposed and examined in terms of Temkin adsorption of hydrogen atoms in the low potential region (less than 0.18 V). Strong Langmuir adsorption of ethylene appears to take place for all mechanisms considered. The energy production of the electrogenerative reactor is favored by high electrolyte concentration, high alkene partial pressure, elevated temperatures, and increased catalytic loading.

• Research Organization: Univ. of Wisconsin, Madison
• OSTI ID: 7188468
• Journal Information: J. Electrochem. Soc.; (United States), Journal Name: J. Electrochem. Soc.; (United States) Vol. 122:12; ISSN JESOA
• Country of Publication: United States
• Language: English

Related Subjects

30 DIRECT ENERGY CONVERSION
300505* -- Fuel Cells-- Electrochemistry
Mass Transfer & Thermodynamics
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400400 -- Electrochemistry
ADSORPTION
ALKENES
CATALYSIS
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
CHEMISTRY
CRYOGENIC FLUIDS
DIRECT ENERGY CONVERTERS
ELECTROCHEMICAL CELLS
ELECTROCHEMISTRY
ELEMENTS
ETHYLENE
FLUIDS
FUEL CELLS
HYDROCARBON FUEL CELLS
HYDROCARBONS
HYDROGEN
HYDROGEN COMPOUNDS
HYDROGENATION
INORGANIC ACIDS
KINETICS
METALS
NONMETALS
ORGANIC COMPOUNDS
PERCHLORIC ACID
PLATINUM
PLATINUM METALS
REACTION KINETICS
SORPTION
TRANSITION ELEMENTS