Kinetics of hydrogen production from methyl viologen radicals on colloidal platinum

Journal Article · Thu Feb 03 04:00:00 EST 1983 · J. Phys. Chem.; (United States)

DOI:https://doi.org/10.1021/j100226a008· OSTI ID:5919266

Matheson, M S ^[1]; Lee, P C; Meisel, D; Pelizzetti, E

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1. Argonne National Lab., IL

The kinetics of hydrogen evolution from colloidal Pt catalyst reacting with methyl viologen radicals was studied in detail and the results are compared with those in previous studies of the same reaction catalyzed by gold sols. The major difference between the two catalysts is in the rate of the proton discharge step. In the Pt-catalyzed reaction this step follows immediately the electron transfer reaction from the reductant to the particle. The Pt particle may therefore be viewed as a storage pool of hydrogen atoms rather than electrons. The dependence of the rate on catalyst concentration in Pt, as well as in Au, is second order in the catalyst and the possibility of a particle-particle reaction is further examined.

• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 5919266
• Journal Information: J. Phys. Chem.; (United States), Journal Name: J. Phys. Chem.; (United States) Vol. 87:3; ISSN JPCHA
• Country of Publication: United States
• Language: English

Related Subjects

08 HYDROGEN
080106* -- Hydrogen-- Production-- Biosynthesis & Photochemical Processes
14 SOLAR ENERGY
140505 -- Solar Energy Conversion-- Photochemical
Photobiological
& Thermochemical Conversion-- (1980-)
ACETONE
ALCOHOLS
CATALYTIC EFFECTS
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
COLLOIDS
DECOMPOSITION
DISPERSIONS
ELECTRON TRANSFER
ELEMENTS
HYDROGEN COMPOUNDS
HYDROGEN PRODUCTION
HYDROXY COMPOUNDS
KETONES
KINETICS
METALS
ORGANIC COMPOUNDS
OXYGEN COMPOUNDS
PH VALUE
PHOTOCHEMICAL REACTIONS
PHOTOLYSIS
PLATINUM
PLATINUM METALS
PROPANOLS
PULSE TECHNIQUES
REACTION INTERMEDIATES
REACTION KINETICS
SPECTRA
TRANSITION ELEMENTS
ULTRAVIOLET SPECTRA
VISIBLE SPECTRA
WATER