Periodic variations of overvoltages for water electrolysis in acid solutions from cyclic voltametric studies. [31 metals as electrocatalysts]
Cyclic voltammetry was used to determine the electrocatalytic activities of 31 metals for the hydrogen and oxygen evolution reaction in 0.1M H/sub 2/SO/sub 4/ at 80/sup 0/C. For the hydrogen evolution reaction, properties of the metals such as electronic structures, work functions, and metal-hydrogen bond strengths tend to correlate with the observed electrocatalytic activities. The best electrocatalysts for the hydrogen evolution reaction in the order of decreasing catalytic activity are Pd greater than Pt approximately equal to Rh greater than Ir greater than Re greater than Os approximately equal to Ru greater than Ni. For the oxygen evolution reaction, the order of catalytic activity is Ir approximately equal to Ru greater than Pd greater than Rh greater than Pt greater than Au greater than Nb. Most other metals undergo anodic corrosion and cannot be used for the evolution of oxygen in acid solutions. The potentials at which corrosion is observed are presented for these metals.
- Research Organization:
- Middle Tennessee State Univ., Murfreesboro
- OSTI ID:
- 7143661
- Journal Information:
- J. Electrochem. Soc.; (United States), Journal Name: J. Electrochem. Soc.; (United States) Vol. 123:10; ISSN JESOA
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
080101* -- Hydrogen-- Production-- Electrolysis
ANTIMONY
BISMUTH
CADMIUM
CATALYTIC EFFECTS
CHROMIUM
COBALT
COPPER
ELECTROLYSIS
ELEMENTS
GOLD
HAFNIUM
HYDROGEN COMPOUNDS
HYDROGEN PRODUCTION
INDIUM
IRIDIUM
IRON
LEAD
LYSIS
MANGANESE
MERCURY
METALS
MOLYBDENUM
NICKEL
NIOBIUM
OSMIUM
OXYGEN COMPOUNDS
PALLADIUM
PLATINUM
PLATINUM METALS
REFRACTORY METALS
RHENIUM
RHODIUM
RUTHENIUM
SILVER
TANTALUM
TIN
TITANIUM
TRANSITION ELEMENTS
TUNGSTEN
VANADIUM
VOLTAMETRY
WATER
ZINC
ZIRCONIUM