Electrodeposition of nickel and cobalt oxides onto platinum and graphite electrodes for alkaline water electrolysis
Smooth, compact, and bright films of nickel and cobalt oxides were prepared from 0.5M acetate aqueous solutions and electrodeposited onto platinum and graphite electrodes. Oxygen evolution potentials in 1M NaOH at room temperature were about 150-170 mV lower on nickel(III) oxide (NiO(OH)) and cobalt(III) oxide (Co/sub 2/O/sub 3/) coated anodes than on bare anodes. Scanning electron micrographs of NiO(OH) deposits showed no morphological change after extensive electrolysis, and electrocatalytic activity was stable in long-term controlled-potential coulometric electrolysis. However, the electrocatalytic activity of Co/sub 2/O/sub 3/ showed initial decay followed by a fairly constant behavior. No visible change in the surface of the Co/sub 2/O/sub 3/ deposit was observed after extensive electrolysis.
- Research Organization:
- Solar Energy Research Institute, Golden, Colorado
- OSTI ID:
- 6286407
- Journal Information:
- J. Electrochem. Soc.; (United States), Vol. 131:6
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
COBALT OXIDES
ELECTRODEPOSITION
GRAPHITE
ELECTROCHEMICAL COATING
NICKEL OXIDES
PLATINUM
CATALYTIC EFFECTS
ELECTROCATALYSTS
ELECTRODES
ELECTROLYSIS
MORPHOLOGY
SCANNING ELECTRON MICROSCOPY
CARBON
CATALYSTS
CHALCOGENIDES
CHEMICAL COATING
COBALT COMPOUNDS
DEPOSITION
ELECTRON MICROSCOPY
ELEMENTAL MINERALS
ELEMENTS
LYSIS
METALS
MICROSCOPY
MINERALS
NICKEL COMPOUNDS
NONMETALS
OXIDES
OXYGEN COMPOUNDS
PLATINUM METALS
SURFACE COATING
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS
080101* - Hydrogen- Production- Electrolysis