Oxygen and hydrogen evolution reaction on oriented single crystals of ruthenium dioxide
A novel design for water electrolysis using a solid polymer electrolyte is being developed by General Electric. Ruthenium is one of the best electrocatalysts for the oxygen evolution reaction. There are problems connected with the significant loss in electrocatalytic activity with time. This performance degradation is presumably due to the gradual formation of an RuO/sub 2/ film. We have performed electrochemical measurements on (100), (110) and (111) oriented single crystals of RuO/sub 2/ in order to elucidate the mechanism of the electrocatalytic process. Large single crystals were grown by the vapor transport method. Our investigation has revealed several interesting differences for the various orientations. This study indicates that RuO/sub 3/ may be an important intermediate species prior to oxygen evolution and that the formation of the RuO/sub 3/ is the rate limiting process. Similar results were previously obtained for IrO/sub 2/.
- Research Organization:
- Brooklyn Coll., NY (USA). Dept. of Physics; Brookhaven National Lab., Upton, NY (USA)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- EY-76-C-02-0016
- OSTI ID:
- 5536500
- Report Number(s):
- BNL-27163; CONF-791127-8
- Resource Relation:
- Conference: DOE chemical energy storage and hydrogen energy systems contracts review meeting, Reston, VA, USA, 12 Nov 1979
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
ELECTROCATALYSTS
ELECTROLYTIC CELLS
RUTHENIUM OXIDES
ELECTROCHEMISTRY
CRYSTAL FACES
ELECTROLYSIS
HYDROGEN PRODUCTION
KINETICS
MONOCRYSTALS
OXYGEN
PRODUCTION
WATER
CATALYSTS
CHALCOGENIDES
CHEMISTRY
CRYOGENIC FLUIDS
CRYSTALS
ELEMENTS
FLUIDS
HYDROGEN COMPOUNDS
LYSIS
NONMETALS
OXIDES
OXYGEN COMPOUNDS
RUTHENIUM COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
080101* - Hydrogen- Production- Electrolysis
400400 - Electrochemistry