Electrochemical generation of oxygen. 1. The effects of anions and cations on hydrogen chemisorption and anodic oxide film formation on platinum electrode. 2. The effects of anions and cations on oxygen generation on platinum electrode. Final report, 1 Sep 1972--31 Aug 1975

Technical Report · Fri Aug 01 00:00:00 EDT 1975

OSTI ID:7307337

Huang, C J; Yeager, E; Ogrady, W E

The effects were studied of anions and cations on hydrogen chemisorption and anodic oxide film formation on Pt by linear sweep voltammetry, and on oxygen generation on Pt by potentiostatic overpotential measurement. The hydrogen chemisorption and anodic oxide film formation regions are greatly influenced by anion adsorption. In acids, the strongly bound hydrogen occurs at more cathodic potential when chloride and sulfate are present. Sulfate affects the initial phase of oxide film formation by produced fine structure while chloride retards the oxide-film formation. In alkaline solutions, both strongly and weakly bound hydrogen are influenced by iodide, cyanide, and barium and calcium cations. These ions also influence the oxide film formation. Factors considered to explain these effects are discussed. The Tafel slope for oxygen generation was found to be independent on the oxide thickness and the presence of cations or anions. The catalytic activity indicated by the exchange current density was observed decreasing with increasing oxide layer thickness, only a minor dependence on the addition of certain cations and anions was found. (Author) (GRA)

• Research Organization: Case Western Reserve Univ., Cleveland, OH (USA). Electrochemistry Research Lab.
• DOE Contract Number: NGR-36-027-052
• OSTI ID: 7307337
• Report Number(s): N-76-25362; NASA-CR-148138
• Country of Publication: United States
• Language: English

Related Subjects

08 HYDROGEN
37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
HYDROGEN
CHEMISORPTION
HYDROGEN PRODUCTION
OXYGEN
PRODUCTION
WATER
ELECTROLYSIS
CATALYTIC EFFECTS
ELECTROCHEMISTRY
IONS
PLATINUM
CHARGED PARTICLES
CHEMICAL REACTIONS
CHEMISTRY
CRYOGENIC FLUIDS
ELEMENTS
FLUIDS
HYDROGEN COMPOUNDS
LYSIS
METALS
NONMETALS
OXYGEN COMPOUNDS
PLATINUM METALS
SEPARATION PROCESSES
SORPTION
TRANSITION ELEMENTS
080101* - Hydrogen- Production- Electrolysis
400400 - Electrochemistry