Adsorption and corrosion properties of platinum at high anodic potentials: aqueous-methanolic solutions of perchloric acid

Journal Article · Thu Jan 01 04:00:00 EST 1987 · Sov. Electrochem. (Engl. Transl.); (United States)

OSTI ID:5760536

Mirkind, L A; Chemodanov, A N; Ashcheulova, I I; Al'bertinskii, G L; Kolotyrkin, Ya M

The methods of radiometry, polarization, and potentiodynamic measurements were used to study the corrosion and electrochemical adsorption behavior of anodically polarized, smooth platinum in aqueous-methanolic (less than or equal to 10 M CH/sub 3/OH) 2 M HClO/sub 4/ solutions at potentials less than or equal to 3.2 V. The laws of methanol adsorption are typical for those on an energetically inhomogeneous surface. The corrosion reaction either is inhibited or accelerated when methanol is added to the solution, the effect depending on electrode potential and on the methanol concentration attained. A similar action is seen with respect to the oxygen evolution reaction. An exponential dependence is found to exit between the rates of these reactions and the coverage of the anode surface by chemisorbed oxygen. The data are interpreted in terms of the concept that the reactions concerned are coupled.

• Research Organization: L.Ya. Karpov Physicochemical Scientific-Research Institute, Moscow, USSR
• OSTI ID: 5760536
• Journal Information: Sov. Electrochem. (Engl. Transl.); (United States), Journal Name: Sov. Electrochem. (Engl. Transl.); (United States) Vol. 22:7; ISSN SOECA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360105 -- Metals & Alloys-- Corrosion & Erosion
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400101 -- Activation
Nuclear Reaction
Radiometric & Radiochemical Procedures
400400* -- Electrochemistry
ALCOHOLS
ANODES
AQUEOUS SOLUTIONS
CATALYSIS
CATALYTIC EFFECTS
CHEMICAL ANALYSIS
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
CHEMISTRY
CORROSION
CORROSION INHIBITORS
CORROSIVE EFFECTS
DISPERSIONS
ELECTROCHEMICAL CORROSION
ELECTROCHEMISTRY
ELECTRODES
ELECTROLYTES
ELEMENTS
HETEROGENEOUS CATALYSIS
HYDROGEN COMPOUNDS
HYDROXY COMPOUNDS
INORGANIC ACIDS
KINETICS
METALS
METHANOL
MIXTURES
ORGANIC COMPOUNDS
PERCHLORIC ACID
PLATINUM
PLATINUM METALS
POLARIZATION
POTENTIOMETRY
QUANTITATIVE CHEMICAL ANALYSIS
RADIOMETRIC ANALYSIS
REACTION KINETICS
SOLUTIONS
SORPTIVE PROPERTIES
SURFACE PROPERTIES
TITRATION
TRANSITION ELEMENTS