Electrochemical behaviour of platinum in hydrogen peroxide solution (1963)
Creators
- 1. Commisariat a l'Energie Atomique, Grenoble (France). Centre d'Etudes Nucleaires
Description
The relative stability of hydrogen peroxide in aqueous solution at 25 deg. C, allows its amperometric determination from the theory, using either its cathodic reduction or its anodic oxidation. The cathodic reduction yields a wave on a platinum electrode only when some oxygen is present in the solution. It cannot, therefore, be used for electrochemical determination. On the other hand, the anodic oxidation on platinum produces a wave which might be used. However, a passivation of platinum occurs at the same time. This passivation process is studied by means of potentio-kinetic, potentio-static, intensio-static curves and of pH measurements in the vicinity of the anode. A mechanism for passivation is presented, which takes into account the role of hydrogen peroxide as a reducing agent. This passivation rules out any analytical application of the oxidation reaction of hydrogen peroxide. (author)
Abstract (French)
La stabilite relative de l'eau oxygenee en solution aqueuse a 25 deg. C permet d'envisager theoriquement son dosage par amperometrie, en utilisant soit sa reduction cathodique, soit son oxydation anodique. La reduction cathodique ne donne lieu a une vague sur electrode de platine qu'en presence d'oxygene dissous. Il n'est donc pas utilisable pour un dosage. L'oxydation anodique sur platine donne une vague theoriquement utilisable mais s'accompagne d'une passivation du platine. Le processus de la passivation est etudie au moyen des courbes potentiocinetiques, potentiostatiques, intensiostatiques et par une mesure des variations de pH au voisinage de l'anode. On propose un mecanisme de passivation en tenant compte du role activant de l'eau oxygenee. Cette passivation interdit toute application analytique de la reaction d'oxydation de l'eau oxygenee. (auteur)Files
52011239.pdf
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Additional details
Additional titles
- Original title (French)
- Comportement electrochimique du platine en solution d'eau oxygene (1963)
Publishing Information
- Imprint Pagination
- 68 p.
- Report number
- CEA-R--2334
INIS
- Country of Publication
- France
- Country of Input or Organization
- France
- INIS RN
- 52011239
- Subject category
- S37: INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY;
- Resource subtype / Literary indicator
- Thesis
- Descriptors DEI
- AMPEROMETRY; AQUEOUS SOLUTIONS; CHEMICAL REACTION KINETICS; ELECTROCHEMICAL CORROSION; ELECTROCHEMISTRY; HYDROGEN PEROXIDE; PASSIVATION; PLATINUM; RADIOLYSIS; REACTOR MONITORING SYSTEMS
- Descriptors DEC
- CHEMICAL ANALYSIS; CHEMICAL RADIATION EFFECTS; CHEMICAL REACTIONS; CHEMISTRY; CORROSION; DECOMPOSITION; DISPERSIONS; ELEMENTS; HOMOGENEOUS MIXTURES; HYDROGEN COMPOUNDS; KINETICS; METALS; MIXTURES; OXYGEN COMPOUNDS; PEROXIDES; PLATINUM METALS; QUANTITATIVE CHEMICAL ANALYSIS; RADIATION EFFECTS; REACTION KINETICS; SOLUTIONS; TITRATION; TRANSITION ELEMENTS; VOLUMETRIC ANALYSIS
Optional Information
- Notes
- 48 refs.; Available from the INIS Liaison Officer for France, see the INIS website for current contact and E-mail addresses; This record replaces 37118144