Electrocatalytic reduction of some halogenated derivatives of methane and acetic acid at a platinized platinum electrode in acid medium

G. Horányi, K. Torkos

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Abstract

The reduction of CH2Cl2, CHCl3, CCl4, CH3I, ClCH2COOH, Cl2CHCOOH, Cl3CCOOH and ICH2COOH has been studied at a platinized platinum electrode in acidic medium. It has been stated that stationary reduction processes resulting in the splitting of the carbon-halogen bond take place at positive potentials on the rhe scale. Formation of methane was observed in the course of the reduction of halogenated derivatives of methane. The shape of the polarization curves strongly depends upon the nature of the carbon-halogen bond. A maximum appears on the polarization curves obtained for CH2Cl2, ClCH2COOH and Cl2CHCOOH. A general scheme involving loosely and strongly adsorbed species was proposed for explanation of the phenomena observed. It was assumed that the reduction occurs via loosely adsorbed species. An attempt was made to explain the polarization behaviour of the compounds studied on the basis of the simultaneous dependence of adsorption equilibrium and reaction rate upon potential.

Original languageEnglish
Pages (from-to)329-346
Number of pages18
JournalJournal of Electroanalytical Chemistry
Volume140
Issue number2
DOIs
Publication statusPublished - Nov 23 1982

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ASJC Scopus subject areas

  • Analytical Chemistry
  • Chemical Engineering(all)
  • Electrochemistry

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