Role of the benzene ring in adsorption of aromatic compounds on a platinum electrode

Journal Article · Thu Aug 01 04:00:00 EDT 1985 · Sov. Electrochem. (Engl. Transl.); (United States)

OSTI ID:5330746

Vasil'ev, Yu B; Gorokhova, L T; Maksimov, Kh A

In order to evaluate the role of the substituents and the pi-electrons of the benzene ring in the adsorption behavior of aromatic compounds on platinum in the current work, an investigation was made of the adsorption and electrochemical behavior on a polished platinum electrode of toluene, cyclohexene, and cyclohexane, and a comparative evaluation is given of the basic adsorption parameters of these materials and of benzene on a polished platinum electrode. The method used was rapid cathodic and anodic potentiodynamic pulses. It is shown that in the potential range 0.0-1.0 V there is a stable chemosorption of these materials and that their chemosorbed particles are hydrogenated at potentials below 0.2 V and are oxidized above 1.1 V. The adsorption characteristics conform to processes taking place on uniformly heterogeneous surfaces. It is shown that the nature of the chemosorbed particles of benzene, cyclohexene, and cyclohexane are similar. It was established that the adsorption behavior of aromatic compounds is determined by reaction between the pi-electrons of the benzene ring and surface atoms of the metal. The influence of substituents is secondary and mainly reduces to the appearance of additional steric hindrance.

• Research Organization: Institute of Electrochemistry, Academy of Sciences of the USSR, Moscow
• OSTI ID: 5330746
• Journal Information: Sov. Electrochem. (Engl. Transl.); (United States), Journal Name: Sov. Electrochem. (Engl. Transl.); (United States) Vol. 21:2; ISSN SOECA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400400* -- Electrochemistry
ADSORPTION
ALKANES
ALKENES
ALKYLATED AROMATICS
AROMATICS
BENZENE
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
CHEMISORPTION
CYCLOALKANES
CYCLOHEXANE
ELECTRODES
ELECTRON TRANSFER
ELEMENTS
HEXENES
HYDROCARBONS
HYDROGENATION
KINETICS
METALS
ORGANIC COMPOUNDS
OXIDATION
PLATINUM
PLATINUM METALS
POTENTIOMETRY
REACTION KINETICS
SEPARATION PROCESSES
SORPTION
SORPTIVE PROPERTIES
SURFACE PROPERTIES
TITRATION
TOLUENE
TRANSITION ELEMENTS