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XPS, SEM and electrochemical characterization of a platinum‐based glassy carbon modified electrode. Electrocatalytic oxidation of ethanol in acidic medium
Author(s) -
Casella Innocenzo G.,
Desimoni Elio
Publication year - 1996
Publication title -
electroanalysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 128
eISSN - 1521-4109
pISSN - 1040-0397
DOI - 10.1002/elan.1140080509
Subject(s) - platinum , glassy carbon , electrochemistry , x ray photoelectron spectroscopy , scanning electron microscope , inorganic chemistry , electrode , polarization (electrochemistry) , materials science , chemistry , cyclic voltammetry , nuclear chemistry , catalysis , chemical engineering , organic chemistry , composite material , engineering
A platinum‐based chemically modified glassy carbon electrode (Pt‐CME) was characterized in acidic medium by X‐ray photoelectron spectroscopy, scanning electron microscopy and electrochemical techniques. A uniform distribution of platinum microparticles of different form and size (hexagonal, grain‐like and globular) was present on the surface of glassy carbon. The chemical species present on the electrode surface changed upon polarization. At higher potential values (1.5 V) species such Pt(OH) 2 , Pt(OH) ads and Pt(OH) 4 formed at lower potential values were transformed into PtO, PtO ads and PtO 2 respectively. A few aspects of the electrooxidation of ethanol in acidic medium were investigated on the Pt‐CME described.