Electrode passivation caused by polymerization of different phenolic compounds

Abstract An electrochemical quartz crystal microbalance (EQCM) was used to investigate the formation of polymeric products resulting from electrooxidation in aqueous solutions of phenolic compounds on the surface of Au and Pt electrodes. The studied compounds were phenol; m -cresol; 2,5-dimethylphenol and 2,3,5-trimethylphenol. The polymerization process was studied as a function of the methyl substitution in the phenolic structure. Electrochemical quartz crystal microbalance studies show that the polymer formed from substituted phenols is more passivating than that from the non-substituted phenol. In any case, the largest amount of mass was deposited during the first voltammetric cycle and the Pt electrode was more active than the Au electrode for the organic electrooxidation process. FT-IR spectroscopy showed that the films formed upon phenol and m -cresol electrolysis were also oxidized.

[1]  Z. Jusys,et al.  Electropolymerization of chlorinated phenols on a Pt electrode in alkaline solution. Part II: An electrochemical quartz crystal microbalance study , 2002 .

[2]  M. Gattrell,et al.  A Fourier Transform Infrared Spectroscopy Study of the Passive Film Produced during Aqueous Acidic Phenol Electro‐oxidation , 1992 .

[3]  D. Buttry,et al.  Determination of ion populations and solvent content as functions of redox state and pH in polyaniline , 1987 .

[4]  M. C. Diez,et al.  Electro-oxidation of chlorophenols at a gold electrode , 2001 .

[5]  R. Torresi,et al.  Calibration of the Electrochemical Quartz Crystal Microbalance , 1991 .

[6]  A. Wiȩckowski,et al.  Radioactive-labeling study of sulfate/bisulfate adsorption on smooth gold electrodes , 1990 .

[7]  R. Torresi,et al.  Ionic Exchange Phenomena Related to the Redox Processes of Polyaniline in Nonaqueous Media , 2000 .

[8]  M. Musiani,et al.  An Overview of Phenol Electropolymerization for Metal Protection , 1987 .

[9]  Allen J. Bard,et al.  Encyclopedia of Electrochemistry of the Elements , 1978 .

[10]  Z. Jusys,et al.  Electropolymerization of chlorinated phenols on a Pt electrode in alkaline solution Part I: A cyclic voltammetry study , 2001 .

[11]  Z. Jusys,et al.  Oxidation of chlorophenols on Pt electrode in alkaline solution studied by cyclic voltammetry, galvanostatic electrolysis, and gas chromatographymass spectrometry , 2001 .

[12]  G. Inzelt Characterization of modified electrodes by electrochemical quartz crystal microbalance, radiotracer technique and impedance spectroscopy , 1995 .

[13]  C. Pulgarin,et al.  Anodic oxidation of phenol for waste water treatment , 1991 .

[14]  A. Watkinson,et al.  Anodic oxidation of phenol for waste water treatment , 1980 .

[15]  M. Gattrell,et al.  The electrochemical oxidation of aqueous phenol at a glassy carbon electrode , 1990 .

[16]  Jaeyoung Lee,et al.  Electrodeposition of PbO2 onto Au and Ti substrates , 2000 .

[17]  R. Torresi,et al.  Study of Charge Compensation During the Redox Process of Self-Doped Polyaniline in Aqueous Media , 2000 .

[18]  James S. Gordon,et al.  Application of an electrochemical quartz crystal microbalance to a study of water adsorption at gold surfaces in acidic media , 1994 .

[19]  Z. Jusys,et al.  ELECTROCHEMICAL QUARTZ CRYSTAL MICROGRAVIMETRY OF GOLD IN PERCHLORIC AND SULFURIC ACID SOLUTIONS , 1999 .

[20]  M. Gattrell,et al.  A Study of the Oxidation of Phenol at Platinum and Preoxidized Platinum Surfaces , 1993 .

[21]  P. Iotov,et al.  Mechanistic approach to the oxidation of phenol at a platinum/gold electrode in an acid medium , 1998 .

[22]  Joseph Wang,et al.  Electrochemical quartz crystal microbalance investigation of surface fouling due to phenol oxidation , 1998 .

[23]  W. Kautek,et al.  In-situ-monitoring of electrochemical double layer structure changes at gold with a phase-controlled quartz microbalance , 1995 .

[24]  G. Tremiliosi‐Filho,et al.  Limit to extent of formation of the quasi-two-dimensional oxide state on Au electrodes , 1997 .

[25]  M. Gattrell,et al.  A Study of Electrode Passivation during Aqueous Phenol Electrolysis , 1993 .

[26]  S. Gottesfeld,et al.  Ellipsometric study of the polymeric surface films formed on platinum electrodes by the electrooxidation of phenolic compounds , 1980 .

[27]  Z. Jusys,et al.  Electropolymerization of chlorinated phenols on a Pt electrode in alkaline solution. Part IV: A gas chromatography mass spectrometry study , 2002 .

[28]  Z. Jusys,et al.  Electropolymerization of chlorinated phenols on a Pt electrode in alkaline solution Part III: A Fourier transformed infrared spectroscopy study , 2002 .

[29]  M. Musiani,et al.  Phenol electropolymerization: a straight route from monomers to polymer coatings , 1994 .

[30]  F. Nart,et al.  New results on the adsorption of sulfate species at polycrystalline gold electrodes. An in situ FTIR study , 1996 .

[31]  Andrzej Wieckowski,et al.  Interfacial Electrochemistry: Theory: Experiment, and Applications , 1999 .

[32]  G. Sauerbrey,et al.  Messung von Plattenschwingungen sehr kleiner Amplitude durch Lichtstrommodulation , 1964 .

[33]  Allen J. Bard,et al.  Electroanalytical Chemistry: A Series of Advances , 1974 .

[34]  Osvaldo N. Oliveira,et al.  In situ thickness measurements of ultra-thin multilayer polymer films by atomic force microscopy , 1999 .

[35]  Roberto M. Torresi,et al.  Técnicas in situ de baixo custo em eletroquímica: a microbalança a cristal de quartzo , 2000 .