Electrocatalytic oxidation of methanol on PPy electrode modified by gold using the cementation process

被引：53

作者：

Hammache, H ^{[1
]}

Makhloufi, L ^{[1
]}

Saidani, B ^{[1
]}

机构：

[1] Univ Bejaia, Fac Sci & Sci Ingenieur, Lab Rech Electrochim & Corros, Dept Genie Proc, Bejaia 06000, Algeria

来源：

SYNTHETIC METALS | 2001年 / 123卷 / 03期

关键词：

polypyrrole modified electrode; iron; cementation; gold; electrocatalysis;

D O I：

10.1016/S0379-6779(01)00345-9

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The preparation by the electrochemical cementation process of dispersed gold microparticles on polypyrrole (PPy) coatings on iron surface and their electrocatalytic activity towards methanol oxidation were studied. The reaction of cementation of gold onto Fe/PPy electrode was shown to be under chemical control with a high activation energy. These films were investigated by scanning electron microscopy (SEM), energy-dispersive X-ray analysis (EDX) and cyclic voltammetry. These dispersed Au microparticles exhibit higher electrocatalytic activity than a bare gold electrode towards the electrochemical oxidation of methanol in acidic media. (C) 2001 Elsevier Science B,V All rights reserved.

引用

页码：515 / 522

页数：8

共 32 条

[1] AN INVESTIGATION OF THE OXIDATION OF FORMALDEHYDE ON NOBLE-METAL ELECTRODES IN ALKALINE-SOLUTIONS BY ELECTROCHEMICALLY MODULATED INFRARED-SPECTROSCOPY (EMIRS) [J].

AVRAMOVIVIC, M ;

ADZIC, RR ;

BEWICK, A ;

RAZAQ, M .

JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 1988, 240 (1-2) :161-169

[2] FILMFORMING ELECTROPOLYMERIZATION OF PYRROLE ON IRON IN AQUEOUS OXALIC-ACID [J].

BECK, F ;

MICHAELIS, R ;

SCHLOTEN, F ;

ZINGER, B .

ELECTROCHIMICA ACTA, 1994, 39 (02) :229-234

[3] ELECTRODEPOSITION AND CYCLING OF POLYPYRROLE [J].

BECK, F ;

OBERST, M .

MAKROMOLEKULARE CHEMIE-MACROMOLECULAR SYMPOSIA, 1987, 8 :97-125

[4] EFFICIENT ELECTROCATALYST ASSEMBLIES FOR PROTON AND OXYGEN REDUCTION - THE ELECTROSYNTHESIS AND CHARACTERIZATION OF POLYPYRROLE FILMS CONTAINING NANODISPERSED PLATINUM PARTICLES [J].

BOSE, CSC ;

RAJESHWAR, K .

JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 1992, 333 (1-2) :235-256

[5] POSSIBLE IMPORTANCE OF ANIONS IN BOTH THE BINDING OF LEWIS-BASES AND THE ELECTROCATALYTIC OXIDATION OF DISSOLVED ORGANICS AT GOLD ELECTRODES IN AQUEOUS-MEDIA [J].

BURKE, LD ;

CUNNANE, VJ .

JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 1986, 210 (01) :69-94

[6] THE IMPORTANCE OF SUPERFICIAL (ADATOM) SURFACE OXIDATION IN THE ELECTROCATALYTIC BEHAVIOR OF NOBLE-METALS IN AQUEOUS-MEDIA [J].

BURKE, LD ;

OLEARY, WA .

JOURNAL OF APPLIED ELECTROCHEMISTRY, 1989, 19 (05) :758-767

[7] APPLICATION OF THE HYDROUS OXIDE MEDIATION MODEL OF ELECTROCATALYSIS TO REACTIONS AT NOBLE-METAL ANODES IN BASE .2. AU, RU AND IR [J].

BURKE, LD ;

ODWYER, KJ .

ELECTROCHIMICA ACTA, 1990, 35 (11-12) :1829-1835

[8] THE REDUCTION OF DIOXYGEN AND THE OXIDATION OF HYDROGEN AT POLYPYRROLE FILM ELECTRODES CONTAINING NANODISPERSED PLATINUM PARTICLES [J].

CHEN, CC ;

BOSE, CSC ;

RAJESHWAR, K .

JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 1993, 350 (1-2) :161-176

[9] ANODIC-OXIDATION OF IMPURE H-2 AN TEFLON-BONDED PT-RU/WO3/C ELECTRODES [J].

CHEN, KY ;

SHEN, PK ;

TSEUNG, ACC .

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 1995, 142 (10) :L185-L187

[10] Electropolymerization of pyrrole in aqueous solution on galvanized steel sheet [J].

DeBruyne, A ;

Delplancke, JL ;

Winand, R .

JOURNAL OF APPLIED ELECTROCHEMISTRY, 1997, 27 (07) :867-869

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