ELECTROCHEMICAL OXIDATION OF ETHANOL ON PT(HKL) BASAL SURFACES IN NAOH AND NA2CO3 MEDIA

被引：24

作者：

LOPEZATALAYA, M ^{[1
]}

MORALLON, E ^{[1
]}

CASES, F ^{[1
]}

VAZQUEZ, JLK ^{[1
]}

PEREZ, JM ^{[1
]}

机构：

[1] UNIV POLITECN VALENCIA,EUITI ALCOY,DEPT INGN TEXT,E-03800 ALCOY,SPAIN

来源：

JOURNAL OF POWER SOURCES | 1994年 / 52卷 / 01期

关键词：

ETHANOL; PLATINUM; ALKALINE MEDIA; ELECTRODES;

D O I：

10.1016/0378-7753(94)01950-9

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The electrooxidation of ethanol as well as its irreversible adsorption on platinum single crystal electrodes have been studied in NaOH and Na2CO3 media. Pt(100) and Pt(100) electrodes show deactivation for oxidation of bulk ethanol in both media, caused mainly by a structural surface modification of the electrode surface. However, in NaOH solution Pt(111) exhibits the best behaviour on ethanol oxidation showing the highest current density and the most stable surface. From the SNIFT-IR spectra adsorbed CO is the main poisoning species in the irreversible adsorption of ethanol on Pt(110) and Pt(100); on Pt(111) only a very weak band of adsorbed CO is observed. From the FT-IR spectra obtained during the oxidation of ethanol on Pt(110), Pt(100) and Pt(111) electrodes, acetate anions have been identified as the main soluble oxidation product.

引用

页码：109 / 117

页数：9

共 25 条

[1] INSITU ANALYSIS BY INFRARED REFLECTANCE SPECTROSCOPY OF THE ADSORBED SPECIES RESULTING FROM THE ELECTROSORPTION OF ETHANOL ON PLATINUM IN ACID-MEDIUM [J].

BEDEN, B ;

MORIN, MC ;

HAHN, F ;

LAMY, C .

JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 1987, 229 (1-2) :353-366

[2]

BEDEN B, 1992, MOD ASPECTS ELECTROC, V22

[3] INTERMEDIATES AND PRODUCTS OF ETHANOL OXIDATION ON PLATINUM IN ACID-SOLUTION [J].

BITTINSCATTANEO, B ;

WILHELM, S ;

CATTANEO, E ;

BUSCHMANN, HW ;

VIELSTICH, W .

BERICHTE DER BUNSEN-GESELLSCHAFT-PHYSICAL CHEMISTRY CHEMICAL PHYSICS, 1988, 92 (11) :1210-1218

[4] VOLTAMMETRIC BEHAVIOR IN PERCHLORIC-ACID OF ADSORBED RESIDUES FORMED AT OPEN CIRCUIT FROM THE ADSORPTION OF ACETALDEHYDE AND ETHANOL ON A PT(111) ELECTRODE [J].

CASES, F ;

VAZQUEZ, JL ;

PEREZ, JM ;

ALDAZ, A .

JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 1991, 310 (1-2) :403-415

[5]

CASES F, 1990, J ELECTROANAL CHEM, V278, P443

[6] STUDIES OF ADSORBED SATURATED ALCOHOLS AT PT(111) ELECTRODES BY VIBRATIONAL SPECTROSCOPY (EELS), AUGER-SPECTROSCOPY, AND ELECTROCHEMISTRY [J].

GAO, P ;

LIN, CH ;

SHANNON, C ;

SALAITA, GN ;

WHITE, JH ;

CHAFFINS, SA ;

HUBBARD, AT .

LANGMUIR, 1991, 7 (07) :1515-1524

[7] ON THE ADSORPTION AND OXIDATION OF ETHANOL ON PLATINUM AS STUDIED WITH INSITU IR SPECTROSCOPY [J].

HOLZE, R .

JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 1988, 246 (02) :449-455

[8] A SNIFTIRS STUDY OF ETHANOL OXIDATION ON PLATINUM [J].

IWASITA, T ;

RASCH, B ;

CATTANEO, E ;

VIELSTICH, W .

ELECTROCHIMICA ACTA, 1989, 34 (08) :1073-1079

[9] THE ELECTROCHEMICAL OXIDATION OF ETHANOL ON PLATINUM - A SNIFTIRS STUDY [J].

IWASITA, T ;

VIELSTICH, W .

JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 1988, 257 (1-2) :319-324

[10] REAL-TIME FTIR SPECTROSCOPY AS AN ELECTROCHEMICAL MECHANISTIC PROBE - ELECTROOXIDATION OF ETHANOL AND RELATED SPECIES ON WELL-DEFINED PT(111) SURFACES [J].

LEUNG, LWH ;

CHANG, SC ;

WEAVER, MJ .

JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 1989, 266 (02) :317-336

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