Role of crystalline defects in electrocatalysis: CO adsorption and oxidation on stepped platinum electrodes as studied by in situ infrared spectroscopy

被引：206

作者：

Lebedeva, NP ^{[1
]}

Rodes, A

Feliu, JM

Koper, MTM

van Santen, RA

机构：

[1] Eindhoven Univ Technol, Schuit Inst Catalysis, Inorgan Chem & Catalysis Lab, NL-5600 MB Eindhoven, Netherlands

[2] Univ Alicante, Dept Quim Fis, E-03080 Alicante, Spain

来源：

JOURNAL OF PHYSICAL CHEMISTRY B | 2002年 / 106卷 / 38期

关键词：

D O I：

10.1021/jp0203806

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 adsorption of CO and the electrochemical oxidation of a CO adlayer on stepped Pt electrodes, Pt(443), Pt(332), and Pt(322), has been studied using in situ infrared reflection-absorption spectroscopy (IRAS). Coverage-dependent and potential-dependent spectra of CO adlayers on stepped Pt surfaces are reported. Infrared spectra acquired during oxidation of the CO adlayer provide information on the mechanism of the reaction and the structure of the operational catalytic active site. CO adsorbed on the (111) terraces is found to be more reactive compared to that adsorbed on either (110) or (100) steps. The step trough of either (110) or (100) step is concluded to be the active site for the electrocatalytic oxidation of the CO adlayer, the most reactive combination involving CO from the terrace and an oxygen-containing species in the step trough.

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页码：9863 / 9872

页数：10

相关论文

共 83 条

[1] THEORETICAL-ANALYSIS OF THE VIBRATIONAL SHIFTS OF CO CHEMISORBED ON PD(100) [J].

BAGUS, PS ;

PACCHIONI, G .

SURFACE SCIENCE, 1990, 236 (03) :233-240

[2] THE ELECTROOXIDATION OF CO - A TEST REACTION IN ELECTROCATALYSIS [J].

BEDEN, B ;

LAMY, C ;

DETACCONI, NR ;

ARVIA, AJ .

ELECTROCHIMICA ACTA, 1990, 35 (04) :691-704

[3] Oxidation of CO adlayers on Pt(111) at low potentials:: an impinging jet study in H2SO4 electrolyte with mathematical modeling of the current transients [J].

Bergelin, M ;

Herrero, E ;

Feliu, JM ;

Wasberg, M .

JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 1999, 467 (1-2) :74-84

[4] COVERAGE-DEPENDENT AND POTENTIAL-DEPENDENT BINDING GEOMETRIES OF CARBON-MONOXIDE AT ORDERED LOW-INDEX PLATINUM AQUEOUS AND RHODIUM AQUEOUS INTERFACES - COMPARISONS WITH ADSORPTION IN CORRESPONDING METAL VACUUM ENVIRONMENTS [J].

CHANG, SC ;

WEAVER, MJ .

SURFACE SCIENCE, 1990, 238 (1-3) :142-162

[5] COVERAGE-DEPENDENT DIPOLE COUPLING FOR CARBON-MONOXIDE ADSORBED AT ORDERED PLATINUM(111)-AQUEOUS INTERFACES - STRUCTURAL AND ELECTROCHEMICAL IMPLICATIONS [J].

CHANG, SC ;

WEAVER, MJ .

JOURNAL OF CHEMICAL PHYSICS, 1990, 92 (07) :4582-4594

[6] INSITU INFRARED-SPECTROSCOPY OF CO ADSORBED AT ORDERED PT(100)-AQUEOUS INTERFACES - DOUBLE-LAYER EFFECTS UPON THE ADSORBATE BINDING GEOMETRY [J].

CHANG, SC ;

WEAVER, MJ .

JOURNAL OF PHYSICAL CHEMISTRY, 1990, 94 (12) :5095-5102

[7] INSITU CHARACTERIZATION OF THE PT(S)-[N(111)X(111)] ELECTRODE SURFACES USING ELECTROSORBED HYDROGEN FOR PROBING TERRACE AND STEP SITES [J].

CLAVILIER, J ;

ELACHI, K ;

RODES, A .

JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 1989, 272 (1-2) :253-261

[8] INSITU PROBING OF STEP AND TERRACE SITES ON PT(S)-[N(111)X(111)] ELECTRODES [J].

CLAVILIER, J ;

ELACHI, K ;

RODES, A .

CHEMICAL PHYSICS, 1990, 141 (01) :1-14

[9] ELECTROCHEMICAL MONITORING OF THE THERMAL REORDERING OF PLATINUM SINGLE-CRYSTAL SURFACES AFTER METALLOGRAPHIC POLISHING FROM THE EARLY STAGE TO THE EQUILIBRIUM SURFACES [J].

CLAVILIER, J ;

ELACHI, K ;

PETIT, M ;

RODES, A ;

ZAMAKHCHARI, MA .

JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 1990, 295 (1-2) :333-356

[10] ELECTROCHEMICAL ADSORPTION BEHAVIOR OF PLATINUM STEPPED SURFACES IN SULFURIC-ACID-SOLUTIONS [J].

CLAVILIER, J ;

ARMAND, D ;

SUN, SG ;

PETIT, M .

JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 1986, 205 (1-2) :267-277

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