Fourier Transform Infrared Spectroscopy Study of CO Electro-oxidation on Pt(111) in Alkaline Media

被引：57

作者：

Garcia, G. ^{[1
]}

Rodriguez, P. ^{[1
]}

Rosca, V. ^{[1
]}

Koper, M. T. M. ^{[1
]}

机构：

[1] Leiden Univ, Leiden Inst Chem, NL-2300 RA Leiden, Netherlands

来源：

LANGMUIR | 2009年 / 25卷 / 23期

关键词：

SINGLE-CRYSTAL ELECTRODES; CARBON-MONOXIDE; IN-SITU; ELECTROCHEMICAL OXIDATION; ADSORBED CO; PLATINUM; ADSORPTION; SURFACE; MECHANISM; SENSITIVITY;

D O I：

10.1021/la902251z

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

In this work we investigate the electro-oxidation of CO on Pt(111) in alkaline solution by using Fourier transform infrared spectroscopy (FTIRS), to determine the adsorption sites of the CO, the intermediate species and the final oxidation product as a function of the applied potential. Multiple CO vibration bands (on-top, bridge and 3-fold hollow site) are observed on the Pt(111) electrode, their distribution and potential dependence being strongly dependent on the surface treatment. Spectroscopic results show that the Final reaction product is carbonate and suggest that adsorbed carbonate blocks the access of CO from the (111) terrace to the active sites (i.e., step and kink sites).

引用

页码：13661 / 13666

页数：6

共 29 条

[1]

[Anonymous], 1980, INFRARED CHARACTERIS

[2] Characterization of the adsorption state of carbonate ions at the Au(111) electrode surface using in situ IRAS [J].

Arihara, K ;

Kitamura, F ;

Ohsaka, T ;

Tokuda, K .

JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 2001, 510 (1-2) :128-135

[3] MOLECULAR ORBITAL VIEW OF CHEMISORBED CARBON MONOXIDE [J].

BLYHOLDER, G .

JOURNAL OF PHYSICAL CHEMISTRY, 1964, 68 (10) :2772-&

[4] 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

[5] The adsorption of CO on the stepped Pt{211} surface: a comparison of theory and experiment [J].

Creighan, SC ;

Mukerji, RJ ;

Bolina, AS ;

Lewis, DW ;

Brown, WA .

CATALYSIS LETTERS, 2003, 88 (1-2) :39-45

[6] Vibrational Stark tuning rates from periodic DFT calculations:: CO/Pt(111) [J].

Ferre, Daniel Curulla ;

Niemantsverdriet, J. W. .

ELECTROCHIMICA ACTA, 2008, 53 (06) :2897-2906

[7] Surface chemistry of carbon dioxide [J].

Freund, HJ ;

Roberts, MW .

SURFACE SCIENCE REPORTS, 1996, 25 (08) :225-273

[8] Stripping voltammetry of carbon monoxide oxidation on stepped platinum single-crystal electrodes in alkaline solution [J].

Garcia, Gonzalo ;

Koper, Marc T. M. .

PHYSICAL CHEMISTRY CHEMICAL PHYSICS, 2008, 10 (25) :3802-3811

[9] Dual Reactivity of Step-Bound Carbon Monoxide during Oxidation on a Stepped Platinum Electrode in Alkaline Media [J].

Garcia, Gonzalo ;

Koper, Marc T. M. .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2009, 131 (15) :5384-+

[10] MECHANISM OF ELECTROCHEMICAL OXIDATION OF CARBON MONOXIDE + METHANOL ON PLATINUM .2. REACTANT-PAIR MECHANISM FOR ELECTROCHEMICAL OXIDATION OF CARBON MONOXIDE + METHANOL [J].

GILMAN, S .

JOURNAL OF PHYSICAL CHEMISTRY, 1964, 68 (01) :70-&

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