Vibrational properties of CO at the Pt(111)-solution interface: the anomalous stark-tuning slope

被引：63

作者：

Stamenkovic, V

Chou, KC

Somorjai, GA

Ross, PN

Markovic, NM ^{[1
]}

机构：

[1] Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA

[2] Univ Calif Berkeley, Dept Chem, Berkeley, CA 94720 USA

来源：

JOURNAL OF PHYSICAL CHEMISTRY B | 2005年 / 109卷 / 02期

关键词：

D O I：

10.1021/jp044802i

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：

Vibrational properties of CO have been studied on Pt(111) in acid and alkaline electrolytes by synchronous measurements of CO oxidation current (0.5 mV/s) and WAS spectra (one spectrum for every 1 mV). We found that in acid solutions the frequency-tuning rate (dv(CO)/dE) as well as the potential-dependent bandwidth (dDeltav(1/2)/dE) deviates from expected linear relationships. This unusual potential-dependent behavior is interpreted in terms of compression/dissipation of CO islands during the CO oxidation, engendered by competitive adsorption between inactive anions from a supporting electrolyte and the reactive OH species.

引用

收藏

页码：678 / 680

页数：3

相关论文

共 12 条

[1] 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

[2] An in situ time-dependent study of CO oxidation on Pt(111) in aqueous solution by voltammetry and sum frequency generation [J].

Chou, KC ;

Markovic, NM ;

Kim, J ;

Ross, PN ;

Somorjai, GA .

JOURNAL OF PHYSICAL CHEMISTRY B, 2003, 107 (08) :1840-1844

[3]

ENGEL T, 1979, ADV CATAL, V28, P1

[4] CO ADSORPTION ON PT(111) AND PT(100) SINGLE-CRYSTAL SURFACES IN AQUEOUS-SOLUTIONS STUDIED BY INFRARED REFLECTION ABSORPTION-SPECTROSCOPY [J].

KITAMURA, F ;

TAKEDA, M ;

TAKAHASHI, M ;

ITO, M .

CHEMICAL PHYSICS LETTERS, 1987, 142 (05) :318-322

[5] Vibrational Stark effect of adsorbates at electrochemical interfaces [J].

Lambert, DK .

ELECTROCHIMICA ACTA, 1996, 41 (05) :623-630

[6] INSITU INFRARED-SPECTROSCOPY OF WELL-DEFINED SINGLE-CRYSTAL ELECTRODES - ADSORPTION AND ELECTROOXIDATION OF CO ON PT(111) [J].

LEUNG, LWH ;

WIECKOWSKI, A ;

WEAVER, MJ .

JOURNAL OF PHYSICAL CHEMISTRY, 1988, 92 (24) :6985-6990

[7] Effect of temperature on surface processes at the Pt(111)-liquid interface: Hydrogen adsorption, oxide formation, and CO oxidation [J].

Markovic, NM ;

Schmidt, TJ ;

Grgur, BN ;

Gasteiger, HA ;

Behm, RJ ;

Ross, PN .

JOURNAL OF PHYSICAL CHEMISTRY B, 1999, 103 (40) :8568-8577

[8]

Markovic NM, 2002, SURF SCI REP, V45, P121, DOI 10.1016/S0167-5729(01)00022-X

[9] QUANTITATIVE STRUCTURE-ANALYSIS OF A DISORDERED SYSTEM - RHEED STUDY OF THE CO-INDUCED (1X2)-](1X1) STRUCTURE TRANSITION OF PT(110) [J].

SCHWEGMANN, S ;

TAPPE, W ;

KORTE, U .

SURFACE SCIENCE, 1995, 334 (1-3) :55-76

[10] CARBON-MONOXIDE ADLAYER STRUCTURES ON PLATINUM(111) ELECTRODES - A SYNERGY BETWEEN IN-SITU SCANNING-TUNNELING-MICROSCOPY AND INFRARED-SPECTROSCOPY [J].

VILLEGAS, I ;

WEAVER, MJ .

JOURNAL OF CHEMICAL PHYSICS, 1994, 101 (02) :1648-1660