Study of carbon monoxide adsorption and oxidation on Pt(111) by using an electrochemical impinging jet cell

被引：28

作者：

Bergelin, M

Feliu, JM

Wasberg, M

机构：

[1] Abo Akad, Analyt Chem Lab, FIN-20500 Turku, Finland

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

来源：

ELECTROCHIMICA ACTA | 1998年 / 44卷 / 6-7期

基金：

芬兰科学院;

关键词：

carbon monoxide; Pt(111); impinging jet; flow cell; adsorption; electrocatalysis;

D O I：

10.1016/S0013-4686(98)00210-2

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

An impinging jet electrochemical flow cell developed for use with bead type electrodes was successfully employed in a surface structure sensitive study involving the processes of CO adsorption and oxidation on Pt(111) in 1.0 mol dm(-3) H2SO4 and HClO4. The flow cell enabled straightforward CO coverage control by means of varying the dosing time. Anion and hydrogen displacement charge curves with high potential resolution were obtained by means of CO adsorption and an electrolyte dependent fine structure was found. During the dosing of the electrolyte dissolved CO in the potential range 700-800 mV (vs. RHE) a slow delayed oxidation of adsorbed CO was noted and interpreted as being due to adsorption competition between CO and an oxygen containing species. A novel anion-anion displacement method was developed in which adsorbed bisulfate was replaced by perchlorate or water. The negative current transient obtained indicated desorption of bisulfate. (C) 1998 Elsevier Science Ltd. All rights reserved.

引用

页码：1069 / 1075

页数：7

共 15 条

[1] BERGELIN M, IN PRESS J ELECTROAN
[2] Comparison of electrosorption at activated polycrystalline and Pt(531) kinked platinum electrodes. Surface voltammetry and charge displacement on potentiostatic CO adsorption
Clavilier, J
Orts, JM
Gomez, R
Feliu, JM
Aldaz, A
[J]. JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 1996, 404 (02): : 281 - 289
[3] DISPLACEMENT OF ADSORBED IODINE ON PLATINUM SINGLE-CRYSTAL ELECTRODES BY IRREVERSIBLE ADSORPTION OF CO AT CONTROLLED POTENTIAL
CLAVILIER, J
ALBALAT, R
GOMEZ, R
ORTS, JM
FELIU, JM
[J]. JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 1993, 360 (1-2): : 325 - 335
[4] STUDY OF THE CHARGE DISPLACEMENT AT CONSTANT POTENTIAL DURING CO ADSORPTION ON PT(110) AND PT(111) ELECTRODES IN CONTACT WITH A PERCHLORIC-ACID SOLUTION
CLAVILIER, J
ALBALAT, R
GOMEZ, R
ORTS, JM
FELIU, JM
ALDAZ, A
[J]. JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 1992, 330 (1-2): : 489 - 497
[5] CLIMENT V, IN PRESS ELECTROCHEM, V97
[6] NEW INFORMATION ON THE UNUSUAL ADSORPTION STATES OF PT(111) IN SULFURIC-ACID-SOLUTIONS FROM POTENTIOSTATIC ADSORBATE REPLACEMENT BY CO
FELIU, JM
ORTS, JM
GOMEZ, R
ALDAZ, A
CLAVILIER, J
[J]. JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 1994, 372 (1-2): : 265 - 268
[7] ELECTROCHEMICAL STUDIES IN SULFURIC-ACID-SOLUTIONS OF ABSORBED CO ON PT (111) ELECTRODES
FELIU, JM
ORTS, JM
FERNANDEZVEGA, A
ALDAZ, A
CLAVILIER, J
[J]. JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 1990, 296 (01): : 191 - 201
[8] GOMEZ R, 1997, ACS SYM SER, V656, P656
[9] Adsorption of water at Pt(111) electrode in HClO4 solutions. The potential of zero charge
Iwasita, T
Xia, XH
[J]. JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 1996, 411 (1-2): : 95 - 102
[10] POTENTIOSTATIC CHARGE DISPLACEMENT BY EXCHANGING ADSORBED SPECIES ON PT(111) ELECTRODES - ACIDIC ELECTROLYTES WITH SPECIFIC ANION ADSORPTION
ORTS, JM
GOMEZ, R
FELIU, JM
ALDAZ, A
CLAVILIER, J
[J]. ELECTROCHIMICA ACTA, 1994, 39 (11-12) : 1519 - 1524

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