Alternating Current Measurements in Scanning Electrochemical Microscopy, Part 2: Detection of Adsorbates

被引：19

作者：

Dao Trinh ^{[1
]}

Keddam, Michel ^{[1
]}

Ramon Novoa, Xose ^{[2
]}

Vivier, Vincent ^{[1
]}

机构：

[1] Univ Paris 06, LISE UPR CNRS 15, F-75252 Paris 05, France

[2] Univ Vigo, ENCOMAT Grp, ETSEI, Vigo 36310, Spain

来源：

CHEMPHYSCHEM | 2011年 / 12卷 / 11期

关键词：

adsorption; electrochemistry; hydrogen; scanning electrochemical microscopy; scanning probe microscopy; HYDROGEN EVOLUTION REACTION; OVERPOTENTIAL-DEPOSITED H; SINGLE-CRYSTAL ELECTRODES; IMPEDANCE SPECTROSCOPY; ADSORPTION-ISOTHERMS; AC-RESPONSE; SURFACE; H-2; PLATINUM; KINETICS;

D O I：

10.1002/cphc.201001085

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：

A scanning electrochemical microscope (SECM) in ac mode is used for the characterisation of the adsorption process during the hydrogen evolution reaction (HER) in sulfuric acid solution. It is shown that this technique allows quantitative analysis of the adsorption process, and measurements of the differential capacitance with the frequency as parameter are obtained. The time constant for relaxation of adsorbed hydrogen (H-ads) is approximately 2 Hz, and analysis of the Nyquist plot allows direct evaluation of the charge involved. In addition, the direct comparison of the usual electrochemical impedance data and ac-SECM results obtained simultaneously permits characterisation of processes occurring at the surface and in solution.

引用

页码：2177 / 2183

页数：7

共 69 条

[1] Effect of organic additives on hydrogen permeation into an iron membrane studied by frequency analysis techniques [J].

Amokrane, N. ;

Gabrielli, C. ;

Maurin, G. ;

Mirkova, L. .

ELECTROCHIMICA ACTA, 2007, 53 (04) :1962-1971

[2]

[Anonymous], 2001, ELECTROCHEMICAL METH

[3] QUANTITATIVE-ANALYSIS OF THE DISTRIBUTION OF THE HYDROGEN ADSORPTION STATES AT PLATINUM SURFACES .1. APPLICATION TO PT (100) IN SULFURIC-ACID MEDIUM [J].

ARMAND, D ;

CLAVILIER, J .

JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 1987, 225 (1-2) :205-214

[4] BEHAVIOR OF OVERPOTENTIAL DEPOSITED SPECIES IN FARADAIC REACTIONS .2. AC IMPEDANCE MEASUREMENTS ON H-2 EVOLUTION KINETICS AT ACTIVATED AND UNACTIVATED PT CATHODES [J].

BAI, L ;

HARRINGTON, DA ;

CONWAY, BE .

ELECTROCHIMICA ACTA, 1987, 32 (12) :1713-1731

[5] High-frequency impedance spectroscopy of platinum ultramicroelectrodes in flowing solutions [J].

Baranski, AS ;

Krogulec, T ;

Nelson, LJ ;

Norouzi, P .

ANALYTICAL CHEMISTRY, 1998, 70 (14) :2895-2901

[6] Structural specificity of the kinetics of the hydrogen evolution reaction on the low-index surfaces of Pt single-crystal electrodes in 0.5 M dm-3 NaOH [J].

Barber, JH ;

Conway, BE .

JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 1999, 461 (1-2) :80-89

[7] SCANNING ELECTROCHEMICAL MICROSCOPY - A NEW TECHNIQUE FOR THE CHARACTERIZATION AND MODIFICATION OF SURFACES [J].

BARD, AJ ;

DENUAULT, G ;

LEE, C ;

MANDLER, D ;

WIPF, DO .

ACCOUNTS OF CHEMICAL RESEARCH, 1990, 23 (11) :357-363

[8] An impedance investigation of the mechanism of pure magnesium corrosion in sodium sulfate solutions [J].

Baril, Genevieve ;

Galicia, Gonzalo ;

Deslouis, Claude ;

Pebere, Nadine ;

Tribollet, Bernard ;

Vivier, Vincent .

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 2007, 154 (02) :C108-C113

[9] Improvement and characterization of the electrochemical reactivity of amorphous carbon nitride electrodes [J].

Benlahsen, M ;

Cachet, H ;

Charvet, S ;

Debiemme-Chouvy, C ;

Deslouis, C ;

Lagrini, A ;

Vivier, V .

ELECTROCHEMISTRY COMMUNICATIONS, 2005, 7 (05) :496-499

[10] AC-RESPONSE OF A ROTATING-RING-DISK ELECTRODE - APPLICATION TO 2-D AND 3-D FILM FORMATION IN ANODIC PROCESSES [J].

BENZEKRI, N ;

KEDDAM, M ;

TAKENOUTI, H .

ELECTROCHIMICA ACTA, 1989, 34 (08) :1159-1166

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