Adsorption of hydrogen on Pt(111) and Pt(100) surfaces and its role in the HOR

被引：108

作者：

Strmcnik, D. ^{[1
]}

Tripkovic, D. ^{[1
]}

van der Vliet, D. ^{[1
]}

Stamenkovic, V. ^{[1
]}

Markovic, N. M. ^{[1
]}

机构：

[1] Univ Chicago, Argonne Natl Lab, Div Mat Sci, Argonne, IL 60439 USA

来源：

ELECTROCHEMISTRY COMMUNICATIONS | 2008年 / 10卷 / 10期

关键词：

Hydrogen adsorption; H-UPD; Adsorption isotherms; HOR;

D O I：

10.1016/j.elecom.2008.08.019

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Hydrogen adsorption isotherms, evaluated by combination of cyclic voltammetry and chronoamperometry, are reported on Pt(1 1 1) and Pt(1 0 0) surfaces in 0.1 M HCIO4. We found that at E > 0.05 V Pt(1 1 1) and Pt(1 0 0) are only partially covered by the adsorbed hydrogen (H-ad). On both surfaces, a full monolayer of the adsorbed hydrogen is completed at -0.1 V, i.e. the adsorption of atomic hydrogen is observed in the hydrogen evolution potential region. We also found, that the activity of the hydrogen oxidation reaction is mirrored by the shape of the hydrogen adsorption isotherms, implying that Had is in fact a spectator in the HOR. Published by Elsevier B.V.

引用

页码：1602 / 1605

页数：4

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