In-situ vibrational spectroscopy on Pt electrocatalysts

被引：28

作者：

Friedrich, KA

Henglein, F

Stimming, U

Unkauf, W

机构：

[1] Tech Univ Munich, Phys Dept E19, D-85748 Garching, Germany

[2] Eckart Werke GmbH & Co, Forsch & Entwicklung, D-912335 Velden, Germany

来源：

ELECTROCHIMICA ACTA | 2001年 / 47卷 / 05期

关键词：

electrocatalysts; CO adsorption; colloids;

D O I：

10.1016/S0013-4686(01)00749-6

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

CO adsorption on structurally very different electrocatalysts, namely carbon supported Pt catalysts and adsorbed colloids on surfaces (a model system), has been studied. From a comparison of the spectra of CO monolayers on these disparate electrocatalysts, conclusions can be derived regarding the structure of the particles. A correlation between CO vibrational frequency and structural properties, e.g. isolated particles versus agglomerated particles, is found. A dependence of vibrational frequency on the particle coverage is assigned to an increasing agglomeration with increasing Pt-coverage. The spectra of the technical electrocatalysts can be explained in terms of the simpler model systems. (C) 2001 Elsevier Science Ltd. All rights reserved.

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页码：689 / 694

页数：6

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