Influence of surface chemical structure of active carbon on its electrochemical behaviour in the presence of silver

被引：18

作者：

Biniak, S ^{[1
]}

Pakula, M

Swiatkowski, A

机构：

[1] Nicholas Copernicus Univ, Fac Chem, PL-87100 Torun, Poland

[2] Polish Naval Acad, PL-81919 Gdynia, Poland

[3] Mil Tech Acad, PL-01489 Warsaw, Poland

来源：

JOURNAL OF APPLIED ELECTROCHEMISTRY | 1999年 / 29卷 / 04期

关键词：

active carbon; carbon electrodes; silver deposition; surface chemistry; XPS;

D O I：

10.1023/A:1003424419533

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Cyclic voltammetric studies of the influence of surface chemistry on the electrochemical behaviour of powdered active carbon electrodes were carried out in the presence of silver both in bulk solution and pre-adsorbed on carbon. Surfaces with a variety of chemical properties were obtained through the modification of carbon samples by heat treatment under vacuum, oxidation with concentrated nitric acid and annealing in an ammonia atmosphere. The surface area (BET), acid-base neutralization capacities and sorption capacity towards Ag+ ions were estimated in the samples obtained. The states and relative amounts of deposited Ag species were estimated using XPS. The influence of the surface chemistry of the powdered carbon material in terms of its electrochemical properties and the mechanism of silver adsorption and deposition is discussed.

引用

页码：481 / 487

页数：7

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