SURFACE STRESS CURVES FOR PLATINUM

被引：15

作者：

BECK, TR

LIN, KF

机构：

[1] Department of Chemical Engineering, University of Washington, Seattle

[2] Department of Industrial Chemistry, National Tsing Hua University, Hsin Chu

来源：

JOURNAL OF THE ELECTROCHEMICAL SOCIETY | 1979年 / 126卷 / 02期

关键词：

chemisorption; electrode; metal;

D O I：

10.1149/1.2129015

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Electrocapillary-type curves were measured for platinum ribbon electrodes in aqueous salt solutions using an extensometer instrument previously developed. A surface stress maximum was observed which varied with pH with a slope of about −50 mV/pH. This surface stress maximum is attributed to formation of a surface platinum hydride. Immediately positive of this maximum is a region about 0.15-0.4V wide in which platinum exhibits classical electrocapillary behavior. At potentials more positive than this region, the surface stress decreases rapidly due to formation of surface oxides. A surface stress maximum is found for the oxide surface at +1.8V. © 1979, The Electrochemical Society, Inc. All rights reserved.

引用

页码：252 / 256

页数：5