Determination of the morphology factor of oxide layers

被引:166
作者
Da Silva, LM
De Faria, LA
Boodts, JFC
机构
[1] Univ Sao Paulo, FFCLRP, Dept Quim, BR-14040901 Ribeirao Preto, SP, Brazil
[2] Univ Fed Uberlandia, Inst Quim, BR-38400902 Uberlandia, MG, Brazil
基金
巴西圣保罗研究基金会;
关键词
oxide films; differential capacity; morphology factor; capacity charge; ionic radius;
D O I
10.1016/S0013-4686(01)00738-1
中图分类号
O646 [电化学、电解、磁化学];
学科分类号
081704 ;
摘要
From the linear dependencies of the voltammetric capacitive current, i(c), with the potential sweep rates, nu, observed in the low and high domains, it is possible to determine the inner and outer differential capacities of oxide coatings. The morphological factor,phi, defined as the ratio of the inner and total differential capacities (C-d,C-i/Cd) shows a linear relationship with the radius/ionic charge ratio of the anion of the supporting electrolyte. The dependence of the capacitive voltammetric charge, q(c), on nu was interpreted on the basis of a purely capacitive model for the oxide/solution interface. (C) 2001 Elsevier Science Ltd. All rights reserved.
引用
收藏
页码:395 / 403
页数:9
相关论文
共 29 条
[1]   INNER AND OUTER ACTIVE SURFACE OF RUO2 ELECTRODES [J].
ARDIZZONE, S ;
FREGONARA, G ;
TRASATTI, S .
ELECTROCHIMICA ACTA, 1990, 35 (01) :263-267
[2]  
Bard A. J., 1980, ELECTROCHEMICAL METH
[3]  
BAYDI ME, 1995, J SOLID STATE CHEM, V116, P157, DOI DOI 10.1006/JSSC.1995.1197
[4]   ADSORPTION AT RUTILE-SOLUTION INTERFACE .2. MODEL OF ELECTROCHEMICAL DOUBLE LAYER [J].
BERUBE, YG ;
DEBRUYN, PL .
JOURNAL OF COLLOID AND INTERFACE SCIENCE, 1968, 28 (01) :92-&
[5]  
Bockris J. O. M., 1977, MODERN ELECTROCHEMIS, V2
[6]   ELECTROCATALYSIS OF ANODIC OXYGEN-TRANSFER REACTIONS - CHRONOAMPEROMETRIC AND VOLTAMMETRIC STUDIES OF THE NUCLEATION AND ELECTRODEPOSITION OF BETA-LEAD DIOXIDE AT A ROTATED GOLD DISK ELECTRODE IN ACIDIC MEDIA [J].
CHANG, HP ;
JOHNSON, DC .
JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 1989, 136 (01) :17-22
[7]  
Conway B. E., 1999, ELECTROCHEMICAL SUPE
[8]   Morphological, chemical, and electrochemical properties of Ti/(TiO2+IrO2) electrodes [J].
da Silva, LA ;
Alves, VA ;
da Silva, MAP ;
Trasatti, S ;
Boodts, JFC .
CANADIAN JOURNAL OF CHEMISTRY-REVUE CANADIENNE DE CHIMIE, 1997, 75 (11) :1483-1493
[9]   Oxygen evolution at RuO2(x) plus Co3O4(1-x) electrodes from acid solution [J].
Da Silva, LM ;
Boodts, JFC ;
De Faria, LA .
ELECTROCHIMICA ACTA, 2001, 46 (09) :1369-1375
[10]   'In situ' and 'ex situ' characterization of the surface properties of the RuO2(x)+Co3O4(1-x) system [J].
Da Silva, LM ;
Boodts, JFC ;
DeFaria, LA .
ELECTROCHIMICA ACTA, 2000, 45 (17) :2719-2727