Fractal dimensions of Ti-supported oxide electrodes and their electrocatalytic properties

Citation
Zh. Liang et al., Fractal dimensions of Ti-supported oxide electrodes and their electrocatalytic properties, CHIN J CATA, 22(2), 2001, pp. 148-150
Citations number
11
Language
CHINESE
art.tipo
Article
Categorie Soggetti
Chemical Engineering
Journal title
CHINESE JOURNAL OF CATALYSIS
ISSN journal
0253-9837 → ACNP
Volume
22
Issue
2
Year of publication
2001
Pages
148 - 150
Database
ISI
SICI code
0253-9837(200103)22:2<148:FDOTOE>2.0.ZU;2-E
Abstract
Several Ti-supported oxide anodic materials are prepared by thermal decompo sition method and the anodic kinetic parameters (a, b, i(0)) are determined in 1 mol/L H2SO4 solution. The SEM photographs of the electrodes are scann ed and saved as a BMP image file, from which a three-dimensional space with graph and grey scale is obtained. Then the fractal dimension of the electr odes is calculated by using the formula D-B(F) = logN(delta)(F)/-log delta and a calculation program. The electrocatalytic performance of the electrod es is discussed combining with the fractal dimension and kinetic parameters . The influences of the electrode composition on the kinetic parameters are also discussed according to the dual barrier model and mechanism of the ox ygen evolution at oxide anodes. The results show that the larger fractal di mension of the electrodes is, the better electrocatalytic activity is.