EXPERIMENTAL INVESTIGATION OF THE DOUBLE-LAYER CAPACITY, X-RAY-DIFFRACTION AND THE RELATIVE SURFACE CONTENT OF TIH2 DURING PRETREATMENT OF TITANIUM USED FOR THE PREPARATION OF DIMENSIONALLY STABLE ANODES WITH RUO2 AND OR IRO2 COATING/
J. Krysa et R. Mraz, EXPERIMENTAL INVESTIGATION OF THE DOUBLE-LAYER CAPACITY, X-RAY-DIFFRACTION AND THE RELATIVE SURFACE CONTENT OF TIH2 DURING PRETREATMENT OF TITANIUM USED FOR THE PREPARATION OF DIMENSIONALLY STABLE ANODES WITH RUO2 AND OR IRO2 COATING/, Electrochimica acta, 40(12), 1995, pp. 1997-2003
The first operation for the production of dimensionally stable electro
des based on titanium sheets covered with a layer of RuO2 and/or IrO2
is the treatment of titanium in HCl solution. The surface layer struct
ure of titanium treated in HCl has been determined by X-ray diffractio
n, electron microscopy and by measurement the double layer capacity. O
bservation of the surface of etched electrodes by EM has shown the TiH
2 (from the X-ray diffraction) formed during dissolution of titanium i
n an active region is not regularly distributed over all the surface a
rea compared to the regularly distributed TiH2 formed during the catho
dic polarization of titanium. The relative content of TiH2 was indepen
dently determined by X-ray diffraction and by vacuum desorption of H-2
from the decomposition of TiH2 and these values are directly proporti
onal. The increase of the relative surface content of TiH2 (determined
by X-ray diffraction) leads to the decrease of double layer capacity.