TY - JOUR
T1 - Iron(III)-titanium(IV)-oxide electrodes
T2 - Their structural, electrochemical and photoelectrochemical properties
AU - Danzfuss, Bodo
AU - Stimming, Ulrich
PY - 1984/4/10
Y1 - 1984/4/10
N2 - Iron(III)-titanium(IV)-oxides of the general composition FexTi1-xOy were prepared in the composition range x=0-0.9 by thermal decomposition of the corresponding metal salt solutions. For a medium range of composition, 0.1≤x≤0.7, amorphous oxides were formed under the given conditions of preparation. Electrochemical properties such as reduction and re-oxidation of the oxide, electrode capacity behaviour, oxygen evolution and reduction and the redox reaction, Fe2+/Fe3+, were investigated. Photoelectrochemical properties were obtained from photocurrent spectra and the dependence on potential of the photocurrent. Annealing experiments showed that crystallization yields lower photocurrents and a shift of the photocurrents spectra to shorter wavelengths. Thus, amorphous semiconductors seem worth being investigated for a possible application in electrochemical solar cells. An attempt is made to describe the impact of non-crystallinity on the photoelectrochemical behaviour of semiconductors. A model of the oxide is proposed to explain the electrochemical and photoelectrochemical properties of the oxides FexTi1-xOy.
AB - Iron(III)-titanium(IV)-oxides of the general composition FexTi1-xOy were prepared in the composition range x=0-0.9 by thermal decomposition of the corresponding metal salt solutions. For a medium range of composition, 0.1≤x≤0.7, amorphous oxides were formed under the given conditions of preparation. Electrochemical properties such as reduction and re-oxidation of the oxide, electrode capacity behaviour, oxygen evolution and reduction and the redox reaction, Fe2+/Fe3+, were investigated. Photoelectrochemical properties were obtained from photocurrent spectra and the dependence on potential of the photocurrent. Annealing experiments showed that crystallization yields lower photocurrents and a shift of the photocurrents spectra to shorter wavelengths. Thus, amorphous semiconductors seem worth being investigated for a possible application in electrochemical solar cells. An attempt is made to describe the impact of non-crystallinity on the photoelectrochemical behaviour of semiconductors. A model of the oxide is proposed to explain the electrochemical and photoelectrochemical properties of the oxides FexTi1-xOy.
UR - http://www.scopus.com/inward/record.url?scp=0021406387&partnerID=8YFLogxK
U2 - 10.1016/S0022-0728(84)80233-8
DO - 10.1016/S0022-0728(84)80233-8
M3 - Article
AN - SCOPUS:0021406387
SN - 0022-0728
VL - 164
SP - 89
EP - 119
JO - Journal of Electroanalytical Chemistry
JF - Journal of Electroanalytical Chemistry
IS - 1
ER -