Non-metallic working electrodes for high temperature systems

Uchida, Isamu; Urushibata, Hiroaki; Toshima, Shinobu

doi:10.1007/bf01112072

Cited by 3 publications

(2 citation statements)

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“…The anodic limit of the melt is chlorine evolution, which occurs at potentials positive to 2.15V vs. A1 at 175~ (7). The increase of anodic current at SnO2 is due to chlorine evolution as described in our comparative study on chlorine evolution at SnO2 and glassy carbon electrodes (10). In comparison with the SnO2 electrode, it is noted that the chlorine evolution on the TiO2 electrode is quite irreversible in dark, no detectable chlorine evolution taking place even at 3.0V vs. A1.…”

Section: Resultssupporting

confidence: 54%

“…Shub et al studied chlorine evolution on TiO2 photoanodes in aqueous solutions containing C1-ions (22), suggesting that the photo-oxidation mechanism consists of two elementary reactions involving adsorbed intermediates; the hole-capturing reaction by adsorbed C1-and the following recombination reaction of ad-sorSed CI radicals. Taking into account the specific adsorption of Cl-at the melt-oxide interface, similar reaction scheme can be applicable to this system Clad-+ h + +~-Clad [9] 2Clad -~-2C1-(melt) --> 2Clad-~-C12 [10] The energy levels of Clad-may be distributed below E~ while the levels of Clad must be positioned above E~…”

Section: [8]mentioning

confidence: 99%

See 1 more Smart Citation

Titanium Dioxide Electrode in Molten Sodium Tetrachloroaluminate; Photocurrent and Flatband Potential

Uchida

Urushibata

Akahoshi

et al. 1980

J. Electrochem. Soc.

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The electrochemical behavior of single crystal normaln‐TiO2 electrodes has been investigated in molten sodium tetrachloroaluminate false(AlCl3+normalNaClfalse) at 175°C. The impedance and photoanodic current were measured as functions of electrode potential and of melt acidity specified by pnormalClfalse(=−logaCl−false) . The flat‐band potential and the onset potential of photocurrent show pronounced pCl dependence with a variation rate of 2(2.3 kT/e) per unit pCl, and this anomaly has been ascribed to the specific adsorption of Cl− on TiO2 . Characterization of the melt‐oxide interface and the photoelectrochemical oxidation of Cl− via adsorbed intermediates are discussed on the basis of semiconductor energetics.

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Section: Resultssupporting

confidence: 54%

Section: [8]mentioning

confidence: 99%