Abstract
Titanium dioxide shows a blue coloration after being placed in contact with a sodium amalgam at room temperature [1]. Sodium and hydrogen diffuse during treatment. Water decomposition by an electrochemical cell with an n-TiO2 electrode (treated in a H2 gas atmosphere) was first demonstrated by FUJISHIMA and HONDA [2], The characterization of the surface structure and chemical composition of the active TiO2 surface is needed in order to understand the mechanisms of the photocatalytic reaction and the coloration process [3,4].
l Work partially supported by PNCB-CONACYT (Mexico) and SEPAFIN (Mexico).
3 Also in Escuela Superior de Fisica y Matematicas del IPN.
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Peña, J.L., Farias, M.H., Sanchez-Sinencio, F. (1979). SIMS Analysis of TiO2, Including Depth Profiling. In: Benninghoven, A., Evans, C.A., Powell, R.A., Shimizu, R., Storms, H.A. (eds) Secondary Ion Mass Spectrometry SIMS II. Springer Series in Chemical Physics, vol 9. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-61871-0_67
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