Water decomposition photoelectrochemical

Figure 5 Apparatus for measurement of photoelectrochemical decomposition of water into hydrogen and oxygen. (Reproduced with permission from Ref. 10. Copyright 1987 The Ceramic Society of Japan.)...

Kocha, S.S., Montgomery, D., Peterson, M.W., and Turner, J.A., Photoelectrochemical decomposition of water utilizing monolithic tandem cells, Solar Energ. Mater. Solar Cells, 52,389,1998. 

Gao X, Kocha S, Frank AJ, Turner JA (1999) Photoelectrochemical decomposition of water using modified monolithic tandem cells, Int J Hydrogen Energy 24 319-325... 

Sayama K, Nomura A, Aral T et al (2006) Photoelectrochemical decomposition of water into H2 and O2 on porous BiV04 thin-fihn electrodes under visible light and significant effect of Ag ion treatment. J Phys Chem B 110 11352-11360... 

Alenzi, N., Liao, W. S., Cremer, P. S., Torres, V. S., Wood, T. K., Economides, Ch. E., et al. (2010). Photoelectrochemical hydrogen production from water/methanol decomposition using Ag/Ti02 nanocomposite thin films. International Journal of Hydrogen Energy, 35, 11768-11775. 

The sol-gel process to prepare SIO2 glass fibers and T102 films has been reviewed. It has been known that the hydrolysis conditions such as molar ratio of water to alkoxide and reaction temperature are critical to the desired forms of the gel product (fiber, film or bulk). Some properties of the resultant products have been examined. Especially, Ti02 films have been attempted to use as a photoanode for decomposition of water, and their photoelectrochemical properties are described in comparison with the results previously obtained for single crystal and polycrystalline TiC>2, and are discussed in terms of the microstructure of the film. 

This chapter considers photoanodes comprised of metal oxide semiconductors, which are of relatively low cost and relatively greater stability than their non-oxide counterparts. In 1972 Fujishima and Honda [1] first used a crystal wafer of n-type Ti02 (rutile) as a photoanode. A photoelectrochemical cell was constructed for the decomposition of water in which the Ti02 photoanode was connected with a Ft cathode through an external circuit. With illumination of the Ti02 current flowed from the Ft electrode to the... 

Division of the overall process into two stages production of electricity and water electrolysis proper. Let us replace a single photoelectrochemical cell by the combination of a solar cell (solid state or liquid junction ) and an ordinary electrolyzer. In this case, production of electricity and electrolytic decomposition of water, which are combined in a photoelectrolysis cell, appear to be distributed between two specially designed devices. This enables the necessary voltage to be attained by connecting in series several... 

The aqueous corrosion of ceramics may involve a charge-transfer or electrochemical dissolution process. However, in many cases, dissolution or corrosion may take place with no charge transfer yet may be determined by one or more electrochemical factors such as absorbed surface charge or electronic band bending at the surface of narrow-band-gap semiconducting ceramics. The aqueous corrosion of ceramics is important in a number of areas. One of the most important is the stability of passive oxide films on metals. The stability of ceramics is a critical aspect in some aqueous photoelectrochemical applications (12), an example being the photoelectrolytic decomposition of water. Structural, nonoxide ceramics such as SiC or Si3N4 are unstable in both aqueous acid and alkaline environments the latter is virtually unstudied, however. 

Fig. 9.1. Schematics of a photoelectrochemical cell (PEC) for photoinduced decomposition of water...

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