Photoelectrochemical decompositions

Efficient photoelectrochemical decomposition of ZnSe electrodes has been observed in aqueous (indifferent) electrolytes of various pHs, despite the wide band gap of the semiconductor [119, 120]. On the other hand, ZnSe has been found to exhibit better dark electrochemical stability compared to the GdX compounds. Large dark potential ranges of stability (at least 3 V) were determined for I-doped ZnSe electrodes in aqueous media of pH 0, 6.3, and 14, by Gautron et al. [121], who presented also a detailed discussion of the flat band potential behavior on the basis of the Gartner model. Interestingly, a Nernstian pH dependence was found for... 

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. 

H. Hidaka, Y. Asai, J. Zhao, K. Nohara, E. Pelizzetti, N. Serpone, Photoelectrochemical decomposition of surfactants on a TiC /TCO particulate film electrode assembly, J. Phys. Chem. 99 (1995) 8244-8248. 

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... 

Photoelectrochemical Decomposition of HaS. The photo-electrochemical decomposition ofHjS on CdSe with solar light alone has an efficiency of only 1.8% (Kainthla, 1987). However, photoelectrocatalytic processes and the use of two-electrode photocells would be expected to greatly increase the efficiency of conversion.29... 

Measurement of the variation in half-wave potential with flow rate over the channel electrode and comparison with simulated EC theory gave a first-order rate constant for the photoelectrochemical decomposition of CV of 2.1 s (A, 406 nm light intensity, 35 mW cm ). 

In full analogy with the redox reactions, see above, the photoelectrochemical decomposition (i.e., corrosion under illumination) is thermodynamically possible if... 

Photoelectrochemical reduction of CO2 Photocatalytic reduction of CO2 Photoelectrochemical decomposition of H2S Photoelectrochemical conversion of SO2 Photoelectrochemical reduction of O2 Photoelectrochemical generation of H2... 

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... 

Antoniadou, M., Bouras, P, Strataki, N. Lianos, P Hydrogen and electricity generation by photoelectrochemical decomposition of ethanol over nanocrystalline titania. Int. J. Hydrogen Energy 33 19 (2008), pp. 5045-5051. 

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