Photoelectrochemical electrodes

Details Photoelectrochemical electrodes Photoelectrochemical electrodes

1982-05-10

1983-11-08

Weisstuch, Aaron

Chemistry: electrical and wave energy

Processes and products

Electrostatic field or electrical discharge

204242, 204278, 204290R, 204DIG3, 4274432, 429111, C25B 102, H01M 636

Patent

active

044140800

ABSTRACT:
The surface (20) of a moderate band gap semiconductor (12) such as p-type molybdenum sulfide is modified to contain an adherent film (24) of charge mediating ionene polymer containing an electroactive unit such as bipyridinium. Electron transport between the electrode (12) and the mediator film (24) is favorable and photocorrosion and recombination processes are suppressed. Incorporation of particles (26) of catalyst such as platinum within the film (24) provides a reduction in overvoltage. The polymer film is readily deposited on the electrode surface and can be rendered stable by ionic or addition cross-linking. Catalyst can be predispersed in the polymer film or a salt can be impregnated into the film and reduced therein.

REFERENCES:
patent: 4379740 (1983-04-01), Nazzal et al.
J. A. Bruce et al, J. Am. Chem. Soc., vol. 104, pp. 74-82 (Jan. 1982).
R. N. Dominey et al, J. Am. Chem. Soc., vol. 104, pp. 467-482 (Jan. 1982).
H. D. Abruna et al, J. Am. Chem. Soc., vol. 103, pp. 6901-6904 (Nov. 1981).
D. C. Bookbinder et al, J. Am. Chem. Soc., vol. 102, pp. 5123-5125 (1980).
H. D. Abruna et al, J. Am. Chem. Soc., vol. 103, pp. 1-5 (Jan. 1981).
O. Haas et al, J. Am. Chem. Soc., vol. 103, pp. 1318.varies.1319 (1981).
P. K. Ghosh et al, J. Electrochem. Soc., vol. 128, pp. 1281-1287 (Jun. 1981).
D. C. Bookbinder et al, Proc. Nat'l Acad. Sci USA, vol. 77, pp. 6280-6284 (1980).

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