Photochemical cell

Details Photochemical cell Photochemical cell

1975-11-03

1977-08-16

Mack, John H.

Chemistry: electrical current producing apparatus, product, and

Deferred action type

Responsive to light

204129, 204278, 204239, 204290R, 204290F, 126271, H01M 630, C25B 102

Patent

active

040427587

ABSTRACT:
A photochemical cell is disclosed which includes an anode of titanium, a cathode of platinum, and a suitable electrolyte. The anode has a thin film of titanium dioxide formed on it, and the anode and cathode are suitably configured in the electrolyte which is normally a very basic potassium hydroxide solution. When the anode is exposed to light of wavelength shorter than 415 nm, an emf of about 1 volt is found between the anode and the cathode so that an external current will flow from the cathode to the anode when they are connected. The cell also extracts O.sub.2 from a mixture of O.sub.2 and any other gases present.

REFERENCES:
patent: 3255044 (1966-06-01), Powers et al.
patent: 3271198 (1966-09-01), Windgradoff et al.
patent: 3628017 (1971-12-01), Lerner
patent: 3925212 (1975-12-01), Tchernev
A. Fujishima et al., J. Chem. Soc. Japan (Kogyo Kagaku Zasshi), 74, 355-358 (1971).
A. Fujishima et al., Nature, vol. 238, July 7, 1972, pp. 37-38.
A. Fujishima et al., J. Chem. Soc. Japan (Kogyo Kagaku Zasshi), 72, 108-113 (1969).
F. Mollers et al., J. Electrochem. Soc., vol. 121, pp. 1160-1167, Sept. 1974.
K. L. Hardee et al., J. Electrochem. Soc., vol. 122, pp. 739-741, June 1975.
A. Fujishima et al., J. Electrochem. Soc., vol. 122, pp. 1487-1488, Nov. 1975.
H. Yoneyama et al., Electrochimica Acta, vol. 20, pp. 341-345, (1975).
T. Ohnishi et al., Berichte der Bunsen Gesellschaft fur Physikalische Chemie, vol. 79, pp. 523-525 (1975).

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