Electrochemical sensor of hydrogen and hydrogen-containing reducing agents

• US 4,172,022 A
• Filed: 05/11/1977
• Issued: 10/23/1979
• Est. Priority Date: 04/05/1977
• Status: Expired due to Term

• Current Assignee: Alexandr G. Polyak, Grigory F. Muchnik, Nikolai S. Lidorenko, Vasily A. Vakhonin, Vyacheslav M. Krylov
• Original Assignee: Alexandr G. Polyak, Grigory F. Muchnik, Nikolai S. Lidorenko, Vasily A. Vakhonin, Vyacheslav M. Krylov
• Inventors: Lidorenko, Nikolai S., Muchnik, Grigory F., Vakhonin, Vasily A., Polyak, Alexandr G., Krylov, Vyacheslav M.
• Primary Examiner(s): Tung, T.
• Application Number:
  US05/795,708
• Time in Patent Office: 895 Days
• Field of Search: 204/195 R, 204/1 H, 204/195 S, 204/1 S, 429/43
• US Class Current: 204/426
• CPC Class Codes: G01N 27/4045 for gases other than oxygen
• CPC Class Codes: G01N 33/005 H2

Abstract

The electrochemical sensor of hydrogen and hydrogen-containing reducing agents comprises a cathode which is coal activated with a selective organic catalyst for electrochemical reduction of oxygen, an anode based on the metals of the platinum group and an acidic polymeric electrolyte disposed therebetween. The proposed sensor is capable of operating in a mixture of oxygen with hydrogen or a hydrogen-containing reducing agent without separation of the components. The sensitivity of the sensor to hydrogen is 10^-3 to 10^-4 percent by volume.

Claims

1. An electrochemical sensor of hydrogen and hydrogen-containing reducing agents adapted to operate as a current source in a mixture of oxygen, hydrogen or hydrogen-containing reducing agents directly without preliminary separation of the components comprising:

a cathode of coal powder in contact with a selective organic catalyst from the group consisting of chloroquinones, redox polymers; and

polymer or monomer phthalocyanines of a transition metal;

a platinum anode; and

an acidic polymeric electrolyte disposed between the cathode and the anode.

2. An electrochemical sensor according to claim 1, wherein said catalyst is tetrachloroparabenzoquinone.

3. An electrochemical sensor according to claim 1 wherein said catalyst is a copolymer of formaldehyde and pyrocatechol.

4. An electrochemical sensor according to claim 1 wherein said catalyst is a phthalocyanine polymer of a transition metal.

5. An electrochemical sensor according to claim 4 wherein said catalyst is polymeric iron phthalocyanine.

6. An electrochemical sensor according to claim 1 wherein said catalyst is monomeric phthalocyanines of a transition metal.

7. An electrochemical sensor according to claim 6 wherein said catalyst is monomeric iron phthalocyanine.