Catalytic anode with conductive polymer intercalation and preparation method and application thereof

Abstract

The invention discloses a catalytic anode with a conductive polymer intercalation layer and a preparation method and application thereof, and relates to the technical field of electrolytic hydrogen production, and the preparation method comprises the following steps: step 1, growing a conductive polymer organic matter on foamed nickel through a chemical deposition method to prepare an electrode; step 2, preparing a mixed solution containing a nickel nitrate aqueous solution and a ferric nitrate aqueous solution as an electrolyte, transferring the mixed solution into a three-electrode electrolytic tank, and carrying out electro-deposition by taking the electrode prepared in the step 1 as an electrolytic tank cathode and a platinum wire electrode as an electrolytic tank anode; and step 3, taking out the foamed nickel subjected to electro-deposition, washing, and removing surface moisture to obtain the catalytic anode with the conductive polymer intercalation. The seawater direct electrolysis catalytic stability (500 + h) is improved, the catalytic activity is improved, the seawater electrolysis hydrogen production cost is reduced by 37.5%, the electrode synthesis process is safe and environment-friendly, the operation is simple, the cost is low, and the portability is good.

Claims

1. A method for preparing a catalytic anode having a conductive polymer intercalation layer, characterized in that: The steps include: Step 1: growing a conductive high molecular organic substance on nickel foam by chemical deposition to prepare an electrode; Step 2: preparing a mixed solution containing an aqueous nickel nitrate solution and an aqueous ferric nitrate solution as an electrolyte, transferring the solution to a three-electrode electrolytic cell, using the electrode prepared in step 1 as a cathode of the electrolytic cell and a platinum wire electrode as an anode of the electrolytic cell to perform electrodeposition; Step 3: Take out the nickel foam after electrodeposition, wash it, remove the surface moisture, and obtain a catalytic anode with a conductive polymer intercalation layer.

2. The method for preparing a catalytic anode having a conductive polymer intercalation layer according to claim 1, characterized in that: In step 1, the conductive high molecular organic substance is selected from any one of 3-carboxypyrrole, sodium dodecyl sulfate, and ethylenediaminetetraacetic acid.

3. The method for preparing a catalytic anode having a conductive polymer intercalation layer according to claim 1, characterized in that: In step 1, the electrode is prepared by: The conductive high molecular organic matter is dissolved in deionized water to prepare a solution, and then the cleaned foamed nickel is immersed in the solution without stirring. After being placed for a period of time, it is taken out and washed to remove surface moisture to obtain the electrode.

4. The method for preparing a catalytic anode having a conductive polymer intercalation layer according to claim 3, characterized in that: The mass volume ratio (g / mL) of the conductive high molecular organic matter to the deionized water is 1:5-100.

5. The method for preparing a catalytic anode with a conductive polymer intercalation layer according to claim 1, characterized in that: In step 2, the molar ratio of the nickel nitrate aqueous solution to the iron nitrate aqueous solution is 1:1, and the volume ratio is 10:1-1:

10.

6. The method for preparing a catalytic anode with a conductive polymer intercalation layer according to claim 1, characterized in that: In step 2, the electrodeposition is performed at a potential of -1.5 V vs. RHE. The electrodeposition includes two times of electrodeposition. After the first electrodeposition for 6 min, the electrode is taken out, and after removing the surface bubbles, the electrodeposition is performed again for 6 min to form a more uniform catalyst layer.

7. The method for preparing a catalytic anode with a conductive polymer intercalation layer according to claim 1, characterized in that: In step 2, the mixed solution also includes an aqueous solution of chromium nitrate.

8. The method for preparing a catalytic anode with a conductive polymer intercalation layer according to claim 7, characterized in that: The concentration of the chromium nitrate aqueous solution is the same as that of the nickel nitrate aqueous solution or the ferric nitrate aqueous solution, and the volume ratio of the chromium nitrate aqueous solution to the nickel nitrate aqueous solution or the ferric nitrate aqueous solution is 1-4:

2.

9. A catalytic anode with a conductive polymer intercalation layer prepared by the preparation method according to any one of claims 1 to 8.

10. Use of the catalytic anode with a conductive polymer intercalation layer as claimed in claim 9 in a hydrogen production system by electrolysis of seawater.

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