Fabrication of NiOOH/Cu2O/WO3 Electrocatalytic Material

Example 3

• • (1) Prepared a nickel oxalate dihydrate NiC₂O₄·2H₂O solution A with a concentration of 3 mol/L. Specifically, NiC₂O₄·2H₂O was added to 50 mL of deionized water and stirred for 30 minutes to form a uniformly mixed solution A;
  • (2) Put the solution A into a polytetrafluoroethylene lined autoclave, the volume filling ratio was maintained at 50%;
  • (3) Took a 50 mL beaker, and completely immersed the foamed copper with a length of 7 cm and a width of 1 cm into acetone, 3 mol/L HCl solution, deionized water, and absolute ethanol in sequence, and carried out ultrasonic treatment separately for 30 minutes. Put the processed foamed copper into a polytetrafluoroethylene reactor containing the solution A; put the sealed reactor into a homogeneous hydrothermal reactor, the temperature parameter was set to 180° C., and the reaction time was 18 hours;
  • (4) After the reaction was completed and cooled to room temperature, the foamed copper after the reaction was taken out and washed with absolute ethanol and deionized water for 3 times;
  • (5) Prepared a solution B of tungsten hexachloride WCl₆ with a concentration of 4 mol/L. Specifically, added WCl₆ to 60 mL of deionized water and stirred it for 30 minutes to form a uniformly mixed solution B;
  • (6) Immersed the NiOOH/Cu₂O-grown foamed copper in a polytetrafluoroethylene lined autoclave containing the solution B and sealed it, and the volume filling ratio was maintained at 60%. Put the sealed autoclave into a homogeneous hydrothermal reactor, the temperature parameter was set to 140° C., and the reaction time was 30 hours;
  • (7) After the reaction was completed, cooled to room temperature, took out the foamed copper after the reaction, and washed with absolute ethanol and deionized water 3 times. Put it into a 60° C. vacuum oven or a freeze-drying oven to dry for 6 hours to obtain a NiOOH/Cu₂O/WO₃/CF self-supporting electrocatalytic material. The total loading of NiOOH/Cu₂O/WO₃ was 3 mg/cm². The molar ratio of WO₃, Cu₂O, and NiOOH was 1:0.6:0.05.