Cathode catalyst used for producing hydrogen from organic waste water and preparation method thereof
A cathode catalyst, organic wastewater technology, applied in chemical instruments and methods, energy wastewater treatment, electrodes, etc., can solve the problems of high cost, high price, application limitations, etc., and achieve the effect of low cost and simple preparation process
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Embodiment 1
[0020] Using nickel alloy powder 1 as cathode catalyst
[0021] The mass of Ni was 49.0 g, the mass of Al was 48.4 g, and the mass of Co was 2.6 g. Using nickel, aluminum and cobalt as raw materials, first put the three metals evenly mixed into a melting furnace, fully melt the mixture at a high temperature of 1450°C to alloy it, and then rapidly quench it to room temperature at a speed of 14°C / s. Finally, through crushing, ball milling (ball mill model: AX) and sieving, uniform nickel-based alloy powder 1 was obtained, with a particle size of about 38 μm.
[0022] Electrode preparation. Firstly, nickel-based alloy powder and Nafion solution are uniformly mixed in a certain proportion to make a catalyst slurry, and then the catalyst slurry is evenly coated on the surface of a carrier such as carbon paper, carbon cloth or carbon plate, and then the temperature is programmed (80-150°C) Method obtained by drying. The thickness of the catalyst layer is 18μm, and the catalyst lo...
Embodiment 2
[0025] Using nickel alloy powder 2 as cathode catalyst
[0026] The weight of Ni was 59.5 g, the weight of Al was 35.5 g, and the weight of Co was 5.0 g. The three materials of nickel, aluminum and cobalt are evenly mixed, melted at 1480°C, quenched to room temperature at a speed of 14°C / s, ball milled and sieved. The particle size of nickel-based alloy powder 2 is about 37μm.
[0027] Using nickel-based alloy powder 2, an electrode was prepared and a biohydrogen production reactor was assembled in the same manner as in Example 1. The thickness of the catalyst layer and the loading capacity of the catalyst are respectively 18 μm and 1.8 mg / cm 2 , assemble 800mL reactor, add 708mL organic waste water. The hydrogen production rate is 0.43 m3 / day / cubic reactor, and the hydrogen content is 40.2%.
Embodiment 3
[0029] Using nickel alloy powder 3 as cathode catalyst
[0030] The weight of Ni was 35.5 g, the weight of Al was 59.5 g, and the weight of Co was 5.0 g. The three materials of nickel, aluminum and cobalt are evenly mixed, melted at 1460°C, quenched to room temperature at a rate of 13°C / s, ball milled and sieved. The particle size of nickel-based alloy powder 3 is about 38μm.
[0031] Using the nickel-based alloy powder 3, an electrode was prepared and a biohydrogen production reactor was assembled in the same manner as in Example 1. The thickness of the catalyst layer and the loading capacity of the catalyst are 19 μm and 1.9 mg / cm respectively 2 , assemble 800mL reactor, add 709mL organic waste water. The hydrogen production rate is 0.40 m3 / day / cubic reactor, and the hydrogen content is 40.1%.
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