Thermo-electric coupling bulk phase water oxidation catalyst for recycling low-grade waste heat
An oxidation catalyst, catalyst technology, applied in the direction of metal/metal oxide/metal hydroxide catalyst, physical/chemical process catalyst, catalyst activation/preparation, etc., can solve the problem that the kinetic promotion effect of ion oxidation step is not obvious enough, low grade Heat energy waste and other problems, to achieve universal industrial application prospects, low cost, and the effect of increasing the rate of oxygen evolution
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Embodiment 1
[0046] (1) Nickel foam (NF) is cleaned with dilute hydrochloric acid, deionized water and ethanol respectively, and is placed in the polytetrafluoroethylene reactor for subsequent use;
[0047] (2) Weigh nickel nitrate 5mmol and terephthalic acid 5mmol, dissolve in deionized water and N,N-dimethylformamide respectively;
[0048] (3) Pour the nickel nitrate solution and the terephthalic acid solution in the step (2) into the reactor successively, and react at 180° C. for 24 hours to obtain Ni BDC / NF, that is, Ni BDC metal-organic framework supported on nickel foam;
[0049] (4) Wash Ni BDC / NF obtained in step (3) with deionized water and ethanol respectively, and dry for subsequent use;
[0050] (5) Apply a voltage of 1.7V to the Ni BDC / NF obtained in step (4), and electrooxidize it for 12 hours until the current is stable to obtain Ni x (OH) y / NF metal hydroxide catalyst. HRTEM picture as figure 1 As shown, the electro-oxidation treatment process is as follows figure 2...
Embodiment 2
[0052] (1) Nickel foam (NF) is cleaned with dilute hydrochloric acid, deionized water and ethanol respectively, and is placed in the polytetrafluoroethylene reactor for subsequent use;
[0053] (2) Weigh nickel nitrate 5mmol and cobalt nitrate (wherein cobalt nitrate is 3% of nickel nitrate quality) and terephthalic acid 5mmol, dissolve in deionized water and N,N-dimethylformamide respectively;
[0054] (3) Pour the nickel nitrate and cobalt nitrate solutions and the terephthalic acid solution into the reaction kettle in step (2), and react at 180° C. for 24 hours to obtain NiCo (3%) BDC / NF;
[0055] (4) Wash the Co BDC / NF obtained in step (3) with deionized water and ethanol respectively, and dry for later use;
[0056] (5) Apply a voltage of 1.7V to the Co BDC / NF obtained in step (4), and electrooxidize it for 12 hours until the current is stable to obtain Ni x co 0.003x (OH) z / NF Catalyst. HRTEM picture as Figure 4 As shown, the electro-oxidation treatment process is...
Embodiment 3
[0060] (1) Nickel foam (NF) was ultrasonically cleaned with acid, deionized water and ethanol, respectively, as the working electrode to be deposited;
[0061] (2) Weigh 1 mmol of nickel nitrate and 1 mmol of iron nitrate, add them to 100 mL of deionized water, and obtain an electroplating solution for electrodeposition after ultrasonic dispersion;
[0062] (3) Under continuous magnetic stirring, place the working electrode to be deposited obtained in step (1) in the electroplating solution obtained in step (2), and perform electroplating at a constant potential of -1.4V (relative to the reversible hydrogen electrode). Deposition treatment, deposition electricity is 1C;
[0063] (4) After deposition, all electrodes were rinsed with ethanol and water respectively, and dried at 60° C. for 2 h to obtain a thermo-electrically coupled nickel-iron hydroxide water oxidation catalyst. Oxygen evolution performance test chart at different temperatures Figure 8 shown.
[0064] combin...
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