A quenching modification method for improving the electrocatalytic performance of metal oxides and the prepared metal oxide electrocatalyst and application
A technology of oxide electricity and catalytic performance, applied in the direction of metal/metal oxide/metal hydroxide catalyst, physical/chemical process catalyst, fuel cell half-cell and primary battery half-cell, etc., can solve the problem of electricity Improved catalytic performance, complex synthesis steps, resource consumption, etc., to achieve the effect of low cost, simple method, and low overpotential
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Embodiment 1
[0071] (1) Add 2.622 g ammonium molybdate, 4.362 g nickel nitrate and 0.45 g urea into a 100 ml reaction kettle, then add 70 ml deionized water, stir for 30 minutes, and then react at 160 °C for 12 h. After cooling, the powder was separated with a centrifuge, washed alternately with deionized water and ethanol, and then dried under vacuum at 60 °C to obtain NiMoO 4 Precursor.
[0072] (2) Take 200 mg NiMoO 4 The precursor was placed in a muffle furnace, and the temperature was raised to 500 °C at a heating rate of 5 °C / min and kept constant for 2 h, then the powder was quickly taken out and placed in a container containing 1 M Fe(NO 3 ) 3 In the ice water solution, the Fe(NO 3 ) 3 The temperature of the ice-water solution was 0 °C and stirred for 1 h at a stirring speed of 700 rpm. Suction filtration was then performed to separate the powder, washed with a large amount of deionized water, and finally air-dried at 60°C, and recorded as NMO-Fe-1.
[0073] (3) The working e...
Embodiment 2
[0076] (1) Add 2.622 g ammonium molybdate, 4.362 g nickel nitrate and 0.45 g urea into a 100 ml reaction kettle, then add 70 ml deionized water, stir for 30 minutes, and then react at 160 °C for 12 h. After cooling, the powder was separated with a centrifuge, washed alternately with deionized water and ethanol, and then dried under vacuum at 60 °C to obtain NiMoO 4 Precursor.
[0077] (2) Take 200 mg NiMoO 4 The precursor was placed in a muffle furnace, and the temperature was raised to 500 °C at a heating rate of 5 °C / min and kept constant for 2 h, then the powder was quickly taken out and placed in a container containing 1 M Co(NO 3 ) 2 In the ice water solution, the Co(NO3 ) 2 The temperature of the ice-water solution was 0 °C and stirred for 1 h at a stirring speed of 700 rpm. Suction filtration was then performed to separate the powder, washed with a large amount of deionized water, and finally air-dried at 60°C, and recorded as NMO-Co-1.
[0078] (3) The working ele...
Embodiment 3
[0080] (1) Add 2.622 g ammonium molybdate, 4.362 g nickel nitrate and 0.45 g urea into a 100 ml reaction kettle, then add 70 ml deionized water, stir for 30 minutes, and then react at 160 °C for 12 h. After cooling, the powder was separated with a centrifuge, washed alternately with deionized water and ethanol, and then dried under vacuum at 60 °C to obtain NiMoO 4 Precursor.
[0081] (2) Take 200 mg NiMoO 4 The precursor was placed in a muffle furnace, and the temperature was raised to 500 °C at a heating rate of 5 °C / min and kept constant for 2 h, then the powder was quickly taken out, and placed in a 0.1 M Cr(NO 3 ) 3 In the ice water solution, the Cr(NO 3 ) 3 The temperature of the ice-water solution was 0 °C and stirred for 1 h at a stirring rate of 700 rpm. Suction filtration was then performed to separate the powder, washed with a large amount of deionized water, and finally air-dried at 60°C, and recorded as NMO-Cr-0.1.
[0082] (3) The working electrode was prep...
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