Highly-dispersed support core-shell structure Pd @ Ni/WC direct alcohol fuel cell catalyst and preparation method thereof
A core-shell structure, fuel cell technology, applied in the direction of fuel cells, battery electrodes, structural parts, etc., can solve the problems of anode catalysts restricting the industrialization process of direct alcohol fuel cells, limited cost reduction, and poor stability. Facilitate large-scale production, reduce usage and cost, and not easy to agglomerate
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[0041] Example 1: Pd 2 @Ni 1 / WC 1.31 -900℃-3h(Pd 2 @Ni means the molar ratio of Pd and Ni is 2:1, WC 1.31 Indicates tungsten carbide, the mass ratio of tungsten source and carbon source is 1:1.31, the calcination temperature is 900℃, and the calcination time is 3h)
[0042] Weigh 1g of ammonium metatungstate, 1.31g of glucose dissolved in 80℃ deionized water, adjust pH=11 with NaOH, add 2g of SiO 2 Sol (diameter 20nm, mass fraction 40%), stirred at 80°C for 3h; dried at 120°C for 5h to obtain a solid precursor. Put the above precursor solid in a tube furnace, N 2 5℃min under the atmosphere -1 Program the temperature to 550℃ at a rate of 2℃min -1 The rate of heating is programmed to 900°C, the reaction is kept at a constant temperature for 3 hours, and it is naturally cooled to obtain the precursor composite material. The precursor composite material was placed in a 2M NaOH solution, stirred at 80°C for 12 hours, filtered, washed, and dried under vacuum at 80°C for 6 hours to obta...
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[0045] Example 2: Pd 3 @Ni 1 / WC 1.31 -900℃-3h(Pd 3 @Ni means the molar ratio of Pd and Ni is 3:1, WC 1.31 Indicates tungsten carbide, the mass ratio of tungsten source and carbon source is 1:1.31, the calcination temperature is 900℃, and the calcination time is 3h)
[0046] Weigh 1g of ammonium metatungstate, 1.31g of glucose dissolved in 80℃ deionized water, adjust pH=11 with NaOH, add 2g of SiO 2 Sol (diameter 20nm, mass fraction 40%), stirred at 80°C for 3h; dried at 120°C for 5h to obtain a solid precursor. Put the above precursor solid in a tube furnace, N 2 5℃min under the atmosphere -1 Program the temperature to 550℃ at a rate of 2℃min -1 The rate of heating is programmed to 900°C, the reaction is kept at a constant temperature for 3 hours, and it is naturally cooled to obtain the precursor composite material. The precursor composite material was placed in a 2M NaOH solution, stirred at 80°C for 12 hours, filtered, washed with suction, and dried in vacuum at 80°C for 6 hou...
Example Embodiment
[0049] Example 3: Pd 4 @Ni 1 / WC 1.31 -900℃-3h(Pd 4 @Ni refers to the molar ratio of Pd to Ni 4:1, WC 1.31 Indicates tungsten carbide, the mass ratio of tungsten source and carbon source is 1:1.31, the calcination temperature is 900℃, and the calcination time is 3h)
[0050] Weigh 1g of ammonium metatungstate, 1.31g of glucose dissolved in 80℃ deionized water, adjust pH=11 with NaOH, add 2g of SiO 2 Sol (diameter 20nm, mass fraction 40%), stirred at 80°C for 3h; dried at 120°C for 5h to obtain a solid precursor. Put the above precursor solid in a tube furnace, N 2 5℃min under the atmosphere -1 Program the temperature to 550℃ at a rate of 2℃min -1 The rate of heating is programmed to 900°C, the reaction is kept at a constant temperature for 3 hours, and it is naturally cooled to obtain the precursor composite material. The precursor composite material was placed in a 2M NaOH solution, stirred at 80°C for 12 hours, filtered, washed with suction, and dried in vacuum at 80°C for 6 hou...
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