A preparation method of rh nanoflower electrocatalyst for alkaline direct methanol fuel cell
A methanol fuel cell and catalyst technology, applied in battery electrodes, circuits, electrical components, etc., can solve problems such as dependence, and achieve the effects of high active sites, high yield, and high surface
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Embodiment 1
[0021] 0.5mL of 0.1mol / L RhCl 3 Aqueous solution, 0.5mL 0.5mol / L PEI aqueous solution with a number average molecular weight of 10000 was added to a 10mL beaker, mixed evenly, under stirring conditions, the resulting mixture was adjusted to pH 3 with 1mol / L aqueous HCl solution, and then 0.5mL (5.25mmol) diethylene glycol, where RhCl 3 The molar ratio with PEI and diethylene glycol is 1:5:105, and then transferred to the reaction kettle, and the reaction kettle was placed in an oven at 180°C for a closed reaction for 10 hours, cooled to room temperature, centrifuged, and washed with distilled water for 3~ 5 times, and dried in a vacuum oven at 60°C to obtain the Rh nanoflower electrocatalyst. Depend on figure 1 It can be seen that the four diffraction peaks are located at 41.068, 47.780, 69.877 and 84.393°, which are consistent with the standard card of the face-centered cubic (FCC) Rh crystal (JCPDS No. 05-0685) and no additional diffraction peaks are observed, indicating t...
Embodiment 2
[0024] 0.5mL of 0.1mol / L RhCl 3 Aqueous solution, 0.5mL 0.5mol / L PEI aqueous solution with a number average molecular weight of 8000 was added to a 10mL beaker, mixed evenly, under stirring conditions, the resulting mixed solution was adjusted to pH 4 with 1mol / L aqueous HCl solution, and then 0.475mL was added (5mmol) diethylene glycol, where RhCl 3 The molar ratio of PEI and diethylene glycol is 1:5:100, and then transferred to the reaction kettle, and the reaction kettle was placed in an oven at 200°C for 8 hours, cooled to room temperature, centrifuged, and washed with distilled water for 3~ 5 times, dried in a vacuum oven at 60°C to obtain the Rh nanoflower electrocatalyst (see Figure 7-8 ).
Embodiment 3
[0026] 0.5mL of 0.1mol / L RhCl 3 Aqueous solution, 0.5mL 0.5mol / L PEI aqueous solution with a number average molecular weight of 12000 was added to a 10mL beaker, mixed evenly, under stirring conditions, the resulting mixed solution was adjusted to pH 2 with 1mol / L aqueous HCl solution, and then 0.525mL (5.5mmol) diethylene glycol, where RhCl 3 The molar ratio with PEI and diethylene glycol is 1:5:110, and then transferred into the reaction kettle, put the reaction kettle in an oven at 160°C for 12 hours, cool to room temperature, centrifuge, wash with distilled water for 3~ 5 times, dried in a vacuum oven at 60°C to obtain the Rh nanoflower electrocatalyst (see Figure 9-10 ).
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