Preparation method of reduced graphene oxide loaded metal monatomic catalyst
A technology of loading metal and graphene, applied in the production of bulk chemicals, electrolysis components, electrodes, etc., can solve the problems of harsh conditions, difficult to scale preparation, etc., and achieve the effect of low cost, simple and safe operation process
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Embodiment 1
[0032] Preparation of reduced graphene oxide supported Nb single-atom catalysts:
[0033] Step 1, adding graphene oxide into dimethyl sulfoxide and ultrasonically dispersing to obtain a uniform graphene oxide dispersion (GO / DMSO) with a concentration of 4 mg / mL;
[0034] Step 2, in the glove box, prepare 2mg / mL of NbCl 5 / DMSO solution;
[0035] Step 3, take 4 mL of GO / DMSO solution in step 1, NbCl in step 2 5 / 150 μL of DMSO solution and 17 mL of DMSO solution, stirred and mixed evenly, transferred to a reaction kettle, and reacted at 140° C. for 12 hours. After the reaction, the product was collected by centrifugation, washed with absolute ethanol and deionized water in sequence to remove the residual DMSO solution, and the sample obtained after freeze-drying was the reduced graphene oxide-supported Nb single-atom catalyst.
[0036] figure 1 SEM image of the reduced graphene oxide-supported Nb single-atom catalyst, figure 2 The TEM image of the reduced graphene oxide-...
Embodiment 2
[0038] Preparation of reduced graphene oxide supported W single atom catalyst:
[0039] Step 1, adding graphene oxide into dimethyl sulfoxide and ultrasonically dispersing to obtain a uniform graphene oxide dispersion (GO / DMSO) with a concentration of 4 mg / mL;
[0040] Step 2, in the glove box, prepare 2mg / mL of WCl 5 / DMSO solution;
[0041] Step 3, take 4 mL of GO / DMSO solution in step 1, WCl in step 2 5 / 200 μL of DMSO solution and 17 mL of DMSO solution, stirred and mixed evenly, transferred to a reaction kettle, and reacted at 140°C for 11 hours. After the reaction, the product was collected by centrifugation, washed with absolute ethanol and deionized water in sequence to remove the residual DMSO solution, and the sample obtained after freeze-drying was the reduced graphene oxide supported W single-atom catalyst.
[0042] Figure 4High-angle annular dark-field-scanning transmission electron microscopy (HAADF-STEM) images of W single-atom catalysts supported on reduc...
Embodiment 3
[0044] Preparation of reduced graphene oxide-supported Mo single-atom catalysts:
[0045] Step 1, adding graphene oxide into dimethyl sulfoxide and ultrasonically dispersing to obtain a uniform graphene oxide dispersion (GO / DMSO) with a concentration of 4 mg / mL;
[0046] Step 2, in the glove box, prepare 2mg / mL of MoCl 5 / DMSO solution;
[0047] Step 3, take 4 mL of GO / DMSO solution in step 1, MoCl in step 2 5 / 200 μL of DMSO solution and 17 mL of DMSO solution, stirred and mixed evenly, transferred to a reaction kettle, and reacted at 140° C. for 12 hours. After the reaction, the product was collected by centrifugation, washed with absolute ethanol and deionized water in sequence to remove the residual DMSO solution, and the sample obtained after freeze-drying was the reduced graphene oxide-supported Mo single-atom catalyst.
[0048] Figure 4 High-angle annular dark-field-scanning transmission electron microscopy (HAADF-STEM) images of Mo single-atom catalysts supported...
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