A single-atom alloy nanowire catalyst for carbon dioxide electroreduction and its preparation method
A technology of alloying nanometer and carbon dioxide, applied in the direction of nanotechnology, nanotechnology, nanotechnology for materials and surface science, to achieve the effect of high efficiency electrocatalytic activity, high selectivity, and reducing the amount of precious metals
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Embodiment 1
[0047] 1) Heat-treat copper nanowires with a diameter of 100 nm and an aspect ratio of 50 in air at 100° C. for 5 minutes, and then pickle them in 0.01 mol / L sulfuric acid for 10 minutes.
[0048] 2) Disperse the surface-treated 0.1 mmol copper nanowires in a 0.01 mol / L dimethyl dioctadecyl ammonium chloride solution in ethylene glycol.
[0049] 3) Inject 10 mL of silver nitrate solution with a concentration of 0.01 mol / L (the solvent is a 1:1 mixture of ethylene glycol and water) into the above-mentioned dispersion liquid using a micro-syringe pump, and the injection rate is 0.10 mL / min. Heat to 100°C for 30 minutes.
[0050] 4) The product is centrifuged, washed, and dried to obtain single-atom alloy nanowires.
[0051] Utilize the inductively coupled plasma spectrometer (ICP) to carry out component test to the monoatomic alloy nanowire catalyst that embodiment 1 makes, obtain component data result and see Table 1, as can be seen from Table 1, the silver single in the catal...
Embodiment 2
[0058] 1) Copper nanowires with a diameter of 10 nm and an aspect ratio of 500 were heat-treated in air at 50° C. for 30 minutes, and then pickled in 0.02 mol / L acetic acid for 8 minutes.
[0059] 2) Disperse 0.05 mmol of surface-treated copper nanowires in a 0.01 mol / L dimethyl dioctadecyl ammonium chloride solution in ethylene glycol.
[0060] 3) Inject 10 mL of silver nitrate solution with a concentration of 0.5 mol / L (the solvent is a 4:1 mixture of ethylene glycol and water) into the above dispersion liquid using a micro-injection pump at an injection rate of 10 mL / min, and heat the obtained solution React at 25°C for 5 minutes.
[0061] 4) The product is centrifuged, washed, and dried to obtain single-atom alloy nanowires.
Embodiment 3
[0063] 1) Copper nanowires with a diameter of 100nm and an aspect ratio of 50 were heat-treated in air at 200°C for 20min, and then pickled in 0.01mol / L nitric acid for 10s.
[0064] 2) Disperse 1 mmol surface-treated copper nanowires in n-hexane solution containing 0.01 mol / L surface covering agent (a mixture of cetyltrimethylammonium chloride and triphenylphosphine in equal mass).
[0065] 3) Inject 10 mL of silver nitrate solution containing 0.1 mol / L concentration (the solvent is a 5:1 mixture of ethylene glycol and water) into the above dispersion A using a micro-injection pump at an injection rate of 5 mL / min, and the obtained solution Heated to 150 ° C for 1 h.
[0066] 4) The product is centrifuged, washed, and dried to obtain single-atom alloy nanowires.
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