Method for promoting electro-catalytic oxidation of methane to generate chloromethane by using chloride ions
A technology for electrocatalytic oxidation and chloromethane, which can be used in methane capture, electrolytic organic production, electrodes, etc., and can solve problems such as high price
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Embodiment 1
[0024] Embodiment 1, the preparation of cobalt-nickel oxide electrocatalyst, concrete steps are as follows:
[0025] Cobalt-nickel mixed oxide nanoparticles with a ratio of 1:1 were synthesized by a hydrothermal method, and the morphology of the nanoparticles was as follows figure 2 shown. 1mmolCo(OAc) 2 4H 2 O and 1 mmol Ni(OAc) 2 4H 2 O was dissolved in 25 mL of deionized water. Add 2.5 mL of 30% ammonia water to the solution, and stir vigorously with oxygen for at least 10 min. The solution was then transferred to a 50 mL autoclave at 150 o C under reaction 3h. The precipitate was separated by centrifugation and washed several times with deionized water. at 80 o After drying at C, the catalyst was heated at 350 o C was calcined in air for 2h.
Embodiment 2
[0026] Embodiment 2, the preparation of cobalt oxide electrocatalyst, concrete steps are as follows:
[0027] Cobalt oxide nanoparticles were synthesized by a hydrothermal method. 2 mmol Co(OAc) 2 4H 2 O was dissolved in 25 mL of deionized water. Add 3.0 mL of 30% ammonia water to the solution, and stir vigorously with oxygen for at least 10 min. The solution was then transferred to a 50 mL autoclave at 120 o C for 4 h. The precipitate was separated by centrifugation and washed several times with deionized water. at 100 o After drying at C, the catalyst was heated at 300 o C was calcined in air for 2 h.
Embodiment 3
[0028] Embodiment 3, using chlorine ions in the electrolyte to promote the electrocatalytic oxidation of methane to generate methyl chloride, the specific steps are as follows:
[0029] The above catalysts were ultrasonically dispersed in isopropanol solution. Spray polytetrafluoroethylene emulsion, catalyst dispersion and conductive carbon black evenly on the carbon paper layer by layer, and control the catalyst loading to 1mg / cm 2 , and dry the electrode under an infrared lamp as a catalytic reaction electrode. The electrodes were then installed in the electrolytic cell, and the tests were performed at room temperature and pressure. With this electrode as the anode, the flow rate of methane gas was controlled to be 20 mL / min. Saturated NaCl was used as the electrolyte, and the flow rate of the electrolyte was controlled at 10 mL / min. With silver / silver chloride as the reference electrode, a controlled voltage of 1.8–2.5 V was applied. Methane is selectively oxidized to m...
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