A carbon dioxide electrochemical reduction catalyst and its application in zero-distance reactor
A reactor and catalyst technology, applied in circuits, structural parts, electrical components, etc., can solve problems such as limitations and low energy utilization efficiency, and achieve the effects of improving electrochemical activity, simple preparation method and low price.
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Embodiment 1
[0035] The preparation of metal-organic framework catalyst precursor of copper: get 15.12g copper nitrate trihydrate and be dissolved in 80mL methanol solution and be referred to as A solution, then get 7.26g trimesic acid and 1.7g polyvinylpyrrolidone and dissolve together in The 80mL methanol solution is called B solution, and then slowly drop A solution into B solution with a disposable plastic dropper. After the drop is completed, put it into an ultrasonic machine for 30 minutes, take it out and let it stand for 5 hours. Then it was centrifuged with a centrifuge and washed three times with methanol, and the precipitate was dried in an oven at 60° C. for 12 hours. The obtained blue precipitate is the precursor of metal organic framework catalyst of copper, which is called CuBTC catalyst.
Embodiment 2
[0037]Grind the precursor prepared in Example 1 into powder with a mortar, put it into a quartz boat, and put the quartz boat into the quartz tube of the tube furnace, then pass nitrogen gas for 1 hour, and then at a rate of 20°C / min The temperature was raised to 300°C and maintained for 2h. After waiting for the temperature to drop to room temperature, take it out to obtain a black powder, which is the carbon dioxide electrochemical reduction catalyst, called CuMOF-20-300 catalyst. Compared with the existing reported metal-organic framework structure, the catalyst presents a porous sponge structure with more pores, which can improve the CO 2 Adsorption and diffusion and mass transfer of electrolysis gas products.
Embodiment 3
[0039] A gas diffusion electrode loaded with a carbon dioxide electrochemical reduction catalyst, wherein the gas diffusion electrode is loaded with the carbon dioxide electrochemical reduction catalyst described in Example 2.
[0040] The gas diffusion electrode is H-090 carbon paper electrode produced by Japan Toray Company with a size of 1.5cm×2cm. The preparation method of the gas diffusion electrode loaded with a carbon dioxide electrochemical reduction catalyst is as follows: disperse the metal organic framework of copper synthesized in 12 mg of Example 2 into 800 μL (99.7% by mass fraction) of isopropanol solution, add 80 mg of Nafion solution with a mass fraction of 5% was used to obtain a catalyst solution under the action of ultrasound. Use a micropipette to take the above catalyst solution and apply it on the gas diffusion electrode, put it in an oven and dry it at 60° C. for two hours, and obtain the gas diffusion electrode loaded with the carbon dioxide electroche...
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