Composite electrocatalyst, preparation method and application thereof
An electrocatalyst and polymer technology, applied in electrodes, electrolysis components, electrolysis processes, etc., can solve the problems of low catalytic efficiency and low activity, and achieve the effect of accelerating the reaction rate, improving the utilization efficiency, and enriching the nano-scale porous structure.
Pending Publication Date: 2021-11-16
SHENZHEN UNIV
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[0005] In view of the above deficiencies in the prior art, the object of the present invention is to provide a composite electrocatalyst and its preparation method and application, aiming to solve the problems of low activity and low catalytic efficiency of the existing electrochemical carbon dioxide reduction catalyst
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Embodiment 1
[0090] Add 22.7g of dimethylimidazole to 80mL of deionized water, stir at room temperature for 15min to obtain solution A, then add 1.17g of zinc nitrate hexahydrate to 8mL of deionized water, and stir at room temperature for 15min to obtain solution B, then B was quickly added to solution A, stirred at room temperature for 30 minutes to obtain a white solid mixture, the white solid was extracted by repeated centrifugation (10000rpm, 10min) and washed with deionized water three times, and then the white solid was placed in a vacuum oven at 65 °C Dry for 12h to get ZIF-8.
[0091] Mix 1.6g polyacrylonitrile (Mw=150000) with 20mL N-N dimethylformamide, stir magnetically at 500rpm in a water bath at 60°C for 2h, then add 0.6g ZIF-8 and 20mg dihydrate nitric acid Palladium was added to the above solution, then magnetically stirred at a stirring rate of 500 rpm for 2 hours under the condition of a water bath at 60° C., and then magnetically stirred at a stirring rate of 500 rpm for...
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The invention discloses a composite electrocatalyst, a preparation method and application thereof. The preparation method of the composite electrocatalyst comprises the steps: providing a polymer, a zinc metal organic framework material and a metal salt, wherein the boiling point of the metal in the metal salt is higher than that of zinc; adding the polymer, the zinc metal organic framework material and the metal salt into an organic solvent, and stirring to obtain a mixed solution; performing electrostatic spinning on the mixed solution to obtain a precursor fiber compound; and carrying out pre-oxidation treatment, carbonization treatment and purification treatment on the precursor fiber compound to obtain the composite electrocatalyst comprising porous carbon nanofibers and metal monoatoms loaded on the porous carbon nanofibers. According to the invention, the metal monatomic is used as an active site for electrocatalytic reduction of carbon dioxide, and carbon nanofiber has a rich nanoscale porous structure, so that the utilization efficiency of the active site of the metal monatomic is improved, charge transmission is facilitated, and high-efficiency electrocatalytic reduction of carbon dioxide is realized.
Description
technical field [0001] The invention relates to the field of electrochemical reduction of carbon dioxide, in particular to a composite electrocatalyst and its preparation method and application. Background technique [0002] Excessive consumption of fossil fuels, resulting in atmospheric CO 2 The content of the pollution continues to rise, which has caused a series of environmental problems and seriously hindered the sustainable development of the social economy. There is an urgent need for clean and economical methods to reduce CO 2 into beneficial fuels or other chemicals while reducing atmospheric CO 2 content. Among them, CO 2 Electrochemical reduction is considered as a potential pathway for carbon cycling and production of sustainable fuels. Can use renewable energy sources (solar, wind, tidal, etc.) to provide CO 2 The electrons required for electrochemical reduction are simultaneously converted from intermittent electrical energy of renewable energy into chemic...
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Login to View More IPC IPC(8): C25B11/031C25B1/23C25B11/042
CPCC25B11/031C25B1/23C25B11/042
Inventor 何传新王思雨杨恒攀胡琪
Owner SHENZHEN UNIV