Patent ID: 11965257
Assignee: HUANENG CLEAN ENERGY RESEARCH INSTITUTE
Field: Surface technology, coating (Chemistry)
Classification: CPC C  Y | IPC C

Claim 0:
1. A method for preparing a covalent organic framework (COF) protected electrode for electrolytic preparation of hydrogen, comprising:
mixing an organic framework and a small molecule organic acid at a molar ratio of 0.5:1 to 1:1 with a solvent, adding a polar aqueous solution containing a pretreated substrate thereto, mixing the solvent and the polar aqueous solution uniformly and heating the solution at a temperature of 100° C. to 150° C. under an inert atmosphere for 72 hours, filtering the solution to obtain precipitates, washing and drying the precipitates to obtain a structure COF film with a thickness of 10 nm to 100 nm grown on a surface of the substrate;
wherein a ratio of a mass of the organic framework and the small molecule organic acid to a volume of the solvent is 10 g:1 L to 30 g:1 L;
a volume ratio of the polar aqueous solution to the solvent is 1:4 to 1:6; a content of the pretreated substrate in the polar aqueous solution is 20 g/L to 60 g/L;
coating a protective layer on the COF film to obtain a substrate/COF/protective layer film; wherein a thickness of the protective layer is 10 nm to 100 nm;
etching off the substrate to obtain a COF/protective layer film;
washing the COF/protective layer film with deionized water for several times to obtain a mixed solution containing the COF/protective layer film, wherein the COF/protective layer film floats on a surface of the mixed solution;
transferring the COF/protective layer film to a surface of the electrode and removing the protective layer.