A nanofiber membrane for CO2 reduction and a preparation method and application thereof

Abstract

The application provides a nanofiber membrane for CO2 reduction and a preparation method and application thereof, and belongs to the field of electrocatalytic reduction of CO2. The nanofiber membrane has a porous structure, the average pore diameter of the nanofiber membrane is 1.8-2.5 mu m, the porosity is 42%-50%, and the thickness of the nanofiber membrane is 20-60 mu m. The nanofiber membrane is a three-dimensional network structure built by a plurality of extremely fine fibers and full of nanoscale pores, and can significantly improve the ethylene Faraday efficiency and product selectivity in the process of electro-reduction of CO2. The application further provides a preparation method of the nanofiber membrane, the porous nanofiber membrane is obtained by using natural cellulose, by a mechanical dissociation method and by optimizing the membrane thickness and the interface microenvironment, and has good ion conductivity and gas barrier capacity, and the ethylene Faraday efficiency of the nanofiber membrane is more than 70% at 700 mA cm ‑2 , which is more than 10% higher than that of a traditional anion exchange membrane system.

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