▎ 摘　　要

NOVELTY - The carbon nanotube-based porous hollow fiber electrode for electro-catalytic reduction reaction, comprises a self-supporting porous hollow fiber tubular structure. The outer diameter of the tube is 500-1500 μm. The tube wall is a staggered mesh structure. The wall thickness is 50-600 μm, the porosity is 50-95%, and the inner cavity is ventilated. The micro-nano bubbles with a size of 10 nm-20 μm are formed. The electrode is mainly composed of single-walled carbon nanotubes, multi-walled carbon nanotubes, oxidation modified carbon nanotubes, and elements of nitrogen, phosphorus, sulfur, and fluorine doped with carbon nanotubes. The catalysts of metal, metal oxide, rare earth element, graphene, carbon quantum dot, graphyne, porous carbon, mxene, and metal organic framework (MOF) are loaded on the carbon nanotube-based porous hollow fiber electrode. USE - Carbon nanotube-based porous hollow fiber electrode used as working electrode for applying constant potential or current to electrocatalytic reduction reaction of oxygen, carbon dioxide and nitrogen (claimed). ADVANTAGE - The carbon nanotube-based porous hollow fiber electrode has high reactivity, high efficiency and good stability for the electroreduction of oxygen, carbon dioxide and nitrogen, and is an electroreduction electrode with excellent performance and low price, and is easy to realize large-scale application.