▎ 摘　　要

NOVELTY - Nanometer metal composite adsorption material comprises nano-transition metals and carbon materials. The transition metal comprises nickel, preferably cobalt, and the content of nickel is 50-300 mg relative to 1 g of the carbon material. USE - The adsorption material is useful as adsorbent for adsorbing carbon monoxide (claimed). ADVANTAGE - The adsorption material: has adsorption capacity for carbon monoxide of not less than 76 ml/g and up to 112.9 l/g at normal temperature and pressure; and can adsorb carbon monoxide well. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for: preparing the adsorption material, comprising (1) soaking the carbon material with impregnation solution containing metal precursor, and drying to obtain solid product, (2) sintering the solid product to obtain sintered product under inert atmosphere, and (3) roasting the sintered product under reducing atmosphere, where the metal comprises nickel, preferably cobalt, and the amount of the metal precursor and carbon material makes the prepared nano-metal composite adsorption material, and the nickel content is 50-300 mg relative to 1 g of the carbon material; and carbon monoxide adsorption and desorption method, comprising (a) contacting carbon monoxide with the adsorbent to obtain the adsorbent, and (b) heating and/or vacuum extracting adsorbent obtained in the step (a), where the adsorbent is the nano-metal composite adsorption material or the nano-metal composite adsorption material prepared by the preparation method.