▎ 摘　　要

NOVELTY - Preparation of transition metal nano-catalyst, involves (i) dissolving potassium sulfate or potassium bicarbonate in deionized water, preparing into 0.01-1 M solution, adding 0.5-5 g/l polyvinylpyrrolidone and 1-3 g/l ethanol, then adding transition metal electrodeposition precursor, ultrasonically dispersing into electrodeposition mixed solution, (ii) using pure copper sheet or carbon material as carrier to immerse in the electrodeposition mixed solution, using platinum sheet or graphite as the counter electrode, working electrode as the base, transparent conductive oxide, the substrate is a copper sheet or a carbon material, the reference electrode is silver/silver chloride or saturated calomel electrode, maintaining the deposition potential at -0.4 V to -3.5 V, electrodepositing at constant voltage, and maintaining the deposition time for 10-200 seconds, and (iii) collecting the transition metal catalyst after electrodeposition, and cleaning with deionized water. USE - Preparation of transition metal nano-catalyst used in photocatalytic reduction of carbon dioxide (claimed), electrocatalysis, and oxygen reduction. ADVANTAGE - The method is simple and only needs to add new electrodeposition precursor to continuously electrodeposit. The prepared catalyst has good performance.