以电弧等离子体法制备纳米铜活性组分．将物理法制备的负载型纳米Ｃｕ／γ－Ａｌ２Ｏ３催化剂用于催化一氧化碳氧化反应，发现在催化过程中其催化活性呈规律性变化，即初始活性较低；空气中焙烧预处理易使纳米粒子长大．催化剂的氧化与一氧化碳还原实验表明，铜氧化物活性高于零价铜 Preparation of Copper Nanoparticles by Arc Plasma. The supported nano-Cu / γ-Al2O3 catalyst prepared by physical method was used to catalyze the oxidation of carbon monoxide. It was found that its catalytic activity showed a regular change in the catalytic process, ie, the initial activity was low. Pretreatment in air easily led to long nanoparticle length Big. Oxidation of the catalyst and carbon monoxide reduction experiments show that copper oxide activity is higher than zero-valent copper