乙炔等离子体法制备Mg-Al纳米颗粒及其储氢性能研究

Synthesis and Hydrogen Storage Properties of the Mg-Al Nanoparticles by Acetylene Plasma Metal Reaction

镁基储氢材料的理论储氢容量高（7.6wt%H2），被认为是最具应用前景的储氢材之一。为发展电网氢储能用储氢材料以解决可再生能源发电的随机性和间歇性对电网产生的冲击，采用乙炔等离子体法制备Mg50Al50/C纳米颗粒，重点研究碳层及Al催化剂的引入对于 Mg 纳米颗粒尺寸及其储氢性能的影响。研究表明，乙炔等离子体法制备的 Mg 纳米颗粒尺寸主要分布在30～40 nm处，平均颗粒尺寸只有33 nm，同时添加的碳及Al催化剂抑制了颗粒表面的氧化，使吸放氢动力学明显提高。

Magnesium based hydrogen storage materials are considered to be one of the most promising hydrogen storage materials due to their high hydrogen storage capacity （7.6wt%H2）. In order to develop hydrogen storage material in power system to solve the impact of the stochastic feature and intermittence of renewable energy generation upon the power grid, the Mg50Al50/C nanoparticles have been prepared by acetylene plasma. The paper focused on the impact of the carbon shell and Al catalyst on the size and hydrogen storage properties of the Mg nanoparticles. The results showed that the Mg nanoparticles prepared by acetylene plasma mainly range from 30-40 nm and have an average size of 33 nm. The surface oxidation was strongly suppressed by the addition of carbon and Al catalyst, which enhanced hydrogenation and dehydrogenation kinetics.