光电化学系列讲座(四) 2008-5-29
报告人:李星国 教授 北京大学化学与分子工程学院
李星国教授,1982年华中科技大学获学士学位,1990年 日本东北大学获博士学位。1993.10 ~ 1994.09 日本北海道工业研究所从事博士后工作,1994.10 – 1999. 9 日本岩手大学副教授,1999. 10 -2000. 3 日本岩手大学教授。1999年12月至今,北京大学化学与分子工程学院教授,无机化学所副所长,北京大学工学院材料系副主任、微米/纳米材料实验室 主任、华中科技大学等兼职教授。在 Nano Letter, APL, Chem. Mater., JPC, Langmuir等重要学术杂志上发表论文200余篇,申请了7项专利,其中2项获权,2项公开。研究方向为储氢材料、光催化制氢、氢分离、锂离子电池材料、微/纳米功能材料。曾主持和参加过多项自然科学基金、科技部、教育部、国防等项目。2000年获国家自然科学基金杰出青年基金,2002年获得日本材料技术研究协会外国人的特别奖,2005年获美国通用公司和基金委联合设立“GM中国科技成就奖”。
报告题目:Hydrogen storage properties of nanostructured Mg-based alloys and Prussian blue compounds
内容提要:
With fossil fuel being exhausted, hydrogen energy has attracted great attention,and as a result, hydrogen storage materials are receiving more and more interests as one of the important key materials for future clean energy systems.
We selected Mg-based alloys Mg2M (M= Ni, Co, Al, Cu, Fe) as a representation of chemisorption, which hydrogen absorption and desorption rates are higher and the equilibrium plateaus pressure and the temperature are lower compared with the conventional samples. For the physisorption, we selected ions with different valence to build frameworks with different pore sizes and studied their hydrogen adsorption. The results show that (1) for metal organic framework, the micro pore has strong effect to promote hydrogen adsorption; (2) when the pore diameter is in 0.24-0.32 nm, one pore can only hold one hydrogen molecule and the pore volume cannot be effectively utilized; (3) when the pore diameter is in 0.32-0.72 nm, one pore can hold more than one hydrogen molecules and MOF can adsorbs hydrogen twice of nitrogen monolayer adsorption