高效氨硼烷脱氢非贵金属催化剂的原子层沉积制备及性能研究

项目名称： 高效氨硼烷脱氢非贵金属催化剂的原子层沉积制备及性能研究

项目编号： No.21203229

项目类型： 青年科学基金项目

立项/批准年度： 2013

项目学科： 物理化学

项目作者： 陈朝秋

作者单位： 中国科学院山西煤炭化学研究所

项目金额： 27万元

中文摘要： 氨硼烷化合物具有超高的储氢容量（19.6 wt %），在车载储氢材料等领域具有广阔的应用前景。目前，制约其实际应用的关键因素之一是脱氢效率低，开发高效廉价的催化材料以促进氨硼烷在温和条件下快速水解脱氢具有重要意义。本项目拟利用原子层沉积(ALD)技术在控制纳米粒子组成、尺寸、分布及表面包覆等方面的独特优势，可控制备非贵金属（Ni，Co，Fe）纳米催化剂，研究粒子尺寸、分布及负载量等因素对其催化氨硼烷水解脱氢性能的影响规律；利用ALD技术可控制备双金属纳米粒子（Ni-Co、Ni-Fe、Co-Fe）、并在纳米粒子表面包覆多孔材料（Al2O3，SiO2），研究双金属纳米粒子组成、尺寸及结构、包覆层厚度和孔结构对催化剂催化氨硼烷脱氢活性和稳定性的影响；在上述研究基础上，进一步研究影响催化材料活性的关键因素以及活性中心的本质，并探讨催化反应机理，为设计和制备高效廉价的氨硼烷脱氢催化剂提供理论依据。

中文关键词： 多相催化；原子层沉积；非贵金属纳米催化剂；氨硼烷脱氢；协同作用

英文摘要： Ammonia-borane (NH3BH3, AB) complex has a hydrogen capacity of 19.6 wt %, making itself as an attractive candidate for on-board hydrogen-storage applications. One of the major challenges of the practical application of this system is to develop efficient, economical, and easily recyclable catalysts for further improving the kinetic and thermodynamic properties under moderate conditions. In this project, atomic layer deposition (ALD) technology will be introduced to prepare non-precious metal (Ni，Co，Fe) nanoclusters due to its great merits on the control of component , size and dispersion of nanoclusters in atomic-level. The effects of the component, size and dispersion of the non-precious matal nanoclusters on the catalytic performance for hydrolytic dehydrogenation of ammonia-borane will be investigated. And then, bimetal nanoclusters (Ni-Co, Ni-Fe, Co-Fe) will be fabricated and the non-precious metal nanoclusters will be coated by nanoporous Al2O3 or SiO2 via ALD technology in order to improve the activity and stability of the nanoclusters during the hydrolytic dehydrogenation process. The effects of component,size and structure of the bimetal nanoclusters, as well as the pore size and thickness of the coating layer, on the activity and stability for hydrolytic dehydrogenation of ammonia-borane will be investi

英文关键词： heterogeneous catalysis；atomic layer deposition；non-precious metal nanocatalysts；dehydrogenation of ammonia borane；Synergistic effect