摘要
分别采用粉末冶金法和溶胶-凝胶法制备了高Nb-TiAl多孔合金载体及其钙钛矿型催化剂,并在模拟汽车尾气环境中研究了其气体催化性能。Ti-48Al-6Nb多孔合金骨架主要由α2和γ两相构成,孔隙率达到了39.5%,且为近全开孔多孔合金。用其作为载体,成功与LaMnO3催化剂进行了复合,并在B位分别掺杂了Sr和Pd元素。其中,少量的贵金属Pd能部分取代B位的离子而进入到钙钛矿晶格,并占据B位,在很大程度上降低起燃温度点,提高其催化转化效率。
In this work, Ti-48Al-6Nb porous alloys were fabricated by powder sintering and the structure and three-way catalytic property of a perovskite catalyst were evaluated. The skeletons of porous alloys consisted of α2 and γ phases, and the porosity was 39.5%. After successful compose with the LaMnO3 catalyst, elements Sr and Pd were doped into B site. In addition, a few Pd elements could replace the ion in B site and go into the perovskite lattice, resulting in reducing the ignition temperature and improving the catalytic conversion efficiency at great extent.
出处
《功能材料》
EI
CAS
CSCD
北大核心
2013年第18期2616-2619,共4页
Journal of Functional Materials
基金
国家重点基础研究发展计划(973计划)资助项目(2011CB605500)
北京市自然科学基金资助项目(52122043)
新金属材料国家重点实验室自主研究课题资助项目(2011Z-03)
