新一代三效催化剂的关键材料─Ce_xZr_(1-x)O_2固溶体研究进展

Recent Advances in Development of New Generation of Three-way Catalysts: Use of Ce_xZr_(1-x)O_2 Solid Solution as Key Material

汽车尾气排放法规的日趋严格迫切要求开发高性能的三效催化剂。传统三效催化剂中的CeO2 高温下易发生烧结而降低或失去储氧能力。而加入锆所形成的CexZr1 -xO2 固溶体具有良好的抗高温老化性能、低温还原性能和较高的储氧能力 ,可以作为新一代三效催化剂的关键材料。

Traditional automotive exhaust catalysts are reviewed with respect to pure ceria (CeO 2). This paper reports on the endeavors in improvement of heat stabilization of CeO 2 in recent years, i.e., formation of Ce xZr 1 x O 2 solid solution by introducing Zr 4+ into CeO 2 lattice. Due the high thermo resistance, high reduction efficiency at low temperature and good oxygen storage capacity (OSC), Ce xZr 1 x O 2 solid solution is hopefully becoming a key material for new generation of three way catalysts (TWC).