机构地区: 华南理工大学环境科学与工程学院环境科学与工程系
出 处: 《稀土》 2003年第2期53-56,共4页
摘 要: 往机动车排气催化剂中添加稀土元素、碱金属和碱土金属,是车用催化剂优化设计中关键一环。通常添加物的改性作用表现在,提高催化剂或载体的耐热性,拓宽催化剂的氧化还原窗口,提高催化剂的抗中毒能力,以及改善催化剂的活性和选择性等。文章重点介绍了Ce、La、Ba等元素,并对添加物的研究与开发提出了展望。 Rare earth elements, alkali metals and alkaline earth metals are always added into the automotive catalysts, which process plays a critical role in optimal design of automotive catalysts Generally, additives can modify the catalysts in many ways, including improving the thermal durability of catalysts or supports, widening the redox window, promoting the resistance from being poisoning, and enhancing the activity and selectivity, etc Additives are discussed with the focus on the elements of cerium, lanthanum and barium
领 域: [环境科学与工程]