Catalytic elimination is an important technique to reduce the emission of atmospheric molecular contaminants (such as NO_x) efficiently. Selective catalytic reduction (SCR) is one of the most important nitrogen oxide (NO_x) control technologies in the world, and catalyst plays a greatly important role in SCR process. In this field, the novel catalysts and preparation methods have attracted more and more attention in recent years due to their excellent catalytic performance. It is well accepted that catalytic performance is significantly dependent on the supports, active sites, and interaction of support and active component of the catalysts. In this paper, we present a brief review on the preparation methods of different kinds of SCR catalysts in recent years and propose some perspectives for further development. Based on the report of published literatures, the structure–activity relationship between support and active sites is deeply analyzed. Meanwhile, we review the possible catalytic mechanism, and further clarify the nature of the catalytic reactions.

催化消除是一种有效减少大气分子污染物（如NO _x）排放的重要技术。选择性催化还原（SCR）是最重要的氮氧化物（NO _x）控制技术，催化剂在SCR过程中起着非常重要的作用。在该领域，由于其优异的催化性能，近年来新型催化剂和制备方法已引起越来越多的关注。公认的是，催化性能主要取决于载体，催化剂的活性位点以及载体与活性组分的相互作用。在本文中，我们对近年来各种SCR催化剂的制备方法进行了简要的综述，并提出了进一步发展的一些观点。根据已发表的文献报告，对支撑位和活性位之间的结构-活性关系进行了深入分析。同时，我们回顾了可能的催化机理，并进一步阐明了催化反应的性质。