The Potential of Cu-SAPO-44 in the Selective Catalytic Reduction of NOx with NH3

Ying Xin, Xiao Wang, Qian Li, Xicheng Ma, Yongxin Qi, Lirong Zheng, James A. Anderson, Zhaoliang Zhang*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

24 Citations (Scopus)
17 Downloads (Pure)


Nitrogen oxides (NOx) contribute much to acid rain, photochemical smog, and the depletion of tropospheric ozone. A novel, small-pore Cu-exchanged chabazite (Cu-CHA) zeolite, Cu-SAPO-44, was first studied for the selective catalytic reduction of NOx with ammonia (NH3-SCR), and exhibits excellent activity and N2 selectivity over the wide temperature window from 200–550 °C. The Cu content in Cu-SAPO-44 plays a significant role in the NH3-SCR reactions. Two kinds of isolated Cu2+ species inside the large cages and in the six-membered rings of the CHA structure were verified as the active sites, which are responsible for the low-temperature and high-temperature activity, respectively. Cu-SAPO-44 is shown to be a promising candidate as a SCR catalyst for deNOx with great potential in after-treatment systems for either mobile or stationary sources.

Original languageEnglish
Pages (from-to)3740-3745
Number of pages6
Issue number24
Early online date29 Nov 2016
Publication statusPublished - 19 Dec 2016

Bibliographical note


This work was supported by the National Natural Science Foundation of China (No. 21277060, 21477046, and 21547007), and the Open Project from Shandong Provincial Key Laboratory of Fluorine Chemistry and Chemical Materials.

Self Archiving policy:


  • active sites
  • EXAFS spectroscopy
  • heterogeneous catalysis
  • nitrogen oxides
  • zeolites


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