A heterogeneous single Cu catalyst of Cu atoms confined in the spinel lattice of MgAl2O4 with good catalytic activity and stability for NO reduction by CO. Issue 12 (8th March 2019)

• Record Type: Journal Article
• Authors: Wu, Jichun; Li, Yuanzhi; Yang, Yi; Zhang, Qian; Yun, Li; Wu, Shaowen; Zhou, Chongyang; Jiang, Zhongkai; Zhao, Xiujian
• Is Part Of: Journal of materials chemistry. Volume 7:Issue 12(2019)
• Page Start: 7202
• Page End: 7212
• Publication Date: 2019-03-08
• Subjects: Materials -- Research -- Periodicals; Chemistry, Analytic -- Periodicals; Environmental sciences -- Research -- Periodicals; 543.0284
• DOI: 10.1039/c8ta11528a
• Languages: English
• ISSNs: 2050-7488

Abstract

Abstract : A heterogeneous single Cu catalyst exhibits good catalytic activity and durability at high temperature for NO reduction by CO due to the confinement effect of spinel lattice. Abstract : A heterogeneous single Cu catalyst of Cu atoms confined in the spinel lattice of MgAl2 O4 (Cu1 -MgAl2 O4 ) was prepared by a facile method. Cu1 -MgAl2 O4 exhibits catalytic activity for NO reduction by CO that is much higher than that of 1.0 wt% Pt/CeO2 . Moreover, Cu1 -MgAl2 O4 exhibits good catalytic stability at high reaction temperatures up to 700 °C during the long-term durability tests. The good stability is attributed to the confinement effect of the stable spinel lattice of Cu1 -MgAl2 O4 that stabilizes the confined Cu atoms. The high catalytic activity is attributed to the fact that oxygen bonding to Cu atoms of Cu1 -MgAl2 O4 participates in the oxidation of adsorbed CO with low activation energy, and the adsorption of NO on the resultant oxygen vacancies leads to the formation of N2 O with low activation energy, which subsequently decomposes to N2 .