A simple seed-mediated growth method for the synthesis of highly morphology controlled CrOx/Ce0.2Zr0.8O2 catalysts and their enhanced NO oxidation

作者：Cai, Wei^*; Bu, Yunfei; Zhao, Yunxia; Chen, Mindong; Yu, Yang; Zhong, Qin

来源：Chemical Engineering Journal, 2017, 317: 376-385.

DOI：10.1016/j.cej.2017.02.048

• Oriented CrOx/Ce0.2Zr0.8O2
• Seed-mediated approach
• Dendritic shape
• Enriched surface exposed

A series of highly oriented CrOx/Ce0.2Zr0.8O2 nanoparticles were synthesized via a simple seed-mediated growth approach. The relationship between the catalytic oxidation capacity and morphology was evaluated by the oxidative denitrification (2NO + O-2 -> 2NO(2)). The results indicate that the addition of different seed helps to form the dendritic shape of CrOx/Ce0.2Zr0.8O2 catalysts. Among them, CCZ4-C3N4 (the g-C3N4 seed-mediated approach of CrOx/Ce0.2Zr0.8O2 catalysts) exhibited the best catalytic activity for the oxidation of NO, which reached 57.47% at 300 degrees C. The g-C3N4 seed makes Ce0.2Zr0.8O2 growing along the (1 1 1) face of itself, which can benefit for the surface enriched with Ce and Cr exposed. The exposed enriched surface structure promotes the generation of Ce3+ and Cr6+ on the surface, which enhances the NO oxidation capacity. The good dispersion of Cr species on the surface also leads to the high catalytic performance.

• 出版日期2017-6-1
• 单位南京信息工程大学; 南京理工大学