Facile synthesis of homogeneous hollow microsphere Cu-Mn based catalysts for catalytic oxidation of toluene.

Xiao, Zhe; Yang, Jingsi; Ren, Rui; Li, Jing; Wang, Ning; Chu, Wei

Facile synthesis of homogeneous hollow microsphere Cu-Mn based catalysts for catalytic oxidation of toluene.

Embargo End Date

2022-01-24

Type

Article

Authors

Xiao, Zhe
Yang, Jingsi
Ren, Rui
Li, Jing
Wang, Ning
Chu, Wei

KAUST Department

Physical Sciences and Engineering Division King Abdullah University of Science and Technology Thuwal, 23955-6900, Saudi Arabia.

Online Publication Date

2020-01-13

Print Publication Date

2020-05

Date

2020-01-13

Submitted Date

2019-09-14

Abstract

There emerges an urgent stipulation towards the enhanced toluene catalytic combustion nanocatalysts for whittling down the footprint of toluene, a notorious air pollutant. Unfortunately, Few materials which are currently made accessible both present the high catalytic performance lower than 250 °C and keep durable at elevated temperatures. Herein, we demonstrate an expeditious salt hydrolysis-driven redox-precipitation protocol wherein H+ donated by the hydrolysis of copper salt was used to initiate the regioselective reduction of KMnO4 by H2O2 under controlled redox kinetics in order to assemble the homogeneous mixed solid solution hollow microsphere Cu-Mn-based structure. Manifold characterization technologies unveil that in this unique nanbomicrosphere the abundant microscaled pores are successfully created across Cu-Mn bulks with fine-modulating the chemical properties. In sharp contrast with the compact counterparts without tailed porosity, the tuned crystallinity, accessed edge sites with the unsaturated coordination, fast redox chemistry, and boosted gaseous diffusion during reactions synergize to result in the signally good toluene oxidation, with the complete elimination activity at 252 °C, T90 at 237 °C, and prominent long-term durability under the stringent reaction atmospheres. Our current study ushers in an alternative and tractable arena to excogitate the porous oxide materials for multifarious catalysis implementations.

Citation

Xiao, Z., Yang, J., Ren, R., Li, J., Wang, N., & Chu, W. (2020). Facile synthesis of homogeneous hollow microsphere Cu–Mn based catalysts for catalytic oxidation of toluene. Chemosphere, 247, 125812. doi:10.1016/j.chemosphere.2020.125812

Acknowledgements

This work was financially supported by the National Natural Science Foundation of China (21872098). The authors greatly appreciate the technical support of Institute of New Energy and Low Carbon Technology.