Facile synthesis of a CuMnO x catalyst based on a mechanochemical redox process for efficient and stable CO oxidation

• Published in: Journal of materials chemistry. A, Materials for energy and sustainability Vol. 8; no. 46; pp. 24438 - 24444
• Main Authors: Bao, Jiafeng, Duan, Xiaolan, Zhang, Pengfei
• Format: Journal Article
• Language: English
• Published: 07.12.2020
• ISSN: 2050-7488; 2050-7496
• DOI: 10.1039/D0TA07304K

Considering the large amount of carbon monoxide produced by human activities causing serious problems to the environment, it can be seen that the low-temperature catalytic combustion of CO is a desirable route for CO removal. Herein, we reported an efficient and stable copper–manganese catalyst (CuMnO x -MR) based on a mechanochemical redox process. Interestingly, more oxygen vacancies and lattice defects emerged in CuMnO x -MR due to the molecular-scale redox reaction between Cu + and MnO 4 − . Meanwhile, the mechanochemical redox process was completed by solvent-free and rapid (1 h) ball milling. Moreover, the ball milling could continually break CuMnO x -MR particles to generate a high degree of interstitial porosity (up to 59 m 2 g −1 ). Compared with the control samples, CuMnO x -MR exhibited a lower catalytic temperature ( T 90 = 140 °C) in the CO oxidation reaction and performed well in the stability test (150 °C, 100 h). Finally, the CuMnO x -MR showed good resistance to H 2 O (4.2 vol% moisture, 100 h) and SO 2 (100 ppm), which suggests its potential for practical applications.