Novel monolithic catalysts derived from in-situ decoration of Co3O4 and hierarchical Co3O4@MnOx on Ni foam for VOC oxidation

By Qian Zhao, Yanfei Zheng, Chunfeng Song, Qingling Liu, N. Ji, D. Ma, Xuebin Lu. 2020

269 citations recorded by the source corpus.

Abstract Monolithic Co3O4 and Co3O4@MnOx catalysts have been successfully prepared by in-situ growth. The morphology control and formation mechanism of Co3O4 on Ni foam was investigated in detail. Among the different samples, bamboo leaf-like Co3O4-NF-10 presented good catalytic activity for acetone oxidation (T50 = 179 °C, T90 = 193 °C), which was attributed to its low temperature reducibility, abundant Co3+ and surface adsorbed oxygen species (Oads). Therefore, Co3O4@MnOx-NF was further prepared to obtain abundant Co3+ and Oads species due to the redox reaction between MnO4− and Co2+. As expected, the Co3O4@MnOx-NF catalyst presented significantly improved activity for not only acetone but ethyl acetate and toluene oxidation compared to the Co3O4-NF-10. The high catalytic performance of Co3O4@MnOx-NF was ascribed to its good low-temperature reducibility, abundant Co3+ and Oads species. In addition, Co3O4@MnOx-NF presented a satisfactory cycle and long-term stability. This work shed light on the design of monolithic catalysts in VOC oxidation.

Subfields: Catalysis, Materials Chemistry, Mechanical Engineering

View Paper: https://www.semanticscholar.org/paper/3e83b0d9ceaff9b84c0613f7231152e05cebc353