期刊
APPLIED CATALYSIS B-ENVIRONMENTAL
卷 265, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.apcatb.2019.118552
关键词
Monolithic catalysts; Ni foam; Cobalt and manganese oxides; VOC oxidation
资金
- National Key Research Development Program of China [2016YFC0205300]
- National Engineering Laboratory for Mobile Source Emission Control Technology of China [NELMS2017A03]
- Natural National Science Foundation of China [21503144, 21690083]
- Tianjin Research Program of Ecological Environmental Treatment [18ZXSZSF00210, 18ZXSZSF00060]
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 (T-50 = 179 degrees C, T-90 = 193 degrees C), which was attributed to its low temperature reducibility, abundant Co3+ and surface adsorbed oxygen species (O-ads). Therefore, Co3O4@MnOx-NF was further prepared to obtain abundant Co3+ and O-ads 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 O-ads 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.
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