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Porous Cu-Mn-O catalysts fabricated by spray pyrolysis method for efficient CO oxidation
Zhou, Yang; Liu, Xiaoyuan; Wang, Ke; Li, Jing; Zhang, Xinglai; Jin, Xin; Tang, Xinyue; Zhu, Xiuhui; Zhang, Ruishi; Jiang, Xin; Liu, Baodan
2019-03-01
Source PublicationRESULTS IN PHYSICS
ISSN2211-3797
Volume12Pages:1893-1900
AbstractSeries of "Hopcalite" catalysts for low-temperature CO oxidation are prepared through a facile ultra-sonic spray pyrolysis approach. It has been found that the spray pyrolysis temperature and Cu/Mn atomic ratio in initial precursors show significant impacts on the catalytic activity of Cu-Mn-O catalysts. The catalyst synthesized at 550 degrees C with Cu/Mn = 1/2 in precursor (Cul Mn2-550) shows the highest catalytic activity towards CO oxidation (T-100 = 63 degrees C; E-a = 17.04 KJ mol(-1)), owing to the formation of CuMn2O4 phase with poor crystallinity. The synergistic effect of Cu and Mn species in spinel Cu-Mn-O phases attributes to the evaluated catalytic activity compared with those of pure oxides of copper or manganese towards CO oxidation. The results reveal that Cul Mn2-550 not only provides more defects and vacancies to create more active sites, but also generates more highly active Cu (II) to promote CO oxidation. On the contrary, the decreasing amount of Cu (II) and the higher degree of crystallinity resulting from higher synthesis temperature lead to the deterioration of catalytic activity. Moreover, the phase transformation among the Cu(x)Mn(3-x)O(4 )spinels also shows significant effect on CO conversion rate. Finally, the formation mechanism of Cu-Mn-O catalysts and related CO oxidation process are discussed based on series of characterizations.
KeywordSpray pyrolysis Cu-Mn-O catalysts CO oxidation Porous nanostructures Synergistic effect
Indexed BySCI
Language英语
WOS IDWOS:000460704700275
PublisherELSEVIER SCIENCE BV
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/81312
Collection中国科学院金属研究所
Recommended Citation
GB/T 7714
Zhou, Yang,Liu, Xiaoyuan,Wang, Ke,et al. Porous Cu-Mn-O catalysts fabricated by spray pyrolysis method for efficient CO oxidation[J]. RESULTS IN PHYSICS,2019,12:1893-1900.
APA Zhou, Yang.,Liu, Xiaoyuan.,Wang, Ke.,Li, Jing.,Zhang, Xinglai.,...&Liu, Baodan.(2019).Porous Cu-Mn-O catalysts fabricated by spray pyrolysis method for efficient CO oxidation.RESULTS IN PHYSICS,12,1893-1900.
MLA Zhou, Yang,et al."Porous Cu-Mn-O catalysts fabricated by spray pyrolysis method for efficient CO oxidation".RESULTS IN PHYSICS 12(2019):1893-1900.
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