期刊
APPLIED SURFACE SCIENCE
卷 419, 期 -, 页码 399-408出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apsusc.2017.05.040
关键词
Greenhouse gas; Nitrous oxide; Mesoporous RE-NiO; N2O decomposition; Promoted-NiO; Rare earth oxides
类别
资金
- National Plan for Science, Technology and Innovation (MAARIFAH) - King Abdulaziz City for Science and Technology - the Kingdom of Saudi Arabia [12-ENV2756-03]
Recently, nickel oxide, NiO, promoted with various dopants showed an interesting activity behavior in N2O direct decomposition. In this paper, the activity of a series of rare earth (Nd, Pr, Tb and Y) doped NiO catalysts was investigated for this reaction. These catalysts have been prepared by the calcination of their corresponding oxalate mixtures, which have been synthesized via the microwave-assisted precipitation route using oxalic acid as precipitant. Characterization of the obtained catalysts was carried out by using various physico-chemical techniques including TGA, FT-IR, XRD, FE-SEM, TEM, TPR, XPS and electrical conductivity. The results obtained revealed the nanocrystalline nature of the prepared catalysts. Moreover, the presence of the various dopants has led to a noticeable decrease of the NiO crystallites size, mesoporosity development and an increase of its surface area and pore volume. There is a substantial activity increase upon doping NiO with the various rare earth oxides. Such activity increase is associated with the structural modifications as well as the electrical conductivity increase of these catalysts. (C) 2017 Elsevier B.V. All rights reserved.
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