New insight into the enhanced activity of ordered mesoporous nickel oxide in formaldehyde catalytic oxidation reactions
Wang, HC; Guo, WQ; Jiang, Z; Yang, RO; Jiang, Z; Pan, Y; Shangguan, WF
2018
发表期刊JOURNAL OF CATALYSIS
ISSN0021-9517
卷号361页码:370-383
文章类型期刊论文
摘要Highly ordered mesoporous materials synthesized by a nanocasting method offer vast opportunities in catalytic applications. However, considerable debates remain as to the mechanism by which the mesoporous structure results in enhanced performance. We demonstrate new insights into the role of ordered mesoporous metal oxides in the catalytic oxidation reaction by preparing nickel (II) oxide (NiO) rather than a multiple valence compound such as Co3O4 as model catalyst. Mesoporous NiO using KIT-6 as a template (m-NiO-k) achieved total formaldehyde (HCHO) mineralization at 90 degrees C using oxygen (O-2) as oxidant, while bulk NiO (b-NiO-c) oxidized HCHO completely at 170 degrees C. Moreover, using ozone (O-3) as oxidant, m-NiO-k attained increased HCHO conversion by similar to 34% with a twofold increase in CO2 selectivity and a 100% O-3 decomposition rate. We conclude that the surface sodium functionalization of m-NiO significantly promotes the total oxidation of HCHO with O-2, likely via contribute to hydroxyl regeneration during reaction. Furthermore, the extra active oxygen species and undercoordinated NiO on the mesoporous surface owing to the properties of mesoporous structures contribute almost exclusively to the high activity and selectivity in the simultaneous catalytic removal of HCHO and O-3, which are also involved in the further enhanced activity for HCHO oxidation using m-NiO with O-2. These findings provide additional new insight into engineering efficient mesoporous metal oxides for VOCs catalysis under mild condition. Furthermore, they provide an innovative perspective on optimizing other reactions employing nanocast mesoporous catalysts. (C) 2018 Elsevier Inc. All rights reserved.
关键词Room-temperature Metal-oxides Benzene Oxidation Co Oxidation Ozone Surface Nio Oxygen Xps Decomposition
DOI10.1016/j.jcat.2018.02.023
收录类别SCI
语种英语
WOS记录号WOS:000431164500039
引用统计
文献类型期刊论文
条目标识符http://ir.sinap.ac.cn/handle/331007/29085
专题中科院上海应用物理研究所2011-2018年
作者单位1.Wang, HC
2.Guo, WQ
3.Jiang, Z
4.Yang, RO
5.Jiang, Z
6.Pan, Y
7.Shangguan, WF
推荐引用方式
GB/T 7714
Wang, HC,Guo, WQ,Jiang, Z,et al. New insight into the enhanced activity of ordered mesoporous nickel oxide in formaldehyde catalytic oxidation reactions[J]. JOURNAL OF CATALYSIS,2018,361:370-383.
APA Wang, HC.,Guo, WQ.,Jiang, Z.,Yang, RO.,Jiang, Z.,...&Shangguan, WF.(2018).New insight into the enhanced activity of ordered mesoporous nickel oxide in formaldehyde catalytic oxidation reactions.JOURNAL OF CATALYSIS,361,370-383.
MLA Wang, HC,et al."New insight into the enhanced activity of ordered mesoporous nickel oxide in formaldehyde catalytic oxidation reactions".JOURNAL OF CATALYSIS 361(2018):370-383.
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