Ce-Ti Amorphous Oxides for Selective Catalytic Reduction of NO with NH3: Confirmation of Ce-O-Ti Active Sites
Li, P; Xin, Y; Li, Q; Wang, ZP; Zhang, ZL; Zheng, LR;郑黎荣
刊名ENVIRONMENTAL SCIENCE & TECHNOLOGY
2012
卷号46期号:17页码:9600-9605
学科分类Engineering; Environmental Sciences & Ecology
DOI10.1021/es301661r
英文摘要The amorphous Ce-Ti mixed oxides were reported to be catalysts for selective catalytic reduction of NOx with NH3, in which Ce and not Ti acts as their solvent in spite of the fact that Ce is low in content. The amorphous catalysts were characterized by X-ray powder diffraction (XRD) and transmission electron microscopy (TEM) equipped with selective area electron diffraction (SAED). The Ce-Ti amorphous oxide shows higher activity than its crystalline counterpart at lower temperatures. Moreover, the presence of small CeO2 crystallites as for the impregnated sample is deleterious to activity. The Ce-O-Ti short-range order species with the interaction between Ce and Ti in atomic scale was confirmed for the first time to be the active site using temperature programmed reduction with H-2 (H-2-TPR), in situ FTIR spectra of NO adsorption, X-ray photoelectron spectroscopy (XPS), and X-ray absorption fine-structure (XAFS). Lastly, the Ce-O-Ti structure was directly observed by field-emission TEM (FETEM).
收录类别SCI
WOS记录号WOS:000308260700048
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被引频次:118[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/224318
专题中国科学院高能物理研究所_多学科研究中心_期刊论文
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Li, P,Xin, Y,Li, Q,et al. Ce-Ti Amorphous Oxides for Selective Catalytic Reduction of NO with NH3: Confirmation of Ce-O-Ti Active Sites[J]. ENVIRONMENTAL SCIENCE & TECHNOLOGY,2012,46(17):9600-9605.
APA Li, P,Xin, Y,Li, Q,Wang, ZP,Zhang, ZL,&Zheng, LR;郑黎荣.(2012).Ce-Ti Amorphous Oxides for Selective Catalytic Reduction of NO with NH3: Confirmation of Ce-O-Ti Active Sites.ENVIRONMENTAL SCIENCE & TECHNOLOGY,46(17),9600-9605.
MLA Li, P,et al."Ce-Ti Amorphous Oxides for Selective Catalytic Reduction of NO with NH3: Confirmation of Ce-O-Ti Active Sites".ENVIRONMENTAL SCIENCE & TECHNOLOGY 46.17(2012):9600-9605.
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