Active sites in Cu-SSZ-13 deNOx catalyst under reaction conditions: a XAS/XES perspective

16th International Conference on X-ray Absorption Fine Structure

Lomachenko, Kirill A.^1,2 ; Borfecchia, Elisa^2 ; Bordiga, Silvia^2 ; Soldatov, Alexander V.^1 ; Beato, Pablo^3 ; Lamberti, Carlo^1,2

Southern Federal University, Zorge street 5, Rostov-on-Don

344090, Russia^1

Department of Chemistry and INSTM Reference Center, University of Turin, via P. Giuria 7, Turin

10125, Italy^2

Haldor Topsøe A/S, Nymøllevej 55, Kgs. Lyngby

2800, Denmark^3

关键词: Active catalyst;    Active site;    Catalytic properties;    Computational analysis;    Cu ions;    De-NOx catalysts;    Local environments;    Reaction conditions;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/712/1/012041/pdf
DOI  :  10.1088/1742-6596/712/1/012041

来源: IOP

【 摘 要 】

Cu-SSZ-13 is a highly active catalyst for the NH3-assisted selective catalytic reduction (SCR) of the harmful nitrogen oxides (NOx, x=1, 2). Since the catalytically active sites for this reaction are mainly represented by isolated Cu ions incorporated into the zeolitic framework, element-selective studies of Cu local environment are crucial to fully understand the enhanced catalytic properties of this material. Herein, we highlight the recent advances in the characterization of the most abundant Cu-sites in Cu-SSZ-13 upon different reaction-relevant conditions made employing XAS and XES spectroscopies, complemented by computational analysis. A concise review of the most relevant literature is also presented.