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Martini, A; Borfecchia, E; Lomachenko, K A; Pankin, I A; Negri, C; Berlier, G; Beato, P; Falsig, H; Bordiga, S; Lamberti, C
Chemical science, 10/2017, Letnik: 8, Številka: 10Journal Article
The small pore Cu-CHA zeolite is attracting increasing attention as a versatile platform to design novel single-site catalysts for deNO applications and for the direct conversion of methane to methanol. Understanding at the atomic scale how the catalyst composition influences the Cu-species formed during thermal activation is a key step to unveil the relevant composition-activity relationships. Herein, we explore by XAS the impact of Cu-CHA catalyst composition on temperature-dependent Cu-speciation and reducibility. Advanced multivariate analysis of XANES in combination with DFT-assisted simulation of XANES spectra and multi-component EXAFS fits as well as FTIR spectroscopy of adsorbed N allow us to obtain unprecedented quantitative structural information on the complex dynamics during the speciation of Cu-sites inside the framework of the CHA zeolite.
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Leto | Faktor vpliva | Izdaja | Kategorija | Razvrstitev | ||||
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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in: SICRIS
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