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240108s2023 xx |||||o 00| ||eng c |
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|a 10.1021/acs.chemmater.3c01632
|2 doi
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|a pubmed24n1247.xml
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|a (DE-627)NLM366526812
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|a (NLM)38162044
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|a DE-627
|b ger
|c DE-627
|e rakwb
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|a eng
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|a Redekop, Evgeniy A
|e verfasserin
|4 aut
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|a Zn Redistribution and Volatility in ZnZrOx Catalysts for CO2 Hydrogenation
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|c 2023
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|a Text
|b txt
|2 rdacontent
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|a ƒaComputermedien
|b c
|2 rdamedia
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|a ƒa Online-Ressource
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|2 rdacarrier
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|a Date Revised 03.01.2024
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|a published: Electronic-eCollection
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|a Citation Status PubMed-not-MEDLINE
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|a © 2023 The Authors. Published by American Chemical Society.
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|a ZnO-ZrO2 mixed oxide (ZnZrOx) catalysts are widely studied as selective catalysts for CO2 hydrogenation into methanol at high-temperature conditions (300-350 °C) that are preferred for the subsequent in situ zeolite-catalyzed conversion of methanol into hydrocarbons in a tandem process. Zn, a key ingredient of these mixed oxide catalysts, is known to volatilize from ZnO under high-temperature conditions, but little is known about Zn mobility and volatility in mixed oxides. Here, an array of ex situ and in situ characterization techniques (scanning electron microscopy/energy dispersive X-ray spectroscopy (SEM/EDX), transmission electron microscopy (TEM), powder X-ray diffraction (PXRD), X-ray absorption spectroscopy (XAS), X-ray photoelectron spectroscopy (XPS), Infrared (IR)) was used to reveal that Zn2+ species are mobile between the solid solution phase with ZrO2 and segregated and/or embedded ZnO clusters. Upon reductive heat treatments, partially reversible ZnO cluster growth was observed above 250 °C and eventual Zn evaporation above 550 °C. Extensive Zn evaporation leads to catalyst deactivation and methanol selectivity decline in CO2 hydrogenation. These findings extend the fundamental knowledge of Zn-containing mixed oxide catalysts and are highly relevant for the CO2-to-hydrocarbon process optimization
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|a Journal Article
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|a Cordero-Lanzac, Tomas
|e verfasserin
|4 aut
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|a Salusso, Davide
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Pokle, Anuj
|e verfasserin
|4 aut
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1 |
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|a Oien-Odegaard, Sigurd
|e verfasserin
|4 aut
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1 |
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|a Sunding, Martin Fleissner
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Diplas, Spyros
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Negri, Chiara
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Borfecchia, Elisa
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Bordiga, Silvia
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Olsbye, Unni
|e verfasserin
|4 aut
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| 773 |
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|i Enthalten in
|t Chemistry of materials : a publication of the American Chemical Society
|d 1998
|g 35(2023), 24 vom: 26. Dez., Seite 10434-10445
|w (DE-627)NLM098194763
|x 0897-4756
|7 nnns
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| 773 |
1 |
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|g volume:35
|g year:2023
|g number:24
|g day:26
|g month:12
|g pages:10434-10445
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|u http://dx.doi.org/10.1021/acs.chemmater.3c01632
|3 Volltext
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|a AR
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|d 35
|j 2023
|e 24
|b 26
|c 12
|h 10434-10445
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