Multi-modal surface analysis of porous films under operando conditions

Practical catalysts with a porous framework, such as zeolites, host catalytic reactions at active sites engrained in the pores and channels of the scaffold. The mechanism of interaction at these active sites, defining catalyst performance, remains elusive, in large part, due to the lack of surface c...

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Bibliographic Details
Published in:AIP advances 2020-08, Vol.10 (8), p.085109-085109-11
Main Authors: Eads, Calley N., Zhong, Jian-Qiang, Kim, Donghun, Akter, Nusnin, Chen, Zhihengyu, Norton, Angela M., Lee, Veronica, Kelber, Jeffry A., Tsapatsis, Michael, Boscoboinik, J. Anibal, Sadowski, Jerzy T., Zahl, Percy, Tong, Xiao, Stacchiola, Dario J., Head, Ashley R., Tenney, Samuel A.
Format: Article
Language:English
Subjects:
Bilayers
Catalysts
Catalytic activity
Film growth
Reaction mechanisms
Selectivity
Silicon dioxide
Surface analysis (chemical)
Surface properties
Thick films
Thin films
Zeolites
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Summary:Practical catalysts with a porous framework, such as zeolites, host catalytic reactions at active sites engrained in the pores and channels of the scaffold. The mechanism of interaction at these active sites, defining catalyst performance, remains elusive, in large part, due to the lack of surface characterization methods available for thick films or powders. Here, we present thin film analogs of practical catalysts that allow for the implementation of surface characterization tools, including advanced microscopy and operando spectroscopy methodologies. Specifically, we investigated bilayer silica, MFI nanosheets, and UiO-66 thin films using a multi-modal approach addressing film growth, characterization, and gas adsorption aimed at understanding catalytic activity, reactivity, and selectivity properties, as defined by molecular-level changes in the reaction mechanism.
ISSN:2158-3226
2158-3226
DOI:10.1063/5.0006220