Electron Microscopy Techniques to Study Structure/Function Relationships in Catalytic Materials

Mayoral, Álvaro; Ángel, P. Del; Ramos, Manuel

doi:10.1007/978-3-030-25993-8_5

Cited by 3 publications

(2 citation statements)

References 85 publications

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“…On the other hand, Pd-Ru catalysts presented the lowest difference between the nominal and actual Pd concentration, thus the concentration of Pd was higher than Ru, differences in metal content can be attributed to impregnation method [50,51]. TEM has proved to be a powerful tool very useful to understand the structure-function relationship in zeolitic supports [52]. In Fig.…”

Section: Fig 4 Sem Images Of Synthesized Fauy Zeolitementioning

confidence: 99%

Catalytic conversion of 5-hydroxymethylfurfural (5-HMF) over Pd-Ru/FAU zeolite catalysts

et al. 2021

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Section: Fig 4 Sem Images Of Synthesized Fauy Zeolitementioning

confidence: 99%

Catalytic conversion of 5-hydroxymethylfurfural (5-HMF) over Pd-Ru/FAU zeolite catalysts

et al. 2021

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“…Therefore, long-range techniques such as X-ray diffraction and Rietveld analysis do not always give the short-range information needed. In this sense, transmission electron microscopy is the most powerful methodology as it can provide direct visualization of the framework and the guest species at an atomic level together with crystallographic and chemical information. − All of these results have been achieved with thorough control of the electron dose, as zeolites are strongly beam sensitive. Working in the probe mode offers a quick scan, reducing the sample damage.…”

Section: Introductionmentioning

confidence: 99%

Direct Imaging and Location of Pb²⁺ and K⁺ in EMT Framework-Type Zeolite

et al. 2021

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The understanding of the structural framework and metal locations within zeolites are two critical aspects to tune and further exploit their properties as heterogeneous catalysts, advanced optical devices, or as water remediation materials. The development of electron microscopy has made it possible to observe directly the zeolitic framework and the distribution of extra framework cations within the pores at the atomic level. Here, we have studied the EMT framework providing data with an unprecedented spatial resolution, which have allowed the analysis of the FAU domains present in the framework. Additionally, potassium and lead (introduced by aqueous ion exchange), which were nonperiodically distributed in the pores have been located. An alternative image mode, annular bright field, has been used, proving its usefulness to extend the spatial resolution and increase the sensitivity toward light elements such as bridging oxygen. Finally, the combination of atomic imaging (local information) with the three-dimensional electron diffraction tomography analysis (averaged information) determined the lead-EMT crystal symmetry to be P6 3 mc.

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Ten Years of Aberration Corrected Electron Microscopy for Ordered Nanoporous Materials

Zhang

Mayoral

2020

ChemCatChem

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Ordered nanoporous materials including zeolites, zeotypes, and metal‐organic frameworks (MOFs) are widely used in the fields of heterogeneous catalysis, ion exchange and gas storage/separation. In addition, due to their particular structural features new applications are continuously being explored as a consequence of their well‐defined porous network, thermal stability, acidity and guest‐species confinement. All physicochemical properties are directly structure related and therefore characterization at atomic level is highly desired. In the current work, we have aimed to review the recent progress of electron microscopy science applied to the characterization of different nanoporous materials since the first work that made use of spherical aberration (Cs) corrected electron microscopy in 2010. All difficulties encountered for the application of this technique will be presented, together with the excellent degree of information that can be extracted and the scientific responses that only Cs‐corrected electron microscopy can provide in the area of nanoporous materials, zeolites, zeotypes and MOFs.

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Electron Microscopy Techniques to Study Structure/Function Relationships in Catalytic Materials

Cited by 3 publications

References 85 publications

Catalytic conversion of 5-hydroxymethylfurfural (5-HMF) over Pd-Ru/FAU zeolite catalysts

Catalytic conversion of 5-hydroxymethylfurfural (5-HMF) over Pd-Ru/FAU zeolite catalysts

Direct Imaging and Location of Pb²⁺ and K⁺ in EMT Framework-Type Zeolite

Ten Years of Aberration Corrected Electron Microscopy for Ordered Nanoporous Materials

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Electron Microscopy Techniques to Study Structure/Function Relationships in Catalytic Materials

Cited by 3 publications

References 85 publications

Catalytic conversion of 5-hydroxymethylfurfural (5-HMF) over Pd-Ru/FAU zeolite catalysts

Catalytic conversion of 5-hydroxymethylfurfural (5-HMF) over Pd-Ru/FAU zeolite catalysts

Direct Imaging and Location of Pb2+ and K+ in EMT Framework-Type Zeolite

Ten Years of Aberration Corrected Electron Microscopy for Ordered Nanoporous Materials

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Direct Imaging and Location of Pb²⁺ and K⁺ in EMT Framework-Type Zeolite