Tutorial: structural characterization of isolated metal atoms and subnanometric metal clusters in zeolites

Lichen Liu, Miguel Lopez-Haro, Jose J. Calvino, Avelino Corma

Published: 2020-09-03 DOI: 10.1038/s41596-020-0366-9

subnanometric metal clusters

zeolites

STEM-iDPC imaging

catalytic reactions

structural characterization

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Supplementary information

Reporting Summary

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Supplementary information

Figure 1
Fig. 1: One-pot synthesis of Pt–zeolite materials.
Figure 2
Fig. 2: XRD patterns of the Pt–MFI zeolites with different chemical compositions.
Figure 3
Fig. 3: FESEM images of Pt–zeolite materials.
Figure 4
Fig. 4: HAADF–STEM images of K-free Pt@MFI-Air sample after calcination in air.
Figure 5
Fig. 5: HAADF–STEM images of K-Pt@MFI-Air sample after calcination in air.
Figure 6
Fig. 6: HAADF–STEM images of K-free Pt@MFI sample after calcination in air at 600 °C and then further reduction by H2 at 600 °C.
Figure 7
Fig. 7: HAADF–STEM images of K-Pt@MFI sample after calcination in air at 600 °C and then further reduction by H2 at 600 °C.
Figure 8
Fig. 8: STEM image of Pt–zeolite samples after reduction by H2 at 600 °C.
Figure 9
Fig. 9
Figure 10
Fig. 10: Stability test of the K-PtSn@MFI sample under the beam.
Figure 11
Fig. 11: Influence of defocus value on the imaging of isolated Pt atoms.
Figure 12
Fig. 12: Influence of defocus value on the imaging of isolated Sn atoms.
Figure 13
Fig. 13: Image simulation of isolated Pt and Sn atoms in MFI zeolite.
Figure 14
Fig. 14: Image simulation of Pt and Sn species in MFI zeolite.
Figure 15
Fig. 15: Image simulation of Pt and Sn species in MFI zeolite.
Figure 16
Fig. 16: Image simulation of Pt clusters comprising interaction with Sn species in MFI zeolite.
Figure 17
Fig. 17: Characterization of K-Pt@MFI-Air sample by STEM–iDPC imaging technique.
Figure 18
Fig. 18: Identification of the of subnanometric Pt clusters within the MFI structure.
Figure 19
Fig. 19: Correlation between the simulated image and experimental STEM–iDPC images.
Figure 20
Fig. 20: Chemical analysis on the K-PtSn@MFI sample by EDS.
Figure 21
Fig. 21: K-means clustering analysis on the simulated images.
Figure 22
Fig. 22: Distinguishing subnanometric Pt and Sn species by K-means clustering analysis.
Figure 23
Fig. 23: PtSn clusters in experimental HAADF–STEM images.
Figure 24
Fig. 24: Characterization of the Pt–zeolite materials after calcination in air by XAS.
Figure 25
Fig. 25: Characterization of Pt–zeolite materials by XAS.
Figure 26
Fig. 26: Comparison of the Sn-edge XAS results of K-PtSn@MFI-Air sample with Sn-Beta.
Figure 27
Fig. 27: CO-IR spectra of K-PtSn@MFI and K-Pt@MFI samples.

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Tutorial: structural characterization of isolated metal atoms and subnanometric metal clusters in zeolites

Supplementary information

Reporting Summary

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