Assessment of the location of Pt nanoparticles in Pt/zeolite Y/γ‑Al2O3 composite catalysts

Jogchum Oenema, Jan Philipp Hofmann, Emiel Hensen, Jovana Zecevic (Corresponding author), Krijn P. de Jong (Corresponding author)

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The location of Pt nanoparticles was studied in Pt/zeolite Y/γ-Al 2O 3 composite catalysts prepared by H 2PtCl 6 ⋅ 6H 2O (CPA) or Pt(NH 3) 4(NO 3) 2 (PTA) as Pt precursors. The aim of this study is to validate findings from Transmission Electron Microscopy (TEM) by using characterization techniques that sample larger amounts of catalyst per measurement. Quantitative X-ray Photoelectron Spectroscopy (XPS) showed that the catalyst prepared with CPA led to a significantly higher Pt/Al atomic ratio than the catalyst prepared with PTA confirming that the 1-2 nm sized Pt nanoparticles in the former catalyst were located on the open and mesoporous γ-Al 2O 3 component, whereas they were located in the micropores of zeolite Y in the latter. By using infrared spectroscopy, a shift in the absorption band maximum of CO chemisorbed on Pt nanoparticles was observed, which can be attributed to a difference in electronic properties depending on the support of the Pt nanoparticles. Finally, model hydrogenation experiments were performed using β-phenylcinnamaldehyde, a reactant molecule with low diffusivity in zeolite Y micropores, resulting in a 5 times higher activity for the catalyst prepared by CPA compared to PTA. The combined use of these characterization techniques allow us to draw more robust conclusions on the ability to control the location of Pt nanoparticles by using either CPA or PTA as precursors in zeolite/γ-Al 2O 3 composite catalyst materials.

Originele taal-2Engels
Pagina's (van-tot)615-622
Aantal pagina's8
TijdschriftChemCatChem
Volume12
Nummer van het tijdschrift2
DOI's
StatusGepubliceerd - 18 jan 2020

Vingerafdruk

Zeolites
Nanoparticles
catalysts
nanoparticles
Catalysts
composite materials
Composite materials
Carbon Monoxide
Electronic properties
Hydrogenation
hydrogenation
diffusivity
Absorption spectra
Infrared spectroscopy
X ray photoelectron spectroscopy
infrared spectroscopy
photoelectron spectroscopy
Transmission electron microscopy
absorption spectra
transmission electron microscopy

Citeer dit

Oenema, Jogchum ; Hofmann, Jan Philipp ; Hensen, Emiel ; Zecevic, Jovana ; de Jong, Krijn P. / Assessment of the location of Pt nanoparticles in Pt/zeolite Y/γ‑Al2O3 composite catalysts. In: ChemCatChem. 2020 ; Vol. 12, Nr. 2. blz. 615-622.
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abstract = "The location of Pt nanoparticles was studied in Pt/zeolite Y/γ-Al 2O 3 composite catalysts prepared by H 2PtCl 6 ⋅ 6H 2O (CPA) or Pt(NH 3) 4(NO 3) 2 (PTA) as Pt precursors. The aim of this study is to validate findings from Transmission Electron Microscopy (TEM) by using characterization techniques that sample larger amounts of catalyst per measurement. Quantitative X-ray Photoelectron Spectroscopy (XPS) showed that the catalyst prepared with CPA led to a significantly higher Pt/Al atomic ratio than the catalyst prepared with PTA confirming that the 1-2 nm sized Pt nanoparticles in the former catalyst were located on the open and mesoporous γ-Al 2O 3 component, whereas they were located in the micropores of zeolite Y in the latter. By using infrared spectroscopy, a shift in the absorption band maximum of CO chemisorbed on Pt nanoparticles was observed, which can be attributed to a difference in electronic properties depending on the support of the Pt nanoparticles. Finally, model hydrogenation experiments were performed using β-phenylcinnamaldehyde, a reactant molecule with low diffusivity in zeolite Y micropores, resulting in a 5 times higher activity for the catalyst prepared by CPA compared to PTA. The combined use of these characterization techniques allow us to draw more robust conclusions on the ability to control the location of Pt nanoparticles by using either CPA or PTA as precursors in zeolite/γ-Al 2O 3 composite catalyst materials.",
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Assessment of the location of Pt nanoparticles in Pt/zeolite Y/γ‑Al2O3 composite catalysts. / Oenema, Jogchum; Hofmann, Jan Philipp; Hensen, Emiel; Zecevic, Jovana (Corresponding author); de Jong, Krijn P. (Corresponding author).

In: ChemCatChem, Vol. 12, Nr. 2, 18.01.2020, blz. 615-622.

Onderzoeksoutput: Bijdrage aan tijdschriftTijdschriftartikelAcademicpeer review

TY - JOUR

T1 - Assessment of the location of Pt nanoparticles in Pt/zeolite Y/γ‑Al2O3 composite catalysts

AU - Oenema, Jogchum

AU - Hofmann, Jan Philipp

AU - Hensen, Emiel

AU - Zecevic, Jovana

AU - de Jong, Krijn P.

PY - 2020/1/18

Y1 - 2020/1/18

N2 - The location of Pt nanoparticles was studied in Pt/zeolite Y/γ-Al 2O 3 composite catalysts prepared by H 2PtCl 6 ⋅ 6H 2O (CPA) or Pt(NH 3) 4(NO 3) 2 (PTA) as Pt precursors. The aim of this study is to validate findings from Transmission Electron Microscopy (TEM) by using characterization techniques that sample larger amounts of catalyst per measurement. Quantitative X-ray Photoelectron Spectroscopy (XPS) showed that the catalyst prepared with CPA led to a significantly higher Pt/Al atomic ratio than the catalyst prepared with PTA confirming that the 1-2 nm sized Pt nanoparticles in the former catalyst were located on the open and mesoporous γ-Al 2O 3 component, whereas they were located in the micropores of zeolite Y in the latter. By using infrared spectroscopy, a shift in the absorption band maximum of CO chemisorbed on Pt nanoparticles was observed, which can be attributed to a difference in electronic properties depending on the support of the Pt nanoparticles. Finally, model hydrogenation experiments were performed using β-phenylcinnamaldehyde, a reactant molecule with low diffusivity in zeolite Y micropores, resulting in a 5 times higher activity for the catalyst prepared by CPA compared to PTA. The combined use of these characterization techniques allow us to draw more robust conclusions on the ability to control the location of Pt nanoparticles by using either CPA or PTA as precursors in zeolite/γ-Al 2O 3 composite catalyst materials.

AB - The location of Pt nanoparticles was studied in Pt/zeolite Y/γ-Al 2O 3 composite catalysts prepared by H 2PtCl 6 ⋅ 6H 2O (CPA) or Pt(NH 3) 4(NO 3) 2 (PTA) as Pt precursors. The aim of this study is to validate findings from Transmission Electron Microscopy (TEM) by using characterization techniques that sample larger amounts of catalyst per measurement. Quantitative X-ray Photoelectron Spectroscopy (XPS) showed that the catalyst prepared with CPA led to a significantly higher Pt/Al atomic ratio than the catalyst prepared with PTA confirming that the 1-2 nm sized Pt nanoparticles in the former catalyst were located on the open and mesoporous γ-Al 2O 3 component, whereas they were located in the micropores of zeolite Y in the latter. By using infrared spectroscopy, a shift in the absorption band maximum of CO chemisorbed on Pt nanoparticles was observed, which can be attributed to a difference in electronic properties depending on the support of the Pt nanoparticles. Finally, model hydrogenation experiments were performed using β-phenylcinnamaldehyde, a reactant molecule with low diffusivity in zeolite Y micropores, resulting in a 5 times higher activity for the catalyst prepared by CPA compared to PTA. The combined use of these characterization techniques allow us to draw more robust conclusions on the ability to control the location of Pt nanoparticles by using either CPA or PTA as precursors in zeolite/γ-Al 2O 3 composite catalyst materials.

KW - Bifunctional catalysts

KW - CO infrared spectroscopy

KW - Catalysis

KW - Metal nanoparticle location

KW - Quantitative XPS

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DO - 10.1002/cctc.201901617

M3 - Article

C2 - 32064008

VL - 12

SP - 615

EP - 622

JO - ChemCatChem

JF - ChemCatChem

SN - 1867-3899

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ER -