Bimetallic pdau catalysts within hierarchically porous architectures for aerobic oxidation of benzyl alcohol

Priyanka Verma; Matthew E. Potter; Alice E. Oakley; Panashe M. Mhembere; Robert Raja

doi:10.3390/nano11020350

Bimetallic pdau catalysts within hierarchically porous architectures for aerobic oxidation of benzyl alcohol

Priyanka Verma, Matthew E. Potter, Alice E. Oakley, Panashe M. Mhembere, Robert Raja

Department of Chemistry

University of Southampton

Research output: Contribution to journal › Article › peer-review

7 Citations (SciVal)

Abstract

Hierarchically porous (HP) zeotype materials (possessing both micropores and mesopores) offer improved diffusional access to intra-framework active sites, analogous to mesoporous materials, yet retain the high selectivity of the microporous (MP) bulk. We have recently designed crystalline hierarchically porous silicoaluminophosphates (SAPOs) with enhanced mass-transport characteristics, which can lead to significant improvement in catalytic activity and catalyst lifetime. In this study, we have prepared PdAu bimetallic nanostructures supported on HP-SAPO frameworks by an incipient impregnation of metal precursors followed by H₂ reduction at 300^◦C, for the aerobic oxidation of benzyl alcohol to benzaldehyde. PdAu NPs supported on HP framework displayed significantly enhanced catalytic activities, when compared with their MP analogues, clearly highlighting the benefits of introducing hierarchical porosity in the SAPO support matrix.

Original language	English
Article number	350
Number of pages	13
Journal	Nanomaterials
Volume	11
Issue number	2
DOIs	https://doi.org/10.3390/nano11020350
Publication status	Published - 1 Feb 2021

Bibliographical note

P.V. acknowledges The Royal Society for the Newton International Fellowship (NIF\R1\180185). P.M.P. acknowledges AdvanSix and Honeywell LLC for financial support. We thank Matthew Cooper at the National Oceanography Centre, University of Southampton for his assistance in ICP analysis. The authors acknowledge the Diamond Light Source, Didcot, UK for XAS measurements at B-18 beamline (session ID: SP19850-5). The TEM images were measured at Bioimaging Unit, University Hospital Southampton with the assistance of P.M. Goggin. We acknowledge EPSRC National Facility, HarwellXPS for XPS analysis.

Funding

Funding: This research was funded by THE ROYAL SOCIETY, grant number NIF\R1\180185. This research was funded by THE ROYAL SOCIETY, grant number NIF\R1\180185. P.V. acknowledges The Royal Society for the Newton International Fellowship (NIF\R1\180185). P.M.P. acknowledges AdvanSix and Honeywell LLC for financial support. We thank Matthew Cooper at the National Oceanography Centre, University of Southampton for his assistance in ICP analysis. The authors acknowledge the Diamond Light Source, Didcot, UK for XAS measurements at B-18 beamline (session ID: SP19850-5). The TEM images were measured at Bioimaging Unit, University Hospital Southampton with the assistance of P.M. Goggin. We acknowledge EPSRC National Facility, HarwellXPS for XPS analysis.

Funders	Funder number
UOP LLC
National Oceanography Centre, University of Southampton	SP19850-5
Engineering and Physical Sciences Research Council
Royal Society	NIF\R1\180185

Keywords

Alcohol oxidation
Bimetallic nanoparticles
Hierarchically porous materials
Noble metal nanoparticles

ASJC Scopus subject areas

General Chemical Engineering
General Materials Science

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10.3390/nano11020350Licence: CC BY

Cite this

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abstract = "Hierarchically porous (HP) zeotype materials (possessing both micropores and mesopores) offer improved diffusional access to intra-framework active sites, analogous to mesoporous materials, yet retain the high selectivity of the microporous (MP) bulk. We have recently designed crystalline hierarchically porous silicoaluminophosphates (SAPOs) with enhanced mass-transport characteristics, which can lead to significant improvement in catalytic activity and catalyst lifetime. In this study, we have prepared PdAu bimetallic nanostructures supported on HP-SAPO frameworks by an incipient impregnation of metal precursors followed by H2 reduction at 300◦C, for the aerobic oxidation of benzyl alcohol to benzaldehyde. PdAu NPs supported on HP framework displayed significantly enhanced catalytic activities, when compared with their MP analogues, clearly highlighting the benefits of introducing hierarchical porosity in the SAPO support matrix.",

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note = "P.V. acknowledges The Royal Society for the Newton International Fellowship (NIF\R1\180185). P.M.P. acknowledges AdvanSix and Honeywell LLC for financial support. We thank Matthew Cooper at the National Oceanography Centre, University of Southampton for his assistance in ICP analysis. The authors acknowledge the Diamond Light Source, Didcot, UK for XAS measurements at B-18 beamline (session ID: SP19850-5). The TEM images were measured at Bioimaging Unit, University Hospital Southampton with the assistance of P.M. Goggin. We acknowledge EPSRC National Facility, HarwellXPS for XPS analysis.",

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AU - Raja, Robert

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N2 - Hierarchically porous (HP) zeotype materials (possessing both micropores and mesopores) offer improved diffusional access to intra-framework active sites, analogous to mesoporous materials, yet retain the high selectivity of the microporous (MP) bulk. We have recently designed crystalline hierarchically porous silicoaluminophosphates (SAPOs) with enhanced mass-transport characteristics, which can lead to significant improvement in catalytic activity and catalyst lifetime. In this study, we have prepared PdAu bimetallic nanostructures supported on HP-SAPO frameworks by an incipient impregnation of metal precursors followed by H2 reduction at 300◦C, for the aerobic oxidation of benzyl alcohol to benzaldehyde. PdAu NPs supported on HP framework displayed significantly enhanced catalytic activities, when compared with their MP analogues, clearly highlighting the benefits of introducing hierarchical porosity in the SAPO support matrix.

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Bimetallic pdau catalysts within hierarchically porous architectures for aerobic oxidation of benzyl alcohol

Abstract

Bibliographical note

Funding

Keywords

ASJC Scopus subject areas

Access to Document

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