Precise Control of Pt Particle Size for Surface Structure–Reaction Activity Relationship

Reem A. Al-Shareef; Moussab Harb; Youssef Saih; Samy Ould-Chikh; Dalaver H. Anjum; Jean-Pierre Candy; Jean-Marie Basset

doi:10.1021/acs.jpcc.8b06346

Precise Control of Pt Particle Size for Surface Structure–Reaction Activity Relationship

Reem A. Al-Shareef, Moussab Harb, Youssef Saih, Samy Ould-Chikh, Dalaver H. Anjum, Jean-Pierre Candy, Jean-Marie Basset

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

5 Scopus citations

Abstract

The use of surface organometallic chemistry on metal (SOMC/M) allows the controlled and stepwise variation of the platinum particle size in Pt/SiO catalysts. This SOMC/M method is possible thanks to the better affinity of most organometallic compounds with the surface of zerovalent metal particles covered with hydrogen than their support. In this paper, Pt(acac) was used as the organometallic precursor, silica as a support, and then hydrogen to reduce the adsorbed organometallic layer on top of the starting Pt nanoparticle. We partially succeeded in adding one Pt layer with a stepwise particle size increase of around 0.6 nm when going from the first (1G) to the second (2G) refilling run, as obtained from TEM and H chemisorption analysis and then confirmed by DFT calculations. The metal loading could be kept at a very low level (

Original language	English (US)
Pages (from-to)	23451-23459
Number of pages	9
Journal	The Journal of Physical Chemistry C
Volume	122
Issue number	41
DOIs	https://doi.org/10.1021/acs.jpcc.8b06346
State	Published - Sep 27 2018

Bibliographical note

KAUST Repository Item: Exported on 2021-02-19
Acknowledgements: This work was supported by King Abdullah University of Science and Technology.

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https://repository.kaust.edu.sa/bitstream/10754/629971/1/M.Harb_JPCC_122_23451_18.pdf

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title = "Precise Control of Pt Particle Size for Surface Structure–Reaction Activity Relationship",

abstract = "The use of surface organometallic chemistry on metal (SOMC/M) allows the controlled and stepwise variation of the platinum particle size in Pt/SiO catalysts. This SOMC/M method is possible thanks to the better affinity of most organometallic compounds with the surface of zerovalent metal particles covered with hydrogen than their support. In this paper, Pt(acac) was used as the organometallic precursor, silica as a support, and then hydrogen to reduce the adsorbed organometallic layer on top of the starting Pt nanoparticle. We partially succeeded in adding one Pt layer with a stepwise particle size increase of around 0.6 nm when going from the first (1G) to the second (2G) refilling run, as obtained from TEM and H chemisorption analysis and then confirmed by DFT calculations. The metal loading could be kept at a very low level (",

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note = "KAUST Repository Item: Exported on 2021-02-19 Acknowledgements: This work was supported by King Abdullah University of Science and Technology.",

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doi = "10.1021/acs.jpcc.8b06346",

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AU - Al-Shareef, Reem A.

AU - Harb, Moussab

AU - Saih, Youssef

AU - Ould-Chikh, Samy

AU - Anjum, Dalaver H.

AU - Candy, Jean-Pierre

AU - Basset, Jean-Marie

N1 - KAUST Repository Item: Exported on 2021-02-19 Acknowledgements: This work was supported by King Abdullah University of Science and Technology.

PY - 2018/9/27

Y1 - 2018/9/27

N2 - The use of surface organometallic chemistry on metal (SOMC/M) allows the controlled and stepwise variation of the platinum particle size in Pt/SiO catalysts. This SOMC/M method is possible thanks to the better affinity of most organometallic compounds with the surface of zerovalent metal particles covered with hydrogen than their support. In this paper, Pt(acac) was used as the organometallic precursor, silica as a support, and then hydrogen to reduce the adsorbed organometallic layer on top of the starting Pt nanoparticle. We partially succeeded in adding one Pt layer with a stepwise particle size increase of around 0.6 nm when going from the first (1G) to the second (2G) refilling run, as obtained from TEM and H chemisorption analysis and then confirmed by DFT calculations. The metal loading could be kept at a very low level (

AB - The use of surface organometallic chemistry on metal (SOMC/M) allows the controlled and stepwise variation of the platinum particle size in Pt/SiO catalysts. This SOMC/M method is possible thanks to the better affinity of most organometallic compounds with the surface of zerovalent metal particles covered with hydrogen than their support. In this paper, Pt(acac) was used as the organometallic precursor, silica as a support, and then hydrogen to reduce the adsorbed organometallic layer on top of the starting Pt nanoparticle. We partially succeeded in adding one Pt layer with a stepwise particle size increase of around 0.6 nm when going from the first (1G) to the second (2G) refilling run, as obtained from TEM and H chemisorption analysis and then confirmed by DFT calculations. The metal loading could be kept at a very low level (

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SP - 23451

EP - 23459

JO - The Journal of Physical Chemistry C

JF - The Journal of Physical Chemistry C

IS - 41

ER -

Precise Control of Pt Particle Size for Surface Structure–Reaction Activity Relationship

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