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 journalArticlepeer-review

1 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 languageEnglish (US)
Pages (from-to)23451-23459
Number of pages9
JournalThe Journal of Physical Chemistry C
Volume122
Issue number41
DOIs
StatePublished - Sep 27 2018

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