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)|
|Number of pages||9|
|Journal||The Journal of Physical Chemistry C|
|State||Published - Sep 27 2018|
Bibliographical noteKAUST Repository Item: Exported on 2021-02-19
Acknowledgements: This work was supported by King Abdullah University of Science and Technology.