Loi, Federico;
Pozzo, Monica;
Sbuelz, Luca;
Bignardi, Luca;
Lacovig, Paolo;
Tosi, Ezequiel;
Lizzit, Silvano;
... Baraldi, Alessandro; + view all
(2022)
Oxidation at the sub-nanoscale: oxygen adsorption on graphene-supported size-selected Ag clusters.
Journal of Materials Chemistry A
, 10
(27)
pp. 14594-14603.
10.1039/d2ta02539f.
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Abstract
The evolution of the aggregation of condensed matter from single atoms to three-dimensional structures represents an important topic in nanoscience, since it contains essential information to achieve tailor-made growth of nanostructured materials. Such an issue is particularly important in the case of the formation of nano-oxides, which have strong potentialities in heterogeneous catalysis reactions. Herein, we show that a low-nuclearity graphene supported Ag cluster (formed by 11 atoms) shows a local AgO4 configuration, spatial charge distribution and two oxidation states that are similar to those of bulk AgO. This result indicates that bulk oxide conformations can start to develop already for extremely small atomic aggregates (<1 nm), differently from metallic clusters. This local conformation shows the lowest oxygen vacancy formation energy, which affords high efficiency in the ethylene epoxidation reaction with Ag and strongly supports the possibility of incorporating sub-nanometric clusters in important catalytic reactions.
| Type: | Article |
|---|---|
| Title: | Oxidation at the sub-nanoscale: oxygen adsorption on graphene-supported size-selected Ag clusters |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1039/d2ta02539f |
| Publisher version: | https://doi.org/10.1039/D2TA02539F |
| Language: | English |
| Additional information: | This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. |
| UCL classification: | UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Earth Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS UCL |
| URI: | https://discovery-pp.ucl.ac.uk/id/eprint/10155029 |
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