Tang, H;
Su, Y;
Zhang, B;
Lee, AF;
Isaacs, MA;
Wilson, K;
Li, L;
... Zhang, T; + view all
(2017)
Classical strong metal–support interactions between gold nanoparticles and titanium dioxide.
Science Advances
, 3
(10)
, Article e1700231. 10.1126/sciadv.1700231.
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Abstract
Supported metal catalysts play a central role in the modern chemical industry but often exhibit poor on-stream stability. The strong metal–support interaction (SMSI) offers a route to control the structural properties of supported metals and, hence, their reactivity and stability. Conventional wisdom holds that supported Au cannot manifest a classical SMSI, which is characterized by reversible metal encapsulation by the support upon high-temperature redox treatments. We demonstrate a classical SMSI for Au/TiO2, evidenced by suppression of CO adsorption, electron transfer from TiO2to Au nanoparticles, and gold encapsulation by a TiOxoverlayer following high-temperature reduction (reversed by subsequent oxidation), akin to that observed for titania-supported platinum group metals. In the SMSI state, Au/TiO2exhibits markedly improved stability toward CO oxidation. The SMSI extends to Au supported over other reducible oxides (Fe3O4and CeO2) and other group IB metals (Cu and Ag) over titania. This discovery highlights the general nature of the classical SMSI and unlocks the development of thermochemically stable IB metal catalysts.
| Type: | Article |
|---|---|
| Title: | Classical strong metal–support interactions between gold nanoparticles and titanium dioxide |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1126/sciadv.1700231 |
| Publisher version: | http://dx.doi.org/10.1126/sciadv.1700231 |
| Language: | English |
| Additional information: | Copyright © 2017 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC) (http://creativecommons.org/licenses/by-nc/4.0/). |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS 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 Chemistry |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10053070 |
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