Xu, Kai;
Liu, Jin C;
Wang, Wei-Wei;
Zhou, Lu-Lu;
Ma, Chao;
Guan, Xuze;
Wang, Feng R;
... Yan, Chun-Hua; + view all
(2024)
Catalytic properties of trivalent rare-earth oxides with intrinsic surface oxygen vacancy.
Nature Communications
, 15
, Article 5751. 10.1038/s41467-024-49981-9.
(In press).
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Abstract
Oxygen vacancy (Ov) is an anionic defect widely existed in metal oxide lattice, as exemplified by CeO2, TiO2, and ZnO. As Ov can modify the band structure of solid, it improves the physicochemical properties such as the semiconducting performance and catalytic behaviours. We report here a new type of Ov as an intrinsic part of a perfect crystalline surface. Such non-defect Ov stems from the irregular hexagonal sawtooth-shaped structure in the (111) plane of trivalent rare earth oxides (RE2O3). The materials with such intrinsic Ov structure exhibit excellent performance in ammonia decomposition reaction with surface Ru active sites. Extremely high H2 formation rate has been achieved at ~1 wt% of Ru loading over Sm2O3, Y2O3 and Gd2O3 surface, which is 1.5–20 times higher than reported values in the literature. The discovery of intrinsic Ov suggests great potentials of applying RE oxides in heterogeneous catalysis and surface chemistry.
| Type: | Article |
|---|---|
| Title: | Catalytic properties of trivalent rare-earth oxides with intrinsic surface oxygen vacancy |
| Location: | England |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1038/s41467-024-49981-9 |
| Publisher version: | https://doi.org/10.1038/s41467-024-49981-9 |
| Language: | English |
| Additional information: | © The Author(s), 2024. This is an Open Access article distributed under the terms of the Creative Commons Attribution Licence (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. https://creativecommons.org/licenses/by/4.0/ |
| Keywords: | Catalytic mechanisms, Computational chemistry, Heterogeneous catalysis |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Chemical Engineering |
| URI: | https://discovery-pp.ucl.ac.uk/id/eprint/10194985 |
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