Issue 37, 2022

Surface differences of oxide nanocrystals determined by geometry and exogenously coordinated water molecules

Abstract

Determining the different surfaces of oxide nanocrystals is key in developing structure–property relations. In many cases, only surface geometry is considered while ignoring the influence of surroundings, such as ubiquitous water on the surface. Here we apply 17O solid-state NMR spectroscopy to explore the facet differences of morphology-controlled ceria nanocrystals considering both geometry and water adsorption. Tri-coordinated oxygen ions at the 1st layer of ceria (111), (110), and (100) facets exhibit distinct 17O NMR shifts at dry surfaces while these 17O NMR parameters vary in the presence of water, indicating its non-negligible effects on the oxide surface. Thus, the interaction between water and oxide surfaces and its impact on the chemical environment should be considered in future studies, and solid-state NMR spectroscopy is a sensitive approach for obtaining such information. The work provides new insights into elucidating the surface chemistry of oxide nanomaterials.

Graphical abstract: Surface differences of oxide nanocrystals determined by geometry and exogenously coordinated water molecules

Supplementary files

Article information

Article type
Edge Article
Submitted
12 Jul 2022
Accepted
18 Aug 2022
First published
14 Sep 2022
This article is Open Access

All publication charges for this article have been paid for by the Royal Society of Chemistry
Creative Commons BY-NC license

Chem. Sci., 2022,13, 11083-11090

Surface differences of oxide nanocrystals determined by geometry and exogenously coordinated water molecules

J. Chen, X. Wu, M. A. Hope, Z. Lin, L. Zhu, Y. Wen, Y. Zhang, T. Qin, J. Wang, T. Liu, X. Xia, D. Wu, X. Gong, W. Tang, W. Ding, X. Liu, L. Chen, C. P. Grey and L. Peng, Chem. Sci., 2022, 13, 11083 DOI: 10.1039/D2SC03885D

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