Surface-selective direct 17O DNP NMR of CeO2 nanoparticles

Michael A. Hope; David M. Halat; Pieter C. M. M. Magusin; Subhradip Paul; Luming Peng; Clare P. Grey

doi:10.1039/C6CC10145C

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Surface-selective direct ¹⁷O DNP NMR of CeO₂ nanoparticles†

Michael A. Hope,

^a David M. Halat,^a Pieter C. M. M. Magusin,^a Subhradip Paul,^b Luming Peng^c and Clare P. Grey*^a

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* Corresponding authors

^a Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge, UK
E-mail: cpg27@cam.ac.uk

^b DNP MAS NMR Facility, Sir Peter Mansfield Magnetic Resonance Centre, University of Nottingham, Nottingham, UK

^c Key Laboratory of Mesoscopic Chemistry of MOE, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing, China

Abstract

Surface-selective direct ¹⁷O DNP has been demonstrated for the first time on CeO₂ nanoparticles, for which the first three layers can be distinguished with high selectivity. Polarisation build-up curves show that the polarisation of the (sub-)surface sites builds up faster than the bulk, accounting for the remarkable surface selectivity.

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Article information

DOI: https://doi.org/10.1039/C6CC10145C
Article type: Communication
Submitted: 21 Dec 2016
Accepted: 24 Jan 2017
First published: 24 Jan 2017
This article is Open Access

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Chem. Commun., 2017,53, 2142-2145

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Surface-selective direct ¹⁷O DNP NMR of CeO₂ nanoparticles

M. A. Hope, D. M. Halat, P. C. M. M. Magusin, S. Paul, L. Peng and C. P. Grey, Chem. Commun., 2017, 53, 2142 DOI: 10.1039/C6CC10145C

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