Low temperature catalytic reactivity of nanodiamond in molecular hydrogen

Ahmed, Ashek -I-, Mandal, Soumen ORCID: https://orcid.org/0000-0001-8912-1439, Gines, Laia ORCID: https://orcid.org/0000-0001-9980-054X, Williams, Oliver A. ORCID: https://orcid.org/0000-0002-7210-3004 and Cheng, Chia-Liang 2016. Low temperature catalytic reactivity of nanodiamond in molecular hydrogen. Carbon 110 , pp. 438-442. 10.1016/j.carbon.2016.09.019

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Abstract

In this paper, the reaction dynamics of hydrogen termination of nanodiamond annealed at low temperature (500 °C) in molecular hydrogen atmosphere is reported. In-situ residual gas analysis of nanodiamond particles (4–5 nm) during annealing/hydrogenation indicates C3-radical desorption which incites a free radical reaction through the reduction of molecular hydrogen to atomic hydrogen. Consequently, as released atomic hydrogen facilitates Csingle bondH adsorption on the surface of nanodiamond which was confirmed using infrared spectroscopy. This explains how nanodiamond particles can play a key role in hydrogen (H2) dissociation and be terminated by the hydrogen (H) at relatively low temperature.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Physics and Astronomy
Subjects:	Q Science > QC Physics
Publisher:	Elsevier
ISSN:	0008-6223
Date of Acceptance:	7 September 2016
Last Modified:	01 Nov 2022 11:26
URI:	https://orca.cardiff.ac.uk/id/eprint/94975

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