Self-Printing on Graphitic Nanosheets with Metal Borohydride Nanodots for Hydrogen Storage

Although the synthesis of borohydride nanostructures is sufficiently established for advancement of hydrogen storage, obtaining ultrasmall (sub-10 nm) metal borohydride nanocrystals with excellent dispersibility is extremely challenging because of their high surface energy, exceedingly strong reduci...

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Main Authors:	Li, Yongtao, Ding, Xiaoli, Zhang, Qingan
Format:	Online
Language:	English
Published:	Nature Publishing Group 2016
Online Access:	https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4971464/

id	pubmed-4971464
recordtype	oai_dc
spelling	pubmed-49714642016-08-11 Self-Printing on Graphitic Nanosheets with Metal Borohydride Nanodots for Hydrogen Storage Li, Yongtao Ding, Xiaoli Zhang, Qingan Article Although the synthesis of borohydride nanostructures is sufficiently established for advancement of hydrogen storage, obtaining ultrasmall (sub-10 nm) metal borohydride nanocrystals with excellent dispersibility is extremely challenging because of their high surface energy, exceedingly strong reducibility/hydrophilicity and complicated composition. Here, we demonstrate a mechanical-force-driven self-printing process that enables monodispersed (~6 nm) NaBH4 nanodots to uniformly anchor onto freshly-exfoliated graphitic nanosheets (GNs). Both mechanical-forces and borohydride interaction with GNs stimulate NaBH4 clusters intercalation/absorption into the graphite interlayers acting as a ‘pen’ for writing, which is accomplished by exfoliating GNs with the ‘printed’ borohydrides. These nano-NaBH4@GNs exhibit favorable thermodynamics (decrease in ∆H of ~45%), rapid kinetics (a greater than six-fold increase) and stable de-/re-hydrogenation that retains a high capacity (up to ~5 wt% for NaBH4) compared with those of micro-NaBH4. Our results are helpful in the scalable fabrication of zero-dimensional complex hydrides on two-dimensional supports with enhanced hydrogen storage for potential applications. Nature Publishing Group 2016-08-03 /pmc/articles/PMC4971464/ /pubmed/27484735 http://dx.doi.org/10.1038/srep31144 Text en Copyright © 2016, The Author(s) http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/
repository_type	Open Access Journal
institution_category	Foreign Institution
institution	US National Center for Biotechnology Information
building	NCBI PubMed
collection	Online Access
language	English
format	Online
author	Li, Yongtao Ding, Xiaoli Zhang, Qingan
spellingShingle	Li, Yongtao Ding, Xiaoli Zhang, Qingan Self-Printing on Graphitic Nanosheets with Metal Borohydride Nanodots for Hydrogen Storage
author_facet	Li, Yongtao Ding, Xiaoli Zhang, Qingan
author_sort	Li, Yongtao
title	Self-Printing on Graphitic Nanosheets with Metal Borohydride Nanodots for Hydrogen Storage
title_short	Self-Printing on Graphitic Nanosheets with Metal Borohydride Nanodots for Hydrogen Storage
title_full	Self-Printing on Graphitic Nanosheets with Metal Borohydride Nanodots for Hydrogen Storage
title_fullStr	Self-Printing on Graphitic Nanosheets with Metal Borohydride Nanodots for Hydrogen Storage
title_full_unstemmed	Self-Printing on Graphitic Nanosheets with Metal Borohydride Nanodots for Hydrogen Storage
title_sort	self-printing on graphitic nanosheets with metal borohydride nanodots for hydrogen storage
description	Although the synthesis of borohydride nanostructures is sufficiently established for advancement of hydrogen storage, obtaining ultrasmall (sub-10 nm) metal borohydride nanocrystals with excellent dispersibility is extremely challenging because of their high surface energy, exceedingly strong reducibility/hydrophilicity and complicated composition. Here, we demonstrate a mechanical-force-driven self-printing process that enables monodispersed (~6 nm) NaBH4 nanodots to uniformly anchor onto freshly-exfoliated graphitic nanosheets (GNs). Both mechanical-forces and borohydride interaction with GNs stimulate NaBH4 clusters intercalation/absorption into the graphite interlayers acting as a ‘pen’ for writing, which is accomplished by exfoliating GNs with the ‘printed’ borohydrides. These nano-NaBH4@GNs exhibit favorable thermodynamics (decrease in ∆H of ~45%), rapid kinetics (a greater than six-fold increase) and stable de-/re-hydrogenation that retains a high capacity (up to ~5 wt% for NaBH4) compared with those of micro-NaBH4. Our results are helpful in the scalable fabrication of zero-dimensional complex hydrides on two-dimensional supports with enhanced hydrogen storage for potential applications.
publisher	Nature Publishing Group
publishDate	2016
url	https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4971464/
_version_	1613620293443518464

Self-Printing on Graphitic Nanosheets with Metal Borohydride Nanodots for Hydrogen Storage

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