Hydrogen-assisted one-pot synthesis of ultrasmall TiC nanoparticles enhancing hydrogen cycling of sodium alanate

Zhang, X; Lin, Y; Zhang, L; Huang, Z; Yang, L; Li, Z; Yang, Y; Gao, M; Sun, W; Pan, H; Liu, Y

Hydrogen-assisted one-pot synthesis of ultrasmall TiC nanoparticles enhancing hydrogen cycling of sodium alanate

Zhang, X Lin, Y Zhang, L Huang, Z

Yang, L

Li, Z Yang, Y Gao, M Sun, W Pan, H Liu, Y

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Publisher:: ELSEVIER SCIENCE SA
Publication Type:: Journal Article
Citation:: Chemical Engineering Journal, 2023, 462
Issue Date:: 2023-04-15

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Field	Value	Language
dc.contributor.author	Zhang, X
dc.contributor.author	Lin, Y
dc.contributor.author	Zhang, L
dc.contributor.author	Huang, Z https://orcid.org/0000-0003-1985-0884
dc.contributor.author	Yang, L https://orcid.org/0000-0003-0123-1540
dc.contributor.author	Li, Z
dc.contributor.author	Yang, Y
dc.contributor.author	Gao, M
dc.contributor.author	Sun, W
dc.contributor.author	Pan, H
dc.contributor.author	Liu, Y
dc.date.accessioned	2024-04-10T05:55:21Z
dc.date.available	2024-04-10T05:55:21Z
dc.date.issued	2023-04-15
dc.identifier.citation	Chemical Engineering Journal, 2023, 462
dc.identifier.issn	1385-8947
dc.identifier.issn	1873-3212
dc.identifier.uri	http://hdl.handle.net/10453/177650
dc.description.abstract	Sodium alanate, NaAlH4, has great potential as a hydrogen carrier but suffers from sluggish kinetics and poor reversibility caused by high energy barriers. Transition metal-based catalysts are especially effective in reducing kinetic energy barriers for hydrogen cycling of NaAlH4. Herein, we demonstrate a facile fabrication of TiC nanoparticles with 2–4 nm in size supported on carbon (nano-TiC@C). The resultant product consists of approximately 49.2 wt% of TiC and 50.8 wt% of C, and exhibits high and stable catalytic activity for hydrogen storage process of NaAlH4. The 7 wt% nano-TiC@C-containing NaAlH4 releases 5 wt% H2 starting from 65 °C and reabsorbs all released hydrogen at 30 °C under 100 bar H2, outperforming NaAlH4 modified by commercial TiC nanoparticles (∼50 nm in size). The enhancement is related to the ultrasmall size and high reactive activity of as-synthesized TiC nanoparticles. Moreover, the weak electronegativity of C prevents the formation of Na-based by-products, which are often observed in oxide and halide-containing systems. This finding sheds light on how to design and synthesize high-performance catalytic additives for light-metal hydride-based hydrogen storage materials.
dc.language	English
dc.publisher	ELSEVIER SCIENCE SA
dc.relation.ispartof	Chemical Engineering Journal
dc.relation.isbasedon	10.1016/j.cej.2023.142199
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject	0904 Chemical Engineering, 0905 Civil Engineering, 0907 Environmental Engineering
dc.subject.classification	Chemical Engineering
dc.subject.classification	4004 Chemical engineering
dc.subject.classification	4011 Environmental engineering
dc.subject.classification	4016 Materials engineering
dc.title	Hydrogen-assisted one-pot synthesis of ultrasmall TiC nanoparticles enhancing hydrogen cycling of sodium alanate
dc.type	Journal Article
utslib.citation.volume	462
utslib.for	0904 Chemical Engineering
utslib.for	0905 Civil Engineering
utslib.for	0907 Environmental Engineering
pubs.organisational-group	University of Technology Sydney
pubs.organisational-group	University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	University of Technology Sydney/Faculty of Engineering and Information Technology/School of Civil and Environmental Engineering
pubs.organisational-group	University of Technology Sydney/Strength - CTWW - Centre for Technology in Water and Wastewater Treatment
pubs.organisational-group	University of Technology Sydney/Strength - CGT - Centre for Green Technology
utslib.copyright.status	closed_access	*
dc.date.updated	2024-04-10T05:55:19Z
pubs.publication-status	Published
pubs.volume	462

Abstract:

Sodium alanate, NaAlH4, has great potential as a hydrogen carrier but suffers from sluggish kinetics and poor reversibility caused by high energy barriers. Transition metal-based catalysts are especially effective in reducing kinetic energy barriers for hydrogen cycling of NaAlH4. Herein, we demonstrate a facile fabrication of TiC nanoparticles with 2–4 nm in size supported on carbon (nano-TiC@C). The resultant product consists of approximately 49.2 wt% of TiC and 50.8 wt% of C, and exhibits high and stable catalytic activity for hydrogen storage process of NaAlH4. The 7 wt% nano-TiC@C-containing NaAlH4 releases 5 wt% H2 starting from 65 °C and reabsorbs all released hydrogen at 30 °C under 100 bar H2, outperforming NaAlH4 modified by commercial TiC nanoparticles (∼50 nm in size). The enhancement is related to the ultrasmall size and high reactive activity of as-synthesized TiC nanoparticles. Moreover, the weak electronegativity of C prevents the formation of Na-based by-products, which are often observed in oxide and halide-containing systems. This finding sheds light on how to design and synthesize high-performance catalytic additives for light-metal hydride-based hydrogen storage materials.

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http://hdl.handle.net/10453/177650