Magnetic metal phosphide nanorods as effective hydrogen-evolution electrocatalysts

Lu, A; Chen, Y; Li, H; Dowd, A; Cortie, MB; Xie, Q; Guo, H; Qi, Q; Peng, DL

Magnetic metal phosphide nanorods as effective hydrogen-evolution electrocatalysts

Lu, A Chen, Y

Li, H Dowd, A

Cortie, MB

Xie, Q Guo, H Qi, Q Peng, DL

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Publication Type:: Journal Article
Citation:: International Journal of Hydrogen Energy, 2014, 39 (33), pp. 18919 - 18928
Issue Date:: 2014-01-01

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Field	Value	Language
dc.contributor.author	Lu, A	en_US
dc.contributor.author	Chen, Y https://orcid.org/0000-0001-9749-7313	en_US
dc.contributor.author	Li, H	en_US
dc.contributor.author	Dowd, A https://orcid.org/0000-0002-0500-3599	en_US
dc.contributor.author	Cortie, MB https://orcid.org/0000-0003-3202-6398	en_US
dc.contributor.author	Xie, Q	en_US
dc.contributor.author	Guo, H	en_US
dc.contributor.author	Qi, Q	en_US
dc.contributor.author	Peng, DL	en_US
dc.date.issued	2014-01-01	en_US
dc.identifier.citation	International Journal of Hydrogen Energy, 2014, 39 (33), pp. 18919 - 18928	en_US
dc.identifier.issn	0360-3199	en_US
dc.identifier.uri	http://hdl.handle.net/10453/41216
dc.description.abstract	© 2014 Hydrogen Energy Publications, LLC. All rights reserved. Efficient and economical hydrogen evolution reaction (HER) from water splitting holds a bright prospect for clean energy. Replacement of expensive Pt-based catalysts with earth-abundant catalysts is beneficial for this field. In this study, nanoscale magnetic metal phosphides including Co2P, Co1.33Ni0.67P and Ni2P nanorods are synthesized by a facile solution method. Their HER activities and stabilities on glassy carbon and Ti electrodes are investigated. The Co2P nanorods deposited on glassy carbon electrodes are found to show higher activity and better reversibility than the Co1.33Ni0.67P and Ni2P counterparts. Nevertheless, the Co1.33Ni0.67P and Ni2P samples on Ti electrodes gain a significant activity promotion after annealing in H2/Ar atmosphere. Investigation of the Tafel curves shows that the Co2P nanorods on glassy carbon have the lowest Tafel slope while their exchange current density on Ti electrode exhibits a high value which is comparable to that of Pt electrode. Furthermore, the cyclic voltammetric tests show that the reversibility of annealed Co2P on Ti electrode is the best, which emphasizes the superiority of Co species in catalyzing HER reaction. Finally, the three magnetic metal phosphide catalysts are found to exhibit good stabilities in acidic conditions according to the galvanostatic testing results.	en_US
dc.relation.ispartof	International Journal of Hydrogen Energy	en_US
dc.relation.isbasedon	10.1016/j.ijhydene.2014.09.104	en_US
dc.subject.classification	Energy	en_US
dc.title	Magnetic metal phosphide nanorods as effective hydrogen-evolution electrocatalysts	en_US
dc.type	Journal Article
utslib.citation.volume	33	en_US
utslib.citation.volume	39	en_US
utslib.for	0306 Physical Chemistry (incl. Structural)	en_US
utslib.for	0912 Materials Engineering	en_US
utslib.for	03 Chemical Sciences	en_US
utslib.for	09 Engineering	en_US
pubs.embargo.period	Not known	en_US
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Science
pubs.organisational-group	/University of Technology Sydney/Faculty of Science/School of Mathematical and Physical Sciences
utslib.copyright.status	closed_access
pubs.issue	33	en_US
pubs.publication-status	Published	en_US
pubs.volume	39	en_US

Abstract:

© 2014 Hydrogen Energy Publications, LLC. All rights reserved. Efficient and economical hydrogen evolution reaction (HER) from water splitting holds a bright prospect for clean energy. Replacement of expensive Pt-based catalysts with earth-abundant catalysts is beneficial for this field. In this study, nanoscale magnetic metal phosphides including Co2P, Co1.33Ni0.67P and Ni2P nanorods are synthesized by a facile solution method. Their HER activities and stabilities on glassy carbon and Ti electrodes are investigated. The Co2P nanorods deposited on glassy carbon electrodes are found to show higher activity and better reversibility than the Co1.33Ni0.67P and Ni2P counterparts. Nevertheless, the Co1.33Ni0.67P and Ni2P samples on Ti electrodes gain a significant activity promotion after annealing in H2/Ar atmosphere. Investigation of the Tafel curves shows that the Co2P nanorods on glassy carbon have the lowest Tafel slope while their exchange current density on Ti electrode exhibits a high value which is comparable to that of Pt electrode. Furthermore, the cyclic voltammetric tests show that the reversibility of annealed Co2P on Ti electrode is the best, which emphasizes the superiority of Co species in catalyzing HER reaction. Finally, the three magnetic metal phosphide catalysts are found to exhibit good stabilities in acidic conditions according to the galvanostatic testing results.

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http://hdl.handle.net/10453/41216