Bifunctional iron nickel phosphide nanocatalysts supported on porous carbon for highly efficient overall water splitting

Huo, J; Chen, Y; Liu, Y; Guo, J; Lu, L; Li, W; Wang, Y; Liu, H

Bifunctional iron nickel phosphide nanocatalysts supported on porous carbon for highly efficient overall water splitting

Huo, J Chen, Y Liu, Y Guo, J Lu, L Li, W Wang, Y Liu, H

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Publication Type:: Journal Article
Citation:: Sustainable Materials and Technologies, 2019, 22
Issue Date:: 2019-12-01

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Field	Value	Language
dc.contributor.author	Huo, J	en_US
dc.contributor.author	Chen, Y	en_US
dc.contributor.author	Liu, Y	en_US
dc.contributor.author	Guo, J	en_US
dc.contributor.author	Lu, L	en_US
dc.contributor.author	Li, W	en_US
dc.contributor.author	Wang, Y	en_US
dc.contributor.author	Liu, H https://orcid.org/0000-0003-0266-9472	en_US
dc.date.issued	2019-12-01	en_US
dc.identifier.citation	Sustainable Materials and Technologies, 2019, 22	en_US
dc.identifier.uri	http://hdl.handle.net/10453/135396
dc.description.abstract	© 2019 The development of low-cost and earth-abundant materials for efficient oxygen and hydrogen evolution is critical for water splitting as a feasible energy conversion system. Metallic phosphides as promising bifunctional catalysts for water splitting tend to aggregate during the preparation and application. Thus, constructing metal phosphide-based composites with well-exposed active sites and stable structure is essential. Here, bi-metallic iron nickel phosphide nanoparticles (NPs) loaded on three-dimensional (3D) porous carbon (denoted as FexNi2-xP (0 < x < 2)) is synthesized through a facile co-deposition method followed by in situ phosphidation. The interconnected porous carbon with large specific area, abundant microporous and oxygen-containing functional groups contribute to the generation of ultra-small Fe–Ni–P NPs by confining growth of Fe–Ni layered double hydroxide (Fe–Ni–LDH) precursor. The ultra-small FexNi2-xP NPs loaded on 3D interconnected porous carbon with large active surface area and high conductivity can offer abundant catalytic active sites, facilitate mass transport and optimize electronic configuration, thereby promoting the reaction kinetics and accelerating catalytic performance. By tailoring the Ni/Fe ratios, the optimal bimetallic phosphide exhibits a small overpotential of 210 mV at current density of 10 mA cm−2 for oxygen evolution reaction. When applying for water splitting as cathode and anode materials in an alkaline electrolyzer, the potential of 1.63 V is required to reach 10 mA cm−2. The catalyst obtained from this strategy is a promising bi-functional catalyst for water splitting.	en_US
dc.relation	http://purl.org/au-research/grants/arc/DP180102297
dc.relation	http://purl.org/au-research/grants/arc/FT180100705
dc.relation.ispartof	Sustainable Materials and Technologies	en_US
dc.relation.isbasedon	10.1016/j.susmat.2019.e00117	en_US
dc.title	Bifunctional iron nickel phosphide nanocatalysts supported on porous carbon for highly efficient overall water splitting	en_US
dc.type	Journal Article
utslib.citation.volume	22	en_US
utslib.for	0301 Analytical Chemistry	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
pubs.organisational-group	/University of Technology Sydney/Strength - CCET - Centre for Clean Energy Technology
utslib.copyright.status	closed_access
pubs.publication-status	Published	en_US
pubs.volume	22	en_US

Abstract:

© 2019 The development of low-cost and earth-abundant materials for efficient oxygen and hydrogen evolution is critical for water splitting as a feasible energy conversion system. Metallic phosphides as promising bifunctional catalysts for water splitting tend to aggregate during the preparation and application. Thus, constructing metal phosphide-based composites with well-exposed active sites and stable structure is essential. Here, bi-metallic iron nickel phosphide nanoparticles (NPs) loaded on three-dimensional (3D) porous carbon (denoted as FexNi2-xP (0 < x < 2)) is synthesized through a facile co-deposition method followed by in situ phosphidation. The interconnected porous carbon with large specific area, abundant microporous and oxygen-containing functional groups contribute to the generation of ultra-small Fe–Ni–P NPs by confining growth of Fe–Ni layered double hydroxide (Fe–Ni–LDH) precursor. The ultra-small FexNi2-xP NPs loaded on 3D interconnected porous carbon with large active surface area and high conductivity can offer abundant catalytic active sites, facilitate mass transport and optimize electronic configuration, thereby promoting the reaction kinetics and accelerating catalytic performance. By tailoring the Ni/Fe ratios, the optimal bimetallic phosphide exhibits a small overpotential of 210 mV at current density of 10 mA cm−2 for oxygen evolution reaction. When applying for water splitting as cathode and anode materials in an alkaline electrolyzer, the potential of 1.63 V is required to reach 10 mA cm−2. The catalyst obtained from this strategy is a promising bi-functional catalyst for water splitting.

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http://hdl.handle.net/10453/135396