Polyaniline engineering defect-induced nitrogen doped carbon-supported Co<inf>3</inf>O<inf>4</inf> hybrid composite as a high-efficiency electrocatalyst for oxygen evolution reaction

Chen, X; Chen, Y; Luo, X; Guo, H; Wang, N; Su, D; Zhang, C; Liu, T; Wang, G; Cui, L

Polyaniline engineering defect-induced nitrogen doped carbon-supported Co<inf>3</inf>O<inf>4</inf> hybrid composite as a high-efficiency electrocatalyst for oxygen evolution reaction

Chen, X Chen, Y Luo, X Guo, H Wang, N Su, D

Zhang, C Liu, T Wang, G

Cui, L

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Publisher:: ELSEVIER
Publication Type:: Journal Article
Citation:: Applied Surface Science, 2020, 526
Issue Date:: 2020-10-01

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Field	Value	Language
dc.contributor.author	Chen, X
dc.contributor.author	Chen, Y
dc.contributor.author	Luo, X
dc.contributor.author	Guo, H
dc.contributor.author	Wang, N
dc.contributor.author	Su, D https://orcid.org/0000-0002-3972-8205
dc.contributor.author	Zhang, C
dc.contributor.author	Liu, T
dc.contributor.author	Wang, G https://orcid.org/0000-0003-4295-8578
dc.contributor.author	Cui, L
dc.date.accessioned	2021-01-12T05:37:37Z
dc.date.available	2021-01-12T05:37:37Z
dc.date.issued	2020-10-01
dc.identifier.citation	Applied Surface Science, 2020, 526
dc.identifier.issn	0169-4332
dc.identifier.issn	1873-5584
dc.identifier.uri	http://hdl.handle.net/10453/145343
dc.description.abstract	© 2020 Elsevier B.V. The development of earth-abundance electrocatalyst with high performance for oxygen evolution reaction (OER) is of paramount importance in sustainable water splitting. Herein, the novel defect-induced nitrogen-doped carbon-supported Co3O4 nanoparticles is successfully fabricated as OER electrocatalyst (denoted as Co3O4/CN HNPs) through a wetness-impregnation treatment of Co/polyaniline (PANI) followed by a thermal annealing. This advanced architecture of Co3O4/CN HNPs can not only improve its conductivity and electrocatalytically active sites but also generate a large number of oxygen-vacancy defects and crystal defects, which effectively exert the preponderance in facilitating interfacial electronic transfer and optimizing the adsorption energy for intermediates, thus imparting the extraordinary activities in catalyzing OER. In addition, there are evidences demonstrating the formation of C-N coordination bonds through the strong interaction of the interconnected interface and the generation of pyridinic-N species after the annealing treatment, which enables the structural stability to get further strengthened and accelerates oxygen releasing for reduction of OER overpotential, respectively. Benefiting from the above desirable properties, the Co3O4/CN HNPs affords a lower overpotential of 290 mV at a current density of 10 mA cm−2 as compared to those of pure Co3O4 and PANI, outperforming commercial IrO2 and the representative Co3O4-based OER electrocatalysts as recently reported. Moreover, the Co3O4/CN HNPs also exhibits long durability with negligible activity degeneration at a current density of 10 mA cm−2 for 20 h. ̵.
dc.language	English
dc.publisher	ELSEVIER
dc.relation	http://purl.org/au-research/grants/arc/DP160104340
dc.relation.ispartof	Applied Surface Science
dc.relation.isbasedon	10.1016/j.apsusc.2020.146626
dc.rights	info:eu-repo/semantics/restrictedAccess
dc.subject.classification	Applied Physics
dc.title	Polyaniline engineering defect-induced nitrogen doped carbon-supported Co<inf>3</inf>O<inf>4</inf> hybrid composite as a high-efficiency electrocatalyst for oxygen evolution reaction
dc.type	Journal Article
utslib.citation.volume	526
pubs.organisational-group	/University of Technology Sydney/Faculty of Science
pubs.organisational-group	/University of Technology Sydney/Strength - CCET - Centre for Clean Energy Technology
pubs.organisational-group	/University of Technology Sydney/Faculty of Science/School of Mathematical and Physical Sciences
pubs.organisational-group	/University of Technology Sydney
utslib.copyright.status	closed_access	*
pubs.consider-herdc	false
dc.date.updated	2021-01-12T05:37:31Z
pubs.publication-status	Published
pubs.volume	526

Abstract:

© 2020 Elsevier B.V. The development of earth-abundance electrocatalyst with high performance for oxygen evolution reaction (OER) is of paramount importance in sustainable water splitting. Herein, the novel defect-induced nitrogen-doped carbon-supported Co3O4 nanoparticles is successfully fabricated as OER electrocatalyst (denoted as Co3O4/CN HNPs) through a wetness-impregnation treatment of Co/polyaniline (PANI) followed by a thermal annealing. This advanced architecture of Co3O4/CN HNPs can not only improve its conductivity and electrocatalytically active sites but also generate a large number of oxygen-vacancy defects and crystal defects, which effectively exert the preponderance in facilitating interfacial electronic transfer and optimizing the adsorption energy for intermediates, thus imparting the extraordinary activities in catalyzing OER. In addition, there are evidences demonstrating the formation of C-N coordination bonds through the strong interaction of the interconnected interface and the generation of pyridinic-N species after the annealing treatment, which enables the structural stability to get further strengthened and accelerates oxygen releasing for reduction of OER overpotential, respectively. Benefiting from the above desirable properties, the Co3O4/CN HNPs affords a lower overpotential of 290 mV at a current density of 10 mA cm−2 as compared to those of pure Co3O4 and PANI, outperforming commercial IrO2 and the representative Co3O4-based OER electrocatalysts as recently reported. Moreover, the Co3O4/CN HNPs also exhibits long durability with negligible activity degeneration at a current density of 10 mA cm−2 for 20 h. ̵.

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http://hdl.handle.net/10453/145343