Electrocatalytic Ammonia Oxidation to Nitrite and Nitrate with NiOOH-Ni

Liu, H; Yang, CJ; Dong, CL; Wang, J; Zhang, X; Lyalin, A; Taketsugu, T; Chen, Z; Guan, D; Xu, X; Shao, Z; Huang, Z

Electrocatalytic Ammonia Oxidation to Nitrite and Nitrate with NiOOH-Ni

Liu, H Yang, CJ Dong, CL Wang, J Zhang, X Lyalin, A Taketsugu, T Chen, Z Guan, D Xu, X Shao, Z Huang, Z

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Publisher:: WILEY-V C H VERLAG GMBH
Publication Type:: Journal Article
Citation:: Advanced Energy Materials, 2024
Issue Date:: 2024-01-01

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Field	Value	Language
dc.contributor.author	Liu, H
dc.contributor.author	Yang, CJ
dc.contributor.author	Dong, CL
dc.contributor.author	Wang, J
dc.contributor.author	Zhang, X
dc.contributor.author	Lyalin, A
dc.contributor.author	Taketsugu, T
dc.contributor.author	Chen, Z
dc.contributor.author	Guan, D
dc.contributor.author	Xu, X
dc.contributor.author	Shao, Z
dc.contributor.author	Huang, Z https://orcid.org/0000-0003-1985-0884
dc.date.accessioned	2024-11-11T06:04:08Z
dc.date.available	2024-11-11T06:04:08Z
dc.date.issued	2024-01-01
dc.identifier.citation	Advanced Energy Materials, 2024
dc.identifier.issn	1614-6832
dc.identifier.issn	1614-6840
dc.identifier.uri	http://hdl.handle.net/10453/181838
dc.description.abstract	Ammonia electrooxidation in aqueous solutions can be a highly energy-efficient process in producing nitrate and nitrite while generating hydrogen under ambient conditions. However, the kinetics of this reaction are slow and the role of catalyst in facilitating ammonia electrooxidation is not well understood. In this study, a high-performance NiOOH-Ni catalyst is introduced for converting ammonia into nitrite with Faraday efficiency of up to 90.4% and nitrate production rate of 1 mg h−1 cm−2. By employing Operando techniques, the role of NiOOH catalyst is elucidated in the dynamic electrooxidation of ammonia. Density functional theory (DFT) calculations support experimental observations and reveal the mechanism of the electrochemical oxidation of ammonia to nitrite and nitrate. Overall, this research contributes to the development of a cost-effective and highly efficient catalyst for large-scale ammonia electrolysis, while shedding light on the underlying mechanism of the NiOOH catalyst in ammonia electrooxidation.
dc.language	English
dc.publisher	WILEY-V C H VERLAG GMBH
dc.relation	http://purl.org/au-research/grants/arc/FT190100658
dc.relation	http://purl.org/au-research/grants/arc/DP220103458
dc.relation.ispartof	Advanced Energy Materials
dc.relation.isbasedon	10.1002/aenm.202401675
dc.rights	info:eu-repo/semantics/openAccess
dc.subject	0303 Macromolecular and Materials Chemistry, 0912 Materials Engineering, 0915 Interdisciplinary Engineering
dc.subject.classification	3403 Macromolecular and materials chemistry
dc.subject.classification	4016 Materials engineering
dc.title	Electrocatalytic Ammonia Oxidation to Nitrite and Nitrate with NiOOH-Ni
dc.type	Journal Article
utslib.for	0303 Macromolecular and Materials Chemistry
utslib.for	0912 Materials Engineering
utslib.for	0915 Interdisciplinary 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/UTS Groups
pubs.organisational-group	University of Technology Sydney/UTS Groups/Centre for Technology in Water and Wastewater (CTWW)
pubs.organisational-group	University of Technology Sydney/UTS Groups/Centre for Clean Energy Technology (CCET)
pubs.organisational-group	University of Technology Sydney/UTS Groups/Centre for Green Technology (CGT)
pubs.organisational-group	University of Technology Sydney/UTS Groups/Centre for Clean Energy Technology (CCET)/Associate Member
utslib.copyright.status	open_access	*
dc.rights.license	This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License (CC BY-NC 4.0). To view a copy of this license, visit https://creativecommons.org/licenses/by-nc/4.0/
dc.date.updated	2024-11-11T06:04:06Z
pubs.publication-status	Published

Abstract:

Ammonia electrooxidation in aqueous solutions can be a highly energy-efficient process in producing nitrate and nitrite while generating hydrogen under ambient conditions. However, the kinetics of this reaction are slow and the role of catalyst in facilitating ammonia electrooxidation is not well understood. In this study, a high-performance NiOOH-Ni catalyst is introduced for converting ammonia into nitrite with Faraday efficiency of up to 90.4% and nitrate production rate of 1 mg h−1 cm−2. By employing Operando techniques, the role of NiOOH catalyst is elucidated in the dynamic electrooxidation of ammonia. Density functional theory (DFT) calculations support experimental observations and reveal the mechanism of the electrochemical oxidation of ammonia to nitrite and nitrate. Overall, this research contributes to the development of a cost-effective and highly efficient catalyst for large-scale ammonia electrolysis, while shedding light on the underlying mechanism of the NiOOH catalyst in ammonia electrooxidation.

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http://hdl.handle.net/10453/181838