中文版 | English
Title

Amorphous iron-doped nickel boride with facilitated structural reconstruction and dual active sites for efficient urea electrooxidation

Author
Publication Years
2023-06-01
DOI
Source Title
ISSN
1385-8947
Volume465
Abstract
Designing transition metal-based catalysts for efficient urea oxidation reaction (UOR) is important for realizing energy-saving hydrogen production via urea-rich (waste)water electrolysis. Herein, we have developed an iron-doped amorphous nickel boride electrocatalyst (aFe-NiB) for UOR. Compared with the undoped and crystalline counterparts, aFe-NiB exhibits a higher activity and the benchmark current density of 10 mA cm can be attained at 1.298 V vs. reversible hydrogen electrode (RHE). Coupled with an efficient hydrogen evolution catalyst, the aFe-NiB-assisted urine electrolyzer can attain a 46 times higher H production rate than the water electrolyzer at 1.50 V. Further study reveals a crystallinity-dependent structure self-reconstruction process during UOR. aFe-NiB attains complete phase evolution from boride to electroactive Fe-doped NiOOH. In addition, density functional theory calculations imply that Fe dopants can improve intrinsic catalytic activity via electronic structure regulation of the self-evolved NiOOH and forming heterogeneous bimetallic active sites for UOR. This study provides meaningful insights into the crystallinity-dependent UOR performance and effective strategies to develop efficient UOR (pre)catalysts with dual active sites. Significantly, the demonstrated direct wastewater (urine) electrolysis paves the way for net zero buildings -targeted human waste reutilization.
Keywords
URL[Source Record]
Language
English
SUSTech Authorship
First
ESI Research Field
ENGINEERING
Scopus EID
2-s2.0-85152708614
Data Source
Scopus
Citation statistics
Cited Times [WOS]:0
Document TypeJournal Article
Identifierhttp://kc.sustech.edu.cn/handle/2SGJ60CL/528182
DepartmentSchool of Environmental Science and Engineering
理学院_化学系
深圳格拉布斯研究院
Affiliation
1.State Environmental Protection Key Laboratory of Integrated Surface Water-Groundwater Pollution Control,Shenzhen Key Laboratory of Interfacial Science and Engineering of Materials (SKLISEM),School of Environmental Science and Engineering,Southern University of Science and Technology,Shenzhen,518055,China
2.Centre for Technology in Water and Wastewater,School of Civil and Environmental Engineering,University of Technology Sydney,2007,Australia
3.School of Minerals Processing and Bioengineering,Central South University,Changsha,410083,China
4.Department of Chemistry and Shenzhen Grubbs Institute,Southern University of Science and Technology,Shenzhen,518055,China
First Author AffilicationSchool of Environmental Science and Engineering
First Author's First AffilicationSchool of Environmental Science and Engineering
Recommended Citation
GB/T 7714
Chen,Zhijie,Zheng,Renji,Zou,Haiyuan,et al. Amorphous iron-doped nickel boride with facilitated structural reconstruction and dual active sites for efficient urea electrooxidation[J]. Chemical Engineering Journal,2023,465.
APA
Chen,Zhijie.,Zheng,Renji.,Zou,Haiyuan.,Wang,Ranhao.,Huang,Changzhu.,...&Chen,Hong.(2023).Amorphous iron-doped nickel boride with facilitated structural reconstruction and dual active sites for efficient urea electrooxidation.Chemical Engineering Journal,465.
MLA
Chen,Zhijie,et al."Amorphous iron-doped nickel boride with facilitated structural reconstruction and dual active sites for efficient urea electrooxidation".Chemical Engineering Journal 465(2023).
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