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Title:Stable seawater oxidation with a self-healing oxygen-evolving catalyst
Authors:ID Zhang, Xiaojian (Author)
ID Feng, Chao (Author)
ID Fan, Zeyu (Author)
ID Zhang, Beibei (Author)
ID Xiao, Yequan (Author)
ID Mavrič, Andraž (Author)
ID Pastukhova, Nadiia (Author)
ID Valant, Matjaž (Author)
ID Han, Yi-Fan (Author)
ID Li, Yanbo (Author)
Work type:Unknown
Typology:1.01 - Original Scientific Article
Organization:UNG - University of Nova Gorica
Abstract:Direct seawater electrolysis is key to massive hydrogen fuel production without the depletion of precious freshwater resources and the need for high-purity electrolytes. However, the presence of high-concentration chloride ions (Cl−) and alkaline-earth metal ions (Mg2+, Ca2+) poses great challenges to the stability and selectivity of the catalysts for seawater splitting. Here, we demonstrate a self-healing oxygen evolution reaction (OER) catalyst for long-term seawater electrolysis. By suppressing the competitive chlorine evolution reaction and precipitating the alkaline-earth metal ions through an alkaline treatment of the seawater, stable seawater oxidation is achieved owing to the self-healing ability of the borate-intercalated nickel–cobalt–iron oxyhydroxides (NiCoFe-Bi) OER catalyst under highly-alkaline conditions. The self-healing NiCoFe-Bi catalyst achieves stable seawater oxidation at a large current density of 500 mA cm−2 for 1000 h with near unity Faraday efficiency. Our results have demonstrated strong durability and high OER selectivity of the self-healing catalyst under harsh conditions, paving the way for industrial large-scale seawater electrolysis.
Keywords:chemistry, electrocatalysis, seawater oxidation, oxygen evolution reaction
Publication date:01.05.2023
Year of publishing:2023
Number of pages:str. 3103-3111
Numbering:Vol. 10, issue 10
PID:20.500.12556/RUNG-8194-9ff77878-bfb8-ee4a-36b6-820ee4a7840b New window
COBISS.SI-ID:151244291 New window
ISSN on article:2052-1553
DOI:10.1039/D3QI00470H New window
Publication date in RUNG:08.05.2023
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Record is a part of a journal

Title:Inorganic chemistry frontiers
Shortened title:Inorg. chem. front.
Publisher:Royal Society of Chemistry
COBISS.SI-ID:6083354 New window

Document is financed by a project

Funder:ARRS - Slovenian Research Agency
Project number:P2-0412
Name:Heterogeni procesi na površinah trdnin za trajnostne tehnologije

Funder:ARRS - Slovenian Research Agency
Project number:Z1-3189
Name:Transportne lastnosti dvodimenzionalnih konjugiranih polimerov

Funder:ARIS - Slovenian Research and Innovation Agency
Project number:J2-2498
Name:Redukcija ogljikovega dioksida na katalizatorju z izoliranimi atomi za tvorbo spojin z dodano vrednostjo