Selectivity of Oxygen Evolution Reaction on Carbon Cloth-Supported δ-MnO₂ Nanosheets in Electrolysis of Real Seawater.

Content Provider	Europe PMC
Author	Yan, Haofeng Wang, Xuyun Linkov, Vladimir Ji, Shan Wang, Rongfang
Editor	Colmati, Flávio
Copyright Year	2023
Abstract	Electrolysis of seawater using solar and wind energy is a promising technology for hydrogen production which is not affected by the shortage of freshwater resources. However, the competition of chlorine evolution reactions and oxygen evolution reactions on the anode is a major obstacle in the upscaling of seawater electrolyzers for hydrogen production and energy storage, which require chlorine-inhibited oxygen evolution electrodes to become commercially viable. In this study, such an electrode was prepared by growing δ-MnO2 nanosheet arrays on the carbon cloth surface. The selectivity of the newly prepared anode towards the oxygen evolution reaction (OER) was 66.3% after 30 min of electrolyzer operation. The insertion of Fe, Co and Ni ions into MnO2 nanosheets resulted in an increased number of trivalent Mn atoms, which had a negative effect on the OER selectivity. Good tolerance of MnO2/CC electrodes to chlorine evolution in seawater electrolysis indicates its suitability for upscaling this important energy conversion and storage technology.
Journal	Molecules
Volume Number	28
DOI	10.3390/molecules28020854
PubMed Central reference number	PMC9863582
Issue Number	2
PubMed reference number	36677912
e-ISSN	14203049
Language	English
Publisher	Molecular Diversity Preservation International (MDPI)
Publisher Date	2023-01-14
Access Restriction	Open
Subject Keyword	MnO2 anode oxygen evolution reaction hydrogen production seawater electrolysis
Content Type	Text
Resource Type	Article
Subject	Physical and Theoretical Chemistry Medicine Chemistry Drug Discovery Pharmaceutical Science Analytical Chemistry Molecular Medicine Organic Chemistry