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An Amiable Design of Cobalt Single Atoms as the Active Sites for Oxygen Evolution Reaction in Desalinated Seawater.
- Source :
-
Small (Weinheim an der Bergstrasse, Germany) [Small] 2024 Jan; Vol. 20 (1), pp. e2305289. Date of Electronic Publication: 2023 Aug 30. - Publication Year :
- 2024
-
Abstract
- Green fuel from water splitting is hardcore for future generations, and the limited source of fresh water (<1%) is a bottleneck. Seawater cannot be used directly as a feedstock in current electrolyzer techniques. Until now single atom catalysts were reported by many synthetic strategies using notorious chemicals and harsh conditions. A cobalt single-atom (CoSA) intruding cobalt oxide ultrasmall nanoparticle (Co <subscript>3</subscript> O <subscript>4</subscript> USNP)-intercalated porous carbon (PC) (CoSA-Co <subscript>3</subscript> O <subscript>4</subscript> @PC) electrocatalyst was synthesized from the waste orange peel as a single feedstock (solvent/template). The extended X-ray absorption fine structure spectroscopy (EXAFS) and theoretical fitting reveal a clear picture of the coordination environment of the CoSA sites (CoSA-Co <subscript>3</subscript> O <subscript>4</subscript> and CoSA-N <subscript>4</subscript> in PC). To impede the direct seawater corrosion and chlorine evolution the seawater has been desalinated (Dseawater) with minimal cost and the obtained PC is used as an adsorbent in this process. CoSA-Co <subscript>3</subscript> O <subscript>4</subscript> @PC shows high oxygen evolution reaction (OER) activity in transitional metal impurity-free (TMIF) 1 M KOH and alkaline Dseawater. CoSA-Co <subscript>3</subscript> O <subscript>4</subscript> @PC exhibits mass activity that is 15 times higher than the commercial RuO <subscript>2</subscript> . Theoretical interpretations suggest that the optimized CoSA sites in Co <subscript>3</subscript> O <subscript>4</subscript> USNPs reduce the energy barrier for alkaline water dissociation and simultaneously trigger an excellent OER followed by an adsorbate evolution mechanism (AEM).<br /> (© 2023 Wiley-VCH GmbH.)
Details
- Language :
- English
- ISSN :
- 1613-6829
- Volume :
- 20
- Issue :
- 1
- Database :
- MEDLINE
- Journal :
- Small (Weinheim an der Bergstrasse, Germany)
- Publication Type :
- Academic Journal
- Accession number :
- 37649146
- Full Text :
- https://doi.org/10.1002/smll.202305289