Activating lattice oxygen in local amorphous S-modified NiFe-LDH ultrathin nanosheets toward superior alkaline/natural seawater oxygen evolution.
J Colloid Interface Sci
; 677(Pt A): 853-862, 2024 Aug 06.
Article
in En
| MEDLINE
| ID: mdl-39126803
ABSTRACT
The admire activity, selective and corrosion resistance electrocatalysts for oxygen evolution reaction (OER) are the bottleneck restricting seawater electrolysis owing to the side reactions of chloride ions (Cl-). Herein, we developed a local amorphous S-modified NiFe-LDH ultrathin nanosheets with large spacing on NiFe foam (la-S-NiFe-LDH/NFF) in-situ via the fast H2O2 assisted etching-anion regulation, resulting in a superior OER catalytic activity for seawater electrolysis. Benefitting from the local amorphous architecture induced by S, enhanced the metal-oxygen covalency, triggered lattice oxygen activity, and reduced the desorption energy of O2, the la-S-NiFe-LDH/NFF accelerated the OER progress via the lattice-oxygen-mediated (LOM) mechanism. Additionally, the preferential adsorbed OH- and reconstructed SO42- cooperated to prevent the proximity and erosion of Cl- and enhanced the corrosion resistance for seawater electrolysis. The assembled electrolyzer of Pt/C || la-S-NiFe-LDH/NFF possessed an industrial level of 500 mA cm-2 at 1.83 V potential for seawater electrolysis, and sustained response for 100 h.
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Collection:
01-internacional
Database:
MEDLINE
Language:
En
Journal:
J Colloid Interface Sci
Year:
2024
Document type:
Article
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