Trace F-doped Co3O4 nanoneedles for enhanced acidic water oxidation activity via promoting OH coverage

Exploring Earth-abundant and efficient electrocatalysts to replace Ir and Ru for the acidic oxygen evolution reaction (OER) is essential to reduce the cost of clean hydrogen production. Here, we show that trace amounts of electronegative non-metallic element fluorine (F)-doped Co3O4 nanoneedles impr...

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Published in:Green chemistry : an international journal and green chemistry resource : GC 2024-09, Vol.26 (18), p.9782-9790
Main Authors: Genyan Hao, Zhao, Tao, Fang, Qiang, Jia, Yunzhen, Li, Dandan, Zhong, Dazhong, Li, Jinping, Zhao, Qiang
Format: Article
Language:English
Subjects:
Acidic oxides
Acidic water
Catalysts
Cobalt oxides
Electrocatalysts
Electron transfer
Electronegativity
Fluorine
Hydrogen production
Intermediates
Noble metals
Oxidation
Oxygen evolution reactions
Surface stability
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Summary:Exploring Earth-abundant and efficient electrocatalysts to replace Ir and Ru for the acidic oxygen evolution reaction (OER) is essential to reduce the cost of clean hydrogen production. Here, we show that trace amounts of electronegative non-metallic element fluorine (F)-doped Co3O4 nanoneedles improve the activity and stability of Co3O4. The F-doped Co3O4 nanoneedles supported on carbon paper (F-Co3O4/CP) exhibit an overpotential of 350 mV at 10 mA cm−2 for the acidic OER. In addition, their performance remains consistent after continuous operation for 80 h. Detailed investigations reveal that introducing an anion promotes the enrichment of OH on the surface of Co3O4 and prevents acid corrosion, thereby enhancing the intrinsic OER activity and stability. Theoretical calculations further indicate that F doping can effectively improve electron transfer and optimize the energy barrier for the formation of *OOH intermediates, which significantly improves OER performance. This study provides guidance for designing efficient and stable non-noble metal acidic water oxidation catalysts.
ISSN:1463-9262
1463-9270
DOI:10.1039/d4gc01895h