Abstract
A facile in situ partial surface-oxidation strategy to integrate CoO domains with CoSe2 nanobelts on Ti mesh (denoted as CoO/CoSe2) via direct calcination of CoSe2-diethylenetriamine precursors is reported. The resulted self-supported CoO/CoSe2 exhibits an outstanding activity and stability in neutral media toward both hydrogen evolution reaction and oxygen evolution reaction.
Highlights
Metallic electrocatalysts have sparked great interest owing to their good conductivity and remarkable electroactivity.[14]
We present a facile in situ partial surface-oxidation strategy to integrate CoO domains with CoSe2 nanobelts on Ti mesh as a novel, highly active and stable self-supported electrocatalyst for both hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) under neutral conditions
It is believed that the unique 3D self-supported porous architecture and the chemical synergistic effect between metallic CoSe2 and in situ surface oxidized CoO domains thereon lead to the excellent performance
Summary
Metallic electrocatalysts have sparked great interest owing to their good conductivity and remarkable electroactivity.[14]. Energy-dispersive X-ray (EDX) analysis shows the existence of Co, Se, and O elements, further confirming the formation of CoO/CoSe2 (Figure S2, Supporting Information).
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