Electro-synthesized Co(OH)₂@CoSe with Co-OH active sites for overall water splitting electrocatalysis.

ABSTRACT: Constructing noble metal-free electrocatalytically active sites for the simultaneous hydrogen evolution reaction (HER) and oxygen evolution reaction (OER) in alkaline solution is key to realizing electricity-driven water splitting in practical applications. Here, we rationally designed Co(OH)₂@CoSe nanorods (NRs) as an excellent bifunctional electrocatalyst by an in situ electrochemical transformation strategy, where the Co-based nanorod template was converted into Co(OH)₂@CoSe at the cathode. The obtained electrode exhibits superior electrocatalytic activity for both the HER (overpotential of 208 mV at 20 mA cm^-2) and the OER (268 mV at 20 mA cm^-2) at high current density in a 1 M KOH solution. The theoretical calculations and experimenta

SUBMITTER: Wang Y 

PROVIDER: S-EPMC9417052 | biostudies-literature | 2020 Feb

REPOSITORIES: biostudies-literature