A sea anemone-like CuO/Co₃O₄ composite: an effective catalyst for electrochemical water splitting

Abstract

A facile unipolar pulse electrodeposition combined with the thermal oxidation method was applied for fabrication of CuO/Co3O4 composites on carbon electrode for water electrolysis, and it was found that the sea anemone-like one with a 3D hierarchical structure formed at -0.8 V exhibited excellent performance for water electrolysis at a low overpotential with high stability.

Fabrication of Cu(OH)2@NiFe-layered double hydroxide catalyst array for electrochemical water splitting

“…10, the electrode prepared by UPED had higher current density than others. Here, the pulse waveform of UPED consisted of an applied cathodic potential during the on-period and an open- circuit potential (OCP, zero current) during the off-period [5,6]. In this case, the OCP during the off-time can be controlled automatically.…”

Nanostructured catalysts for electrochemical water splitting: current state and prospects

“…To date, various catalytic materials such as Co2MnO4 195 ,NiCo2O4 196 ,SnO2 198 ,and NiO2 199 were employed to enhance the performance of Co3O4 or build 3D heterostructure. Our group employed a facile UPED process combined with a thermal oxidation way to fabricate CuO/Co3O4 composites with various novel morphologies 200 . Recently, Co based catalysts with a more rational 3D core/shell heterostructures also attracted considerable attentions since their high surface area, fast electron and electrolyte transfer.…”

Thickness-dependent photoelectrochemical properties of a semitransparent Co3O4 photocathode

“…It therefore may be applied as a protective heterojunction layer to overcome the typical overpotential in photoactive materials. Examples of materials used in such applications include Cu x O [ 19 , 29 ], CdS [ 30 ], TiO 2 [ 31 ], Fe 2 O 3 [ 32 ], and BiVO 4 [ 33 – 34 ]. To absorb light with Co 3 O 4 , an adequately thick film is required.…”