Facile synthesis of copper oxide-cobalt oxide/nitrogen-doped carbon (Cu2O-Co3O4/CN) composite for efficient water splitting


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Shaikh Z. A., Moiseev N., Mikhaylov A., YÜKSEL S.

Applied Sciences (Switzerland), vol.11, no.21, 2021 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 11 Issue: 21
  • Publication Date: 2021
  • Doi Number: 10.3390/app11219974
  • Journal Name: Applied Sciences (Switzerland)
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Aerospace Database, Agricultural & Environmental Science Database, Applied Science & Technology Source, Communication Abstracts, INSPEC, Metadex, Directory of Open Access Journals, Civil Engineering Abstracts
  • Keywords: water splitting, hydrogen evolution reaction, oxygen evolution reaction, electrocatalyst, Cu2O-Co3O
  • Istanbul Medipol University Affiliated: Yes

Abstract

Herein, we report a copper oxide-cobalt oxide/nitrogen-doped carbon hybrid (Cu2O Co3O4/CN) composite for electrochemical water splitting. Cu2O-Co3O4/CN is synthesized by an easy two-step reaction of melamine with Cu2O-Co3O4/CN composite. The designed composite is aimed to solve energy challenges by producing hydrogen and oxygen via electrochemical catalysis. The proposed composite offers some unique advantages in water splitting. Carbon imparts superior conductivity, while the water oxidation abilities of Cu2O and Co3O4 are considered to constitute a catalyst. The synthesized composite (Cu2O-Co3O4/CN) is characterized by SEM, EDS, FTIR, TEM, and AFM in terms of the size, morphology, shape, and elemental composition of the catalyst. The designed catalyst’s electrochemical performance is evaluated via linear sweep voltammetry (LSV) and cyclic voltammetry (CV). The Cu2O-Co3O4/CN composite shows significant electrocat alytic activity, which is further improved by introducing nitrogen doped carbon (current density 10 mA cm-2, onset potential 91 mV, and overpotential 396 mV).