Self-Supportive Bimetallic Selenide Heteronanostructures as High-Efficiency Electro(pre)catalysts for Water Oxidation

Ranjith Bose, K. Karuppasamy, Paulraj Arunkumar, Ganesh Kumar Veerasubramani, Sampath Gayathri, P. Santhoshkumar, Dhanasekaran Vikraman, Jong Hun Han, Hyun Seok Kim, Akram Alfantazi

Research output: Contribution to journalArticlepeer-review

17 Scopus citations


Developing oxygen evolution reaction (OER) catalysts is intricate and challenging, involving a four-electron transport process coupled with conversion of O-H bonds into O-O bonds. This paper proposes a simple one-step synthetic strategy for preparing self-supported Cu2Se/NiSe2heteronanostructure electrodes for the OER with well-defined heterointerfaces by directly embedding onto the conductive nickel foam substrate. The prepared catalyst significantly enhances OER activity with low overpotentials of 277 and 290 mV at current densities of 50 and 100 mA cm-2, respectively, which is attributed to electronic structure modulation by synergetic interactions and enhanced charge transportation between Cu2Se and NiSe2nanostructures. The as-prepared electrodes achieved high durability in 1 M KOH, retaining initial activity levels after 24 h continuous operation. We performed comprehensive spectroscopic and microscopic characterization before and after the OER to clarify active species and relate them to OER catalysis. Enhanced catalyst efficiency arises from integrating multicomponent electrocatalytic systems, which has been emphasized by the present findings.

Original languageBritish English
Pages (from-to)13114-13123
Number of pages10
JournalACS Sustainable Chemistry and Engineering
Issue number38
StatePublished - 27 Sep 2021


  • earth-abundant elements
  • electrocatalysis
  • heterogeneous catalysis
  • heteronanostructure
  • oxygen evolution
  • water splitting


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