3D-Graphene Decorated with g-C3N4/Cu3P Composite: A Noble Metal-free Bifunctional Electrocatalyst for Overall Water Splitting

Sk Riyajuddin, S. K. Tarik Aziz, Sushil Kumar, Gilbert D. Nessim, Kaushik Ghosh

Research output: Contribution to journalArticlepeer-review

51 Scopus citations


Electrochemical water splitting, which generates both hydrogen and oxygen, using highly efficient and low-cost noble metal-free (Pt, Ru, Ir etc.) electrocatalyst is an economical and green approach for the alternative energy source. Due to their conductivity, durability and long-term stability, carbonaceous containing hybrid materials are used as promising electrodes for total water splitting. Herein, the design of metal-phosphide (Cu3P) with graphitic carbon-nitride (g-C3N4) nanocomposite on 3D-graphene is reported, a new model electrocatalyst that in turn, render superior electrocatalytic performance with long-term stability. The excellent electrocatalytic performance is analyzed in terms of overpotentials of 67 mV and 255 mV at a current density of 10 mA/cm2 with a small Tafel slope of 45 and 40 mV/dec for hydrogen evolution reaction (HER) and oxygen evolution reaction (OER), respectively. The overall water splitting performance has been tested in 1 M KOH electrolyte, and the catalyst exhibits a very low cell voltage of 1.54 V to achieve a current density of 10 mA/cm2 with impressive stability of at least 35 hours with no loss of potential. This work sheds new insight into the design and synthesis of highly stable electrocatalyst that could be an apt choice for an attractive paradigm for commercial water electrolysis in renewable electrochemical energy conversion.

Original languageEnglish
Pages (from-to)1394-1402
Number of pages9
Issue number5
StatePublished - 6 Mar 2020

Bibliographical note

Funding Information:
The authors are thankful to Nanomission (Grant No-SR-/NM/NS-91/2016), Department of Science and Technology, Govt. of India.

Publisher Copyright:
© 2019 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim


  • 3D-Graphene
  • Copper phosphide (CuP)
  • Graphitic carbon nitride (g-CN)
  • Hydrogen evolution reaction (HER)
  • Overall water splitting
  • Oxygen evolution reaction (OER)


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