Printed Co3O4 film as an electrocatalyst for hydrogen production by a monolithic photovoltaic-electrolysis system

Hyo Sang Jeon, Wonil Park, Jaehoon Kim, Honggon Kim, Woong Kim, Byoung Koun Min

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)


In a monolithic photovoltaic-electrolysis system, photovoltaic and catalytic layers are generally constructed on both sides of a conducting substrate. For the realization of this architecture it is critical to fabricate the catalytic layer at sufficiently low temperature in order not to deteriorate the photovoltaic photoanode that is already installed on the reverse side of the catalytic layer. In this study we demonstrate successful fabrication of Co 3O4 electrocatalyst films at low temperature (∼50 °C) on a stainless steel substrate by a paste coating method using Nafion as a binder. The Co3O4 films were found to be catalytically efficient and stable in water splitting reaction in an alkaline aqueous solution. More importantly, the Co3O4 films casted at low temperature (∼50°C) revealed the highest hydrogen production rate in the electrolytic cell compared to the films prepared at higher temperatures (e.g. 150 and 300°C), which would be very beneficial in the construction of a monolithic photovoltaic-electrolysis system.

Original languageEnglish
Pages (from-to)1924-1929
Number of pages6
JournalInternational Journal of Hydrogen Energy
Issue number3
Publication statusPublished - 2011 Feb

Bibliographical note

Funding Information:
We gratefully acknowledge the support of the program of Korea Institute of Science and Technology (KIST) as well as the “National Agenda Project” program of Korea Research Council of Fundamental Science & Technology (KRCF).

Copyright 2011 Elsevier B.V., All rights reserved.


  • CoO
  • Electrocatalysts
  • Hydrogen
  • Nafion
  • Water splitting

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Fuel Technology
  • Condensed Matter Physics
  • Energy Engineering and Power Technology


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