MWCNTs and Cu2O sensitized Ti–Fe2O3 photoanode for improved water splitting performance

Anuradha Verma, Anupam Srivastav, Shailja Sharma, Pavan Badami, Vibha Rani Satsangi, Rohit Shrivastav, Arunachala Mada Kannan, Devesh Kumar Avasthi, Sahab Dass

Research output: Contribution to journalArticle

5 Scopus citations

Abstract

Fe2O3 and Cu2O, both earth abundant materials are used in functionalizing Ti doped Fe2O3 photoanodes with Cu2O and MWCNTs for improving photoelectrochemical performance for hydrogen generation. Pristine Ti doped Fe2O3 are fabricated by spray pyrolysis deposition method on the conducting ITO coated glass substrate. Two different modifications are adopted to improve the photoelectrochemical performance of pristine sample by subsequent deposition of multi walled carbon nano tubes (MWCNTs) alone and also in combination with Cu2O. Better photoresponse in modified samples is attributed to increase in conductivity and promotion of electron transport to Fe2O3 layer due to presence of MWCNTs while formation of heterojunction also promotes charge transfer kinetics by effective separation of charge carriers. Offering high photocurrent density of 5.17 mA cm−2 at 1 V vs SCE, high open circuit voltage (Voc), least resistance, higher negative flat band potential (Vfb), Ti–Fe2O3/(MWCNTs + Cu2O), emerges as the most photoactive sample. High applied bias photon to current conversion efficiency (ABPE) value of 4.6% is obtained for the modified sample against 0.07% ABPE for Ti–Fe2O3 photoanodes.

Original languageEnglish (US)
Pages (from-to)6049-6059
Number of pages11
JournalInternational Journal of Hydrogen Energy
Volume43
Issue number12
DOIs
StatePublished - Mar 22 2018

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Keywords

  • Copper oxide
  • Heterojunction
  • Hydrogen generation
  • Multi-walled carbon nano tubes
  • Photoelectrochemical activity

ASJC Scopus subject areas

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

Cite this

Verma, A., Srivastav, A., Sharma, S., Badami, P., Satsangi, V. R., Shrivastav, R., Mada Kannan, A., Avasthi, D. K., & Dass, S. (2018). MWCNTs and Cu2O sensitized Ti–Fe2O3 photoanode for improved water splitting performance. International Journal of Hydrogen Energy, 43(12), 6049-6059. https://doi.org/10.1016/j.ijhydene.2018.01.204