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Journal of Materials Science

, Volume 54, Issue 18, pp 11951–11958 | Cite as

Boosting the performance of delafossite photocathode through constructing a CuFeO2/CuO heterojunction for photoelectrochemical water reduction

  • Tengfei JiangEmail author
  • Yu Zhao
  • Huaiguo XueEmail author
Energy materials
  • 26 Downloads

Abstract

CuFeO2 is a promising photocathode material with favorable band gap and chemical stability in alkaline electrolytes. However, CuFeO2 is suffered from poor photoinduced electron–hole separation and collection. In this paper, we utilize a heterojunction strategy for inhibiting charge recombination and enhancing its photoelectrochemical performance. CuFeO2/CuO heterojunction photocathodes were prepared by a facile spin coating method, which were used for photoelectrochemical water reduction. A high photocurrent as much as 50 μA/cm2 after 600 s irradiation of white light at the potential of − 0.5 V versus Ag/AgCl electrode is observed, which is higher than those of the pure CuFeO2 and CuO photocathodes. The effect of the interfacial electric field on the behaviors of photoinduced charge carriers is studied. It is the interfacial electric field that extends the lifetime of photoinduced charge carriers and promotes the charge separation efficiency, which results high performance and good durability.

Notes

Acknowledgements

For financial support, the authors are grateful to the National Natural Science Foundation of China (Grant No. 21673203), the Natural Science Foundation of Jiangsu Province (Grant No. BK20170486), the Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD), and Top-notch Academic Programs Project of Jiangsu Higher Education Institutions (TAPP).

Supplementary material

10853_2019_3747_MOESM1_ESM.docx (700 kb)
Supplementary material 1 (DOCX 700 kb)

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© Springer Science+Business Media, LLC, part of Springer Nature 2019

Authors and Affiliations

  1. 1.School of Chemistry and Chemical EngineeringYangzhou UniversityYangzhouPeople’s Republic of China

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