P-Type CuBi2O4: An easily accessible photocathodic material for high-efficiency water splitting

Dawei Cao, Nasori Nasori, Zhijie Wang*, Yan Mi, Liaoyong Wen, Ying Yang, Shengchun Qu, Zhanguo Wang, Yong Lei

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

125 Citations (Scopus)

Abstract

In view of the disadvantages of the conventional photocathodic materials, we focus on exploiting new candidates for a high-efficiency photoelectrochemical (PEC) system. Herein, we report on the fabrication of CuBi2O4 (CBO) films on FTO (fluorine doped tin oxide) and FTO/Au substrates, respectively, through the electrochemical deposition approach. It was observed that the presence of a Au thin layer could help to improve the crystal quality of the grown CBO films, promote the separation of photo-generated charges in the corresponding material and reduce the resistance of the system. In comparison with the FTO/CBO, the FTO/Au/CBO photocathode presents a remarkable improvement in the photocurrent, from -0.23 mA cm-2 to -0.50 mA cm-2 at 0.1 V vs. RHE. After optimizing the PEC system by depositing Pt nanoparticles on the CBO films, the plateau photocurrent was further amplified to -1.24 mA cm-2. These data indicate an attractive p-type material in photoelectrochemistry, without concern for the corrosion problem in aqueous electrolytes.

Original languageEnglish
Pages (from-to)8995-9001
Number of pages7
JournalJournal of Materials Chemistry A
Volume4
Issue number23
DOIs
Publication statusPublished - 2016
Externally publishedYes

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