Fabrication of CuBi2O4 photocathode through novel anodic electrodeposition for solar hydrogen production

• Nakabayashi, Yukihiro

• Nishikawa, Masami

• Nosaka, Yoshio

抄録

Article

Copper bismuth oxide (CuBi2O4) film electrodes were fabricated by anodic co-electrudepusitiun of Bi2O3 and CuO, followed by heat treatment in air at 500 ℃. The compositions of the electrolyte solution, such as concentrations of Cu2+, Bi3+, and tartaric acid, alkaline strength, and temperature, were optimized to fabricate pure CuBi2O4 films on FTO substrates. XRD and optical absorption were employed to confirm the formation of CuBi2O4, and SEM observation showed the fabrication of a closed packed film with good contact to the FTO substrate. Mott-Schottky plots based on Nyquist plots at various potentials gave the flat band potential of 0.62 V (vs. Ag/AgCl) at pH 6.0. Since the band gap energy measured was 1.80 eV, the conduction band bottom locates at -0.98 V (vs. NHE). At the potential more negative than 0 V (vs. Ag/AgCl), the photo cathodic current fur hydrogen production was observed under visible light irradiation in a deoxygenated 0.1M Na2SO4 solution. The film electrode sustained the photo electrochemical activity in the electrolyte solution at -0.3 V (vs. Ag/AgCl), at least, for 100 min.

収録刊行物

• Electrochimica Acta

  Electrochimica Acta 125 191-198, 2014

  Elsevier

キーワード

• Cu-electrudepusitiun
• tartaric acid
• phutuelectruchemical cell

詳細情報

• CRID: 1050001338036787840
• NII論文ID: 120006576440
• ISSN: 00134686
• DOI: 10.1016/j.electacta.2014.01.088
• HANDLE: 10649/00000985
• Web Site: https://nagaokaut.repo.nii.ac.jp/records/802
• Web Site: https://api.elsevier.com/content/article/PII:S001346861400156X?httpAccept=text/plain
• Web Site: https://api.elsevier.com/content/article/PII:S001346861400156X?httpAccept=text/xml
• 本文言語コード: en
• 資料種別: journal article
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