Investigation of the electrochemical and photoelectrochemical properties of Ni-Al LDH photocatalysts.

نویسندگان

  • Shoji Iguchi
  • Soichi Kikkawa
  • Kentaro Teramura
  • Saburo Hosokawa
  • Tsunehiro Tanaka
چکیده

Layered double hydroxide (LDH) photocatalysts, including Ni-Al LDH, are active for the photocatalytic conversion of CO2 in water under UV light irradiation. In this study, we found that a series of LDHs exhibited anodic photocurrent which is a characteristic feature corresponding to n-type materials. Also, we estimated the potentials of photogenerated electrons and holes for LDHs, which are responsible for the photocatalytic reactions, using electrochemical techniques. The flat band potential of the Ni-Al LDH photocatalyst was estimated to be -0.40 V vs. NHE (pH = 0), indicating that the potential of the photogenerated electron is sufficient to reduce CO2 to CO. Moreover, we revealed that the flat band potentials of M(2+)-M(3+) LDH are clearly influenced by the type of trivalent metal (M(3+)) components.

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عنوان ژورنال:
  • Physical chemistry chemical physics : PCCP

دوره 18 20  شماره 

صفحات  -

تاریخ انتشار 2016