期刊
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
卷 18, 期 20, 页码 13811-13819出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c6cp01646d
关键词
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资金
- Ministry of Education, Culture, Sports, Science, and Technology (MEXT) of Japan [2406]
- Precursory Research for Embryonic Science and Technology (PRESTO)
- Japan Science and Technology Agency (JST)
- Program for Elements Strategy Initiative for Catalysts & Batteries (ESICB)
- JSPS Research Fellowships
- Grants-in-Aid for Scientific Research [24107005, 14J03430, 15H04187] Funding Source: KAKEN
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 M2+-M3+ LDH are clearly influenced by the type of trivalent metal (M3+) components.
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