期刊
CATALYSIS TODAY
卷 251, 期 -, 页码 140-144出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.cattod.2014.09.005
关键词
CO2 conversion; Photocatalyst; Layered double hydroxides; Aqueous solution; Chloride ion
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 Element Strategy Initiative for Catalysts & Batteries (ESICB)
- Grants-in-Aid for Scientific Research [14J03430, 24107005] Funding Source: KAKEN
We found that various layered double hydroxides (LDHs) showed good activity for the photocatalytic conversion of CO2 in an aqueous solution. Isotope experiments using (CO2)-C-13 as a substrate clearly revealed that CO was generated as a main reduction product of CO2. Ni-Al LDH (Ni/Al = 4) exhibited the largest amount of CO evolved among the various kinds of LDHs. Especially, Ni-Al LDHs fabricated from chlorides showed the higher conversion of CO2 to CO than those from nitrates. The amount of CO evolved was increased by the addition of chloride ions into the reaction solution, on the other hand, the addition of carbonate and hydrocarbonate ions did not enhance the conversion of CO2 but promoted the selectivity to H-2 evolution for water splitting. (C) 2014 Elsevier B.V. All rights reserved.
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