????:Si, ???????

1
???????????????
????????????? ??????? b)???????????????(2)
????
????Si, ??????? ????????? ??
?????????
????????????????
????????????
?????? ??????????
?????? ??????????
2
??? ??????(4)
???? ??????
???
H2
?? ???????????????????????

e-
e-
e-
???
2H
????
H2O
h
1/2O2
??????, 72, 108(1969). Bull. Chem. Soc. Jpn., 44,
1148(1971). Nature, 238, 37(1972).
3
??? ???? ??(5)
????? ?? ????? ? ???????????
?????
4
?????(???)?????????UV-vis?????
?????? ?????
Wavelength/nm
?????(??)
5
Rh-Cr oxide/GaNZnO???????????
? gt 400 nm
Catalyst 0.3 g Cocat. Rh 1 wt, Cr 1.5
wt Reactant soln. 370 mL (pH 4.5) Inner
irradiation type cell with a 2 M NaNO2 aq.
filter 450 W Hg lamp
???? 5.2 ( at 410 nm)
450 W high pressure Hg lamp
Water cooling
NaNO2 aq.
Magnetic stirrer
6
Z????
????????????????????????? (?????? ?????)
???
??????????????????????????????,?????????,?????????
??????????
???? (?gt420nm)
??300W Xe?????????????
7
?????
??? I
??? II
??
??
??
??
????? (????) CO2
??? I
?????
??? II
????? (????) H2O
????
????????
??????????????????????????????????????10? ????????
????????????????????????????????? CO2?????????????
CO2??????????????????????? ????????????????
8
CO2 red????
Ag(2wt) /BaLa4Ti4O15???????CO2???? (??????
?????)
?????????????????
? ????? ?(???????)??
200 150 100 50 0
CO
????????CO2? ????????
e-/h1.0
O2
Amounts of products / µmol
H2
??? ???? ??(6)
Kosuke Iizuka, Tomoaki Wato, Yugo Miseki, Kenji
Saito, and Akihiko Kudo J. Am. Chem. Soc.,
2011, 133 (51), 2086320868
9
????????? (???????????H2O???CO2?????)
??? ???? ??(7)
????
Shunsuke Sato, Takeo Arai, Takeshi Morikawa,
Keiko Uemura, Tomiko M. Suzuki, Hiromitsu Tanaka,
and Tsutomu Kajino , J. Am. Chem. Soc., 2011,
133, 1524015243.
S. Sato and T. Arai et al. J. Am. Chem. Soc.
2011, 133, 15240.
10
?????????????????????????????
????????????
???2050????????????? 1/3?????????????????
1????????????10, 5 km x 5 km 25 km2???????????
?10,000??????????
??????????????
????????????????? ?????
??
??(???)
11
??(???)
12
???????????????
?????(1) ???????????!
? ?????(CSP) ????
? ?????(PV) ????
? ???????
? ???????
13
?????(2)

• Solar Fuel
• ???CO???(HCOOH) (2???????)
• ????????(HCHO) (4??????)
• ?????(CH3OH) (6???????)
• ???(CH4) (8???????)
• C2???Cn???

?????????????
??????????????????
14
?????(3)

• ???????
• ??(??)???!
• ????????
• ???????????
• ????????
• ????

15
?????(4)

• ???????????????????
• ???????????(????)??????????
• ?????????????????????????
• ????????????????????????
• ????? ????? ???????????

16
????????????????????
2050
?????????
2040
???????
2030
???? ??1 ??2??n
2020
????????
???? ??1 ??2 ??n
?????? ??1 ??2 ??n
???? ??1 ??2 ??n
17
?????(5) ?????????????
??
??????????
?????? ????? ???? ?????
?????????????
18
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• ????

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19
(No Transcript)
20
PRESTO Project on Artificial Photo-synthesis (2009
-2017) JST
Preliminary Research on Embryonic Science
and Technology Sakigake (Japanese)
21
(No Transcript)
22
?????????? ?????????????? ????? ????????? ?? ??
23
????????
???????
???
24
???????????
????
????????????? ??
25
Thanks to Klaus Lips, Prof.
Thomas Moore
??????????
The translation of the German phrase on the
Cartoon is "this is how we live, this is how we
live, forever..."