Table 12.1
(continued)
Photocatalysts
Cocatalysts
Optimal product yield
(μmol/gÁh exception unit
stated otherwise)
Brief photocatalyst preparation
method
CO
2 photoreduction evaluation
details
Refs.
7
Pt-CdS-Cu
2 S
Pt
CO (3.02)
Site-selective growth of Pt on the
CdS tips followed by light-induced
cation exchange of CdS to Cu
2 S
Pt-CdS, 0.1 M Na
2 SO
3 as hole scavenger, 1 M Na
2 CO
3 as CO
2 source,
and 0.63 mM CuCl
2 as copper precursor; pH
¼ 11; 450 W Xe lamp was
used as the light source
[12]
8
Ru/NaTaO
3
Ru
CH
4 (51.8)
Photo-deposition of Ru on NaTaO
3
0.07 g sample was loaded in the
reactor, 3 mL H
2 O, 40 kPa CO
2 , and
40 kPa H
2 ; 300 W Xe lamp was used
as the light source
[29]
9
Ag/TiO
2
Ag
CH
4 (1.40)
Silver mirror method by using
HCHO and AgNO
3
0.1 g catalyst-4.2cm
2
, 0.4 mL H
2 O,
CO
2 and H
2 O vapor; the system was
placed in the dark for 10 h before the
light irradiation; 300 W Xe lamp was
used as the light source
[30]
10
V o (oxygen
vacancies)-rich
Pt/Ga
2 O
3
Pt
CO (105); CH
4 (4.75)
Photo-deposition of Pt on Ga
2 O
3
200 mg catalyst dispersed in 100 mL
H
2 O, closed gas circulation–evacuation reactor, 1.01 bar CO
2 ; 300 W Xe
lamp was used as the light source
[31]
11 Pd/TiO
2
Pd
CH
4 (118.54); CO
(15.45); H
2 (13.23)
average of 3 h
Na
2 PdCl
4 was mixed with TiO
2 and
reduced by glucose
0.1 g catalyst dispersed onto 0.1 g
silica wool in a miniature visual
autoclave,150w Hg lamp was used as
the light source, 2.5 MPa H
2 /
CO
2
¼ 4:1
[17]
12 Pd
7 Cu
1 alloyTiO
2
Pd
7 Cu
1 alloy
CH
4 (19.6)
Liquid phase synthesis using
K
2 PdCl
4 and CuCl
2 as precursor
5 mg catalyst mounted above a small
quartz beaker placed in a quartz tube,
0.2 Mpa CO
2 and 1 mL H
2 O, 300 W
Xe lamp was used as the light source
[18]
278
12 Roles and Properties of Cocatalysts in Semiconductor-Based Materials. . .