a School of Chemistry, University of St Andrews, St Andrews, KY16 9ST, Scotland, UK. b Sasol Technology (UK) Ltd., St Andrews, KY16 9ST Scotland, UK. 210.
Electronic Supplementary Material (ESI) for Physical Chemistry Chemical Physics. This journal is © the Owner Societies 2015
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ARTICLE Electronic Supplementary Information (ESI)
The effect of Pt NPs crystallinity and distribution on the photocatalytic activity of Pt-g-C3N4 F. Fina,a H. Ménardb and J. T. S. Irvine*a a
School of Chemistry, University of St Andrews, St Andrews, KY16 9ST, Scotland, UK. b
Sasol Technology (UK) Ltd., St Andrews, KY16 9ST Scotland, UK.
a)
210
b)
Cl 2p
Intensity / arb. unit
Intensity / arb. unit
Cl 2p
204 198 Binding Energy / eV
192 210
204 198 Binding Energy / eV
192
Fig.S1 XPS Cl 2p for Pt-g-C3N4 a) impregnated and b) impregnated followed by calcination before photocatalytic test.
1 | J. Name., 2012, 00, 1-3
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ARTICLE
Journal Name
Intensity / arb. unit
PtO Pt0
85
80
75 Binding Energy / eV
70
65
Fig.S2 XPS Pt 4f region for the calcined Pt-g-C3N4 after photocatalysis.
Intensity / arb. unit
85
80
75
70
65
Pt0 PtO
20 h
Pt0 PtO
3h
Pt0 PtO
1.5 h
PtClx
0h
PtO
85
80 75 70 Binding Energy / eV
65
Fig.S3 XPS Pt 4f region of the impregnated Pt-g-C3N4 showing the evolution of the platinum peak after photocatalytic test for different lengths of time.
2 | J. Name., 2012, 00, 1-3
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ARTICLE
H2 evolution rate / molh-1g-1
5000 3750 2500 1250 0
0
12
24 Reduction length / h
36
48
Fig.S4 Steady state H2 evolution rate for impregnated Pt-g-C3N4 reduced under 5 % H2/Ar for different lengths of time (12 h, 24 h, 36 h and 48 h). Test conditions: 0.1 g of catalyst in 0.1 L of 0.05 M aqueous solution of oxalic acid, visible light (λ ≥ 420 nm).
Table S1 Platinum species relative amounts and Pt:N ratio for Pt-g-C3N4 reduced in 5 % H2/Ar for 24 h and 48 h. Reduction length (h) PtO % Pt0 % Pt:N 24 48
44.2 37.7
a
55.8 62.36
b
0.051 0.052
e
f
15
0.192
Count (%)
Count (%)
20 10
5
0.223 nm 0
c
0
2 4 6 8 10 Diameter (nm)
0.195 nm
d
10
0
g
0
2 4 6 8 10 Diameter (nm)
h 0.222 nm
0.223 nm
Fig.S5 TEM and HRTEM of Pt-g-C3N4 reduced in 5 % H2/Ar for 24 h. Inset-a) Particle size distribution.
This journal is © The Royal Society of Chemistry 2013
J. Name., 2013, 00, 1-3 | 3
ARTICLE
Journal Name a
b
c
d 20
Count (%)
15 10 5 0
0
2 4 6 8 10 Diameter (nm)
Fig.S6 TEM and HRTEM of Pt-g-C3N4 reduced with NaBH4. Inset-c) Particle size distribution.
a
b
c
d
Count (%)
15
10
5
0
0
4 8 12 16 20 Diameter (nm)
Fig.S7 TEM and HRTEM of Pt-g-C3N4 double reduced with NaBH4 and 5 % H2/Ar. Inset-c) Particle size distribution.
4 | J. Name., 2012, 00, 1-3
This journal is © The Royal Society of Chemistry 2012
