Bottom-up and top-down methods to improve catalytic reactivity for photocatalytic production of hydrogen peroxide using a Ru-complex and water oxidation catalystsElectronic supplementary information (ESI) available: Experimental section, time courses of H2O2 production under different conditions (Fig. S1, S2, S14-S17), TEM images (Fig. S3, S5 and S13), X-ray photoelectron spectra of Ir(OH)3 (Fig. S4), time course of H2O2 decomposition in the presence of NiFe2O4 (Fig. S6), DLS data (Fig. S7-S10),
Hydrogen peroxide (H 2 O 2 ) was produced from water and dioxygen using [Ru II (Me 2 phen) 3 ] 2+ (Me 2 phen = 4,7-dimethyl-1,10-phenanthroline) as a photocatalyst and [Ir(Cp*)(H 2 O) 3 ] 2+ (Cp* = η 5 -pentamethylcyclopentadienyl) as a precursor of a water oxidation catalyst in the presence of Sc 3...
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| Main Authors | , , , , , |
|---|---|
| Format | Journal Article |
| Language | English |
| Published |
02.06.2015
|
| Online Access | Get full text |
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| Abstract | Hydrogen peroxide (H
2
O
2
) was produced from water and dioxygen using [Ru
II
(Me
2
phen)
3
]
2+
(Me
2
phen = 4,7-dimethyl-1,10-phenanthroline) as a photocatalyst and [Ir(Cp*)(H
2
O)
3
]
2+
(Cp* = η
5
-pentamethylcyclopentadienyl) as a precursor of a water oxidation catalyst in the presence of Sc
3+
in water under visible light irradiation. TEM and XPS measurements of residues in the resulting solution after the photocatalytic production of H
2
O
2
indicated that [Ir(Cp*)(H
2
O)
3
]
2+
was converted to Ir(OH)
3
nanoparticles, which are actual catalytic species. The Ir(OH)
3
nanoparticles produced
in situ
during the photocatalytic production of H
2
O
2
were smaller in size than those prepared independently from hydrogen hexachloroiridiate (H
2
IrCl
6
), and exhibited higher catalytic reactivity for the photocatalytic production of H
2
O
2
. The photocatalytic production of H
2
O
2
from water and dioxygen was also made possible when Ir(OH)
3
nanoparticles were replaced by nickel ferrite (NiFe
2
O
4
) nanoparticles, which are composed of more earth abundant metals than iridium. The size of NiFe
2
O
4
nanoparticles became smaller during the photocatalytic production of H
2
O
2
to exhibit higher catalytic reactivity in the second run as compared with that in the first run. NiFe
2
O
4
nanoparticles obtained by the treatment of NiFe
2
O
4
in an aqueous solution of Sc
3+
exhibited 33-times higher catalytic reactivity in H
2
O
2
-production rates than the as-prepared NiFe
2
O
4
. Thus, both the bottom-up method starting from a molecular complex [Ir(Cp*)(H
2
O)
3
]
2+
and the top-down method starting from as-prepared NiFe
2
O
4
to obtain nanoparticles with smaller size resulted in the improvement of the catalytic reactivity for the photocatalytic production of H
2
O
2
from water and dioxygen.
Hydrogen peroxide (H
2
O
2
) was produced from water and dioxygen using a Ru-complex photocatalyst and water oxidation catalysts of metal-containing nanoparticles produced
in situ
under visible light irradiation. |
|---|---|
| AbstractList | Hydrogen peroxide (H
2
O
2
) was produced from water and dioxygen using [Ru
II
(Me
2
phen)
3
]
2+
(Me
2
phen = 4,7-dimethyl-1,10-phenanthroline) as a photocatalyst and [Ir(Cp*)(H
2
O)
3
]
2+
(Cp* = η
5
-pentamethylcyclopentadienyl) as a precursor of a water oxidation catalyst in the presence of Sc
3+
in water under visible light irradiation. TEM and XPS measurements of residues in the resulting solution after the photocatalytic production of H
2
O
2
indicated that [Ir(Cp*)(H
2
O)
3
]
2+
was converted to Ir(OH)
3
nanoparticles, which are actual catalytic species. The Ir(OH)
3
nanoparticles produced
in situ
during the photocatalytic production of H
2
O
2
were smaller in size than those prepared independently from hydrogen hexachloroiridiate (H
2
IrCl
6
), and exhibited higher catalytic reactivity for the photocatalytic production of H
2
O
2
. The photocatalytic production of H
2
O
2
from water and dioxygen was also made possible when Ir(OH)
3
nanoparticles were replaced by nickel ferrite (NiFe
2
O
4
) nanoparticles, which are composed of more earth abundant metals than iridium. The size of NiFe
2
O
4
nanoparticles became smaller during the photocatalytic production of H
2
O
2
to exhibit higher catalytic reactivity in the second run as compared with that in the first run. NiFe
2
O
4
nanoparticles obtained by the treatment of NiFe
2
O
4
in an aqueous solution of Sc
3+
exhibited 33-times higher catalytic reactivity in H
2
O
2
-production rates than the as-prepared NiFe
2
O
4
. Thus, both the bottom-up method starting from a molecular complex [Ir(Cp*)(H
2
O)
3
]
2+
and the top-down method starting from as-prepared NiFe
2
O
4
to obtain nanoparticles with smaller size resulted in the improvement of the catalytic reactivity for the photocatalytic production of H
2
O
2
from water and dioxygen.
Hydrogen peroxide (H
2
O
2
) was produced from water and dioxygen using a Ru-complex photocatalyst and water oxidation catalysts of metal-containing nanoparticles produced
in situ
under visible light irradiation. |
| Author | Kato, Satoshi Hong, Dachao Isaka, Yusuke Fukuzumi, Shunichi Yamada, Yusuke Suenobu, Tomoyoshi |
| AuthorAffiliation | Ewha Womans University Department of Bioinspired Science Japan Science and Technology Agency (JST) SENTAN ALCA Department of Material and Life Science Meijo University Osaka University Faculty of Science and Engineering Graduate School of Engineering |
| AuthorAffiliation_xml | – name: Japan Science and Technology Agency (JST) – name: Graduate School of Engineering – name: Faculty of Science and Engineering – name: Department of Bioinspired Science – name: Osaka University – name: SENTAN – name: Meijo University – name: ALCA – name: Department of Material and Life Science – name: Ewha Womans University |
| Author_xml | – sequence: 1 givenname: Yusuke surname: Isaka fullname: Isaka, Yusuke – sequence: 2 givenname: Satoshi surname: Kato fullname: Kato, Satoshi – sequence: 3 givenname: Dachao surname: Hong fullname: Hong, Dachao – sequence: 4 givenname: Tomoyoshi surname: Suenobu fullname: Suenobu, Tomoyoshi – sequence: 5 givenname: Yusuke surname: Yamada fullname: Yamada, Yusuke – sequence: 6 givenname: Shunichi surname: Fukuzumi fullname: Fukuzumi, Shunichi |
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| ContentType | Journal Article |
| DOI | 10.1039/c5ta02446c |
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| Notes | decomposition in the presence of NiFe 2 3 10.1039/c5ta02446c 4 (Fig. S4), time course of H Electronic supplementary information (ESI) available: Experimental section, time courses of H (Fig. S6), DLS data (Fig. S7-S10), powder XRD patterns (Fig. S11), UV-Vis spectra (Fig. S12) and appendix for the derivation of specific surface area of particles. See DOI O production under different conditions (Fig. S1, S2, S14-S17), TEM images (Fig. S3, S5 and S13), X-ray photoelectron spectra of Ir(OH) |
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| PublicationYear | 2015 |
| References_xml | – issn: 2008 publication-title: Hydrogen as a Future Energy Carrier |
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| Snippet | Hydrogen peroxide (H
2
O
2
) was produced from water and dioxygen using [Ru
II
(Me
2
phen)
3
]
2+
(Me
2
phen = 4,7-dimethyl-1,10-phenanthroline) as a... |
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| SourceType | Enrichment Source Publisher |
| StartPage | 1244 |
| Title | Bottom-up and top-down methods to improve catalytic reactivity for photocatalytic production of hydrogen peroxide using a Ru-complex and water oxidation catalystsElectronic supplementary information (ESI) available: Experimental section, time courses of H2O2 production under different conditions (Fig. S1, S2, S14-S17), TEM images (Fig. S3, S5 and S13), X-ray photoelectron spectra of Ir(OH)3 (Fig. S4), time course of H2O2 decomposition in the presence of NiFe2O4 (Fig. S6), DLS data (Fig. S7-S10), |
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