Abstract
Lanthanoid oxide modifier layers were applied to Rh metal nanoparticles on (Ga1-xZnx)(N1-xOx) photocatalyst for overall water splitting under visible-light irradiation. Structural analysis by transmission electron microscopy, energy-dispersive X-ray spectroscopy, X-ray photoelectron spectroscopy, and X-ray absorption spectroscopy revealed that lanthanoid(III) oxide layers coated the Rh nanoparticles on (Ga 1-xZnx)(N1-xOx), although they were also deposited directly on the (Ga1-xZnx)(N 1-xOx) surface. Certain lanthanoid oxide layers (La, Pr, Sm, Gd, and Dy) functioned as modifiers for Rh-metal/(Ga1-xZn x)(N1-xOx) to produce H2 and O 2 gases, although the Rh-metal/(Ga1-xZn x)(N1-xOx) photocatalyst exhibited little activity for overall water splitting due to rapid water formation from H 2 and O2 on Rh. Ce and Eu oxide layers showed no photocatalytic activity, most likely due to their ability to capture photoexcited electrons from Rh-metal/(Ga1-xZnx)(N 1-xOx). The enhancement of photocatalytic activity by lanthanoid oxide loading was shown to be dependent on the formation of redox-inactive lanthanoid(III) oxide layers on the Rh nanoparticles, which effectively suppresses the backward water formation reaction to enable H 2 evolution on Rh.
| Original language | English |
|---|---|
| Pages (from-to) | 14000-14006 |
| Number of pages | 7 |
| Journal | Journal of Physical Chemistry C |
| Volume | 117 |
| Issue number | 27 |
| DOIs | |
| Publication status | Published - 2013 Jul 11 |
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ASJC Scopus subject areas
- Physical and Theoretical Chemistry
- Electronic, Optical and Magnetic Materials
- Surfaces, Coatings and Films
- Energy(all)
Cite this
Lanthanoid oxide layers on rhodium-loaded (Ga1-xZn x)(N1-xOx) photocatalyst as a modifier for overall water splitting under visible-light irradiation. / Yoshida, Masaaki; Maeda, Kazuhiko; Lu, Daling; Kubota, Jun; Domen, Kazunari.
In: Journal of Physical Chemistry C, Vol. 117, No. 27, 11.07.2013, p. 14000-14006.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Lanthanoid oxide layers on rhodium-loaded (Ga1-xZn x)(N1-xOx) photocatalyst as a modifier for overall water splitting under visible-light irradiation
AU - Yoshida, Masaaki
AU - Maeda, Kazuhiko
AU - Lu, Daling
AU - Kubota, Jun
AU - Domen, Kazunari
PY - 2013/7/11
Y1 - 2013/7/11
N2 - Lanthanoid oxide modifier layers were applied to Rh metal nanoparticles on (Ga1-xZnx)(N1-xOx) photocatalyst for overall water splitting under visible-light irradiation. Structural analysis by transmission electron microscopy, energy-dispersive X-ray spectroscopy, X-ray photoelectron spectroscopy, and X-ray absorption spectroscopy revealed that lanthanoid(III) oxide layers coated the Rh nanoparticles on (Ga 1-xZnx)(N1-xOx), although they were also deposited directly on the (Ga1-xZnx)(N 1-xOx) surface. Certain lanthanoid oxide layers (La, Pr, Sm, Gd, and Dy) functioned as modifiers for Rh-metal/(Ga1-xZn x)(N1-xOx) to produce H2 and O 2 gases, although the Rh-metal/(Ga1-xZn x)(N1-xOx) photocatalyst exhibited little activity for overall water splitting due to rapid water formation from H 2 and O2 on Rh. Ce and Eu oxide layers showed no photocatalytic activity, most likely due to their ability to capture photoexcited electrons from Rh-metal/(Ga1-xZnx)(N 1-xOx). The enhancement of photocatalytic activity by lanthanoid oxide loading was shown to be dependent on the formation of redox-inactive lanthanoid(III) oxide layers on the Rh nanoparticles, which effectively suppresses the backward water formation reaction to enable H 2 evolution on Rh.
AB - Lanthanoid oxide modifier layers were applied to Rh metal nanoparticles on (Ga1-xZnx)(N1-xOx) photocatalyst for overall water splitting under visible-light irradiation. Structural analysis by transmission electron microscopy, energy-dispersive X-ray spectroscopy, X-ray photoelectron spectroscopy, and X-ray absorption spectroscopy revealed that lanthanoid(III) oxide layers coated the Rh nanoparticles on (Ga 1-xZnx)(N1-xOx), although they were also deposited directly on the (Ga1-xZnx)(N 1-xOx) surface. Certain lanthanoid oxide layers (La, Pr, Sm, Gd, and Dy) functioned as modifiers for Rh-metal/(Ga1-xZn x)(N1-xOx) to produce H2 and O 2 gases, although the Rh-metal/(Ga1-xZn x)(N1-xOx) photocatalyst exhibited little activity for overall water splitting due to rapid water formation from H 2 and O2 on Rh. Ce and Eu oxide layers showed no photocatalytic activity, most likely due to their ability to capture photoexcited electrons from Rh-metal/(Ga1-xZnx)(N 1-xOx). The enhancement of photocatalytic activity by lanthanoid oxide loading was shown to be dependent on the formation of redox-inactive lanthanoid(III) oxide layers on the Rh nanoparticles, which effectively suppresses the backward water formation reaction to enable H 2 evolution on Rh.
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U2 - 10.1021/jp402240d
DO - 10.1021/jp402240d
M3 - Article
AN - SCOPUS:84880139811
VL - 117
SP - 14000
EP - 14006
JO - Journal of Physical Chemistry C
JF - Journal of Physical Chemistry C
SN - 1932-7447
IS - 27
ER -