Exploring the structural and electronic properties of Pt/ceria-modified TiO 2 and its photocatalytic activity for water splitting under visible light

Shankhamala Kundu, Jim Ciston, Sanjaya D. Senanayake, Dario A. Arena, Etsuko Fujita, Dario Stacchiola, Laura Barrio, Rufino M. Navarro, Jose L G Fierro, José A. Rodriguez

Research output: Contribution to journalArticle

45 Citations (Scopus)

Abstract

In the past few years there has been intensive research focused on doping TiO 2 with other metal oxides in order to synthesize a mixed metal oxide based semiconductor with modified band gap which can split water efficiently in visible light. In this study we modified titania-anatase powders through deposition of ceria nanoparticles on them. The formation of a mixed metal oxide at the CeO x/TiO 2 interface was observed using transmission electron microscopy and near-edge X-ray absorption spectroscopy. UV-vis spectra show that this mixed metal oxide can absorb photons in the visible region due to the presence of stabilized Ce 3+ in the mixed oxide phase. The addition of 0.5 wt % Pt imposes a significant chemical change on the ceria nanoparticles by substantially enhancing the concentration of Ce 3+ and makes possible photocatalytic activity by providing an electron trap. When irradiated with visible light, 0.5 wt % Pt loaded on CeO 2-modified TiO 2 generates oxygen almost seven times more efficiently than a standard WO 3 catalyst. A correlation was found between the concentration of Ce 3+ in Pt/CeO x/ TiO 2 and its photocatalytic activity.

Original languageEnglish
Pages (from-to)14062-14070
Number of pages9
JournalJournal of Physical Chemistry C
Volume116
Issue number26
DOIs
Publication statusPublished - Jul 5 2012

Fingerprint

water splitting
Cerium compounds
mixed oxides
Electronic properties
Oxides
metal oxides
Structural properties
Metals
Water
electronics
nanoparticles
Nanoparticles
Electron traps
X ray absorption spectroscopy
anatase
absorption spectroscopy
titanium
Powders
Titanium dioxide
traps

ASJC Scopus subject areas

  • Physical and Theoretical Chemistry
  • Electronic, Optical and Magnetic Materials
  • Surfaces, Coatings and Films
  • Energy(all)

Cite this

Exploring the structural and electronic properties of Pt/ceria-modified TiO 2 and its photocatalytic activity for water splitting under visible light. / Kundu, Shankhamala; Ciston, Jim; Senanayake, Sanjaya D.; Arena, Dario A.; Fujita, Etsuko; Stacchiola, Dario; Barrio, Laura; Navarro, Rufino M.; Fierro, Jose L G; Rodriguez, José A.

In: Journal of Physical Chemistry C, Vol. 116, No. 26, 05.07.2012, p. 14062-14070.

Research output: Contribution to journalArticle

Kundu, S, Ciston, J, Senanayake, SD, Arena, DA, Fujita, E, Stacchiola, D, Barrio, L, Navarro, RM, Fierro, JLG & Rodriguez, JA 2012, 'Exploring the structural and electronic properties of Pt/ceria-modified TiO 2 and its photocatalytic activity for water splitting under visible light', Journal of Physical Chemistry C, vol. 116, no. 26, pp. 14062-14070. https://doi.org/10.1021/jp304475x
Kundu, Shankhamala ; Ciston, Jim ; Senanayake, Sanjaya D. ; Arena, Dario A. ; Fujita, Etsuko ; Stacchiola, Dario ; Barrio, Laura ; Navarro, Rufino M. ; Fierro, Jose L G ; Rodriguez, José A. / Exploring the structural and electronic properties of Pt/ceria-modified TiO 2 and its photocatalytic activity for water splitting under visible light. In: Journal of Physical Chemistry C. 2012 ; Vol. 116, No. 26. pp. 14062-14070.
@article{8d4d79859c1f4cec9e49643d57a8e9d2,
title = "Exploring the structural and electronic properties of Pt/ceria-modified TiO 2 and its photocatalytic activity for water splitting under visible light",
abstract = "In the past few years there has been intensive research focused on doping TiO 2 with other metal oxides in order to synthesize a mixed metal oxide based semiconductor with modified band gap which can split water efficiently in visible light. In this study we modified titania-anatase powders through deposition of ceria nanoparticles on them. The formation of a mixed metal oxide at the CeO x/TiO 2 interface was observed using transmission electron microscopy and near-edge X-ray absorption spectroscopy. UV-vis spectra show that this mixed metal oxide can absorb photons in the visible region due to the presence of stabilized Ce 3+ in the mixed oxide phase. The addition of 0.5 wt {\%} Pt imposes a significant chemical change on the ceria nanoparticles by substantially enhancing the concentration of Ce 3+ and makes possible photocatalytic activity by providing an electron trap. When irradiated with visible light, 0.5 wt {\%} Pt loaded on CeO 2-modified TiO 2 generates oxygen almost seven times more efficiently than a standard WO 3 catalyst. A correlation was found between the concentration of Ce 3+ in Pt/CeO x/ TiO 2 and its photocatalytic activity.",
author = "Shankhamala Kundu and Jim Ciston and Senanayake, {Sanjaya D.} and Arena, {Dario A.} and Etsuko Fujita and Dario Stacchiola and Laura Barrio and Navarro, {Rufino M.} and Fierro, {Jose L G} and Rodriguez, {Jos{\'e} A.}",
year = "2012",
month = "7",
day = "5",
doi = "10.1021/jp304475x",
language = "English",
volume = "116",
pages = "14062--14070",
journal = "Journal of Physical Chemistry C",
issn = "1932-7447",
publisher = "American Chemical Society",
number = "26",

}

TY - JOUR

T1 - Exploring the structural and electronic properties of Pt/ceria-modified TiO 2 and its photocatalytic activity for water splitting under visible light

AU - Kundu, Shankhamala

AU - Ciston, Jim

AU - Senanayake, Sanjaya D.

AU - Arena, Dario A.

AU - Fujita, Etsuko

AU - Stacchiola, Dario

AU - Barrio, Laura

AU - Navarro, Rufino M.

AU - Fierro, Jose L G

AU - Rodriguez, José A.

PY - 2012/7/5

Y1 - 2012/7/5

N2 - In the past few years there has been intensive research focused on doping TiO 2 with other metal oxides in order to synthesize a mixed metal oxide based semiconductor with modified band gap which can split water efficiently in visible light. In this study we modified titania-anatase powders through deposition of ceria nanoparticles on them. The formation of a mixed metal oxide at the CeO x/TiO 2 interface was observed using transmission electron microscopy and near-edge X-ray absorption spectroscopy. UV-vis spectra show that this mixed metal oxide can absorb photons in the visible region due to the presence of stabilized Ce 3+ in the mixed oxide phase. The addition of 0.5 wt % Pt imposes a significant chemical change on the ceria nanoparticles by substantially enhancing the concentration of Ce 3+ and makes possible photocatalytic activity by providing an electron trap. When irradiated with visible light, 0.5 wt % Pt loaded on CeO 2-modified TiO 2 generates oxygen almost seven times more efficiently than a standard WO 3 catalyst. A correlation was found between the concentration of Ce 3+ in Pt/CeO x/ TiO 2 and its photocatalytic activity.

AB - In the past few years there has been intensive research focused on doping TiO 2 with other metal oxides in order to synthesize a mixed metal oxide based semiconductor with modified band gap which can split water efficiently in visible light. In this study we modified titania-anatase powders through deposition of ceria nanoparticles on them. The formation of a mixed metal oxide at the CeO x/TiO 2 interface was observed using transmission electron microscopy and near-edge X-ray absorption spectroscopy. UV-vis spectra show that this mixed metal oxide can absorb photons in the visible region due to the presence of stabilized Ce 3+ in the mixed oxide phase. The addition of 0.5 wt % Pt imposes a significant chemical change on the ceria nanoparticles by substantially enhancing the concentration of Ce 3+ and makes possible photocatalytic activity by providing an electron trap. When irradiated with visible light, 0.5 wt % Pt loaded on CeO 2-modified TiO 2 generates oxygen almost seven times more efficiently than a standard WO 3 catalyst. A correlation was found between the concentration of Ce 3+ in Pt/CeO x/ TiO 2 and its photocatalytic activity.

UR - http://www.scopus.com/inward/record.url?scp=84863673835&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84863673835&partnerID=8YFLogxK

U2 - 10.1021/jp304475x

DO - 10.1021/jp304475x

M3 - Article

AN - SCOPUS:84863673835

VL - 116

SP - 14062

EP - 14070

JO - Journal of Physical Chemistry C

JF - Journal of Physical Chemistry C

SN - 1932-7447

IS - 26

ER -