Characterization of photoreduced Pt/TiO                         2                          and decomposition of dichloroacetic acid over photoreduced Pt/TiO                         2                          catalysts

J. C. Yang; Y. C. Kim; Y. G. Shul; C. H. Shin; T. K. Lee

doi:10.1016/S0169-4332(97)00359-0

Characterization of photoreduced Pt/TiO ₂ and decomposition of dichloroacetic acid over photoreduced Pt/TiO ₂ catalysts

J. C. Yang, Y. C. Kim, Y. G. Shul, C. H. Shin, T. K. Lee

Department of Chemical and Biomolecular Engineering

Research output: Contribution to journal › Article › peer-review

83 Citations (Scopus)

Abstract

The effect of photoreduction on the properties of Pt/TiO ₂ catalysts was investigated. A decrease of the white-line area in the XANES spectra of Pt/TiO ₂ catalysts at the Pt L _III edge was observed with increasing photoreduction time, which denoted the photoreduction of Pt/TiO ₂ with UV illumination. From the EXAFS fitting results, the growth of Pt particles with the photoreduction time could be monitored. The XPS spectra of Pt/TiO ₂ catalysts at the Pt4f _5/2 and Pt4f _7/2 bands showed the presence of Pt ⁰ and Pt ²⁺ states after photoreduction and the fraction of metallic Pt ⁰ was increased with increasing photoreduction time. The optimum photoreduction time for DCA (dichloroacetic acid) decomposition was 6 h. The partially reduced state of Pt seems to be effective to obtain a high quantum yield in DCA decomposition with minimizing the agglomeration of Pt clusters on the TiO ₂ surface.

Original language	English
Pages (from-to)	525-529
Number of pages	5
Journal	Applied Surface Science
Volume	121-122
DOIs	https://doi.org/10.1016/S0169-4332(97)00359-0
Publication status	Published - 1997 Nov

All Science Journal Classification (ASJC) codes

Chemistry(all)
Condensed Matter Physics
Physics and Astronomy(all)
Surfaces and Interfaces
Surfaces, Coatings and Films

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10.1016/S0169-4332(97)00359-0

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Yang, J. C., Kim, Y. C., Shul, Y. G., Shin, C. H., & Lee, T. K. (1997). Characterization of photoreduced Pt/TiO ₂ and decomposition of dichloroacetic acid over photoreduced Pt/TiO ₂ catalysts Applied Surface Science, 121-122, 525-529. https://doi.org/10.1016/S0169-4332(97)00359-0

Yang, J. C. ; Kim, Y. C. ; Shul, Y. G. et al. / Characterization of photoreduced Pt/TiO ₂ and decomposition of dichloroacetic acid over photoreduced Pt/TiO ₂ catalysts In: Applied Surface Science. 1997 ; Vol. 121-122. pp. 525-529.

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title = " Characterization of photoreduced Pt/TiO 2 and decomposition of dichloroacetic acid over photoreduced Pt/TiO 2 catalysts ",

abstract = " The effect of photoreduction on the properties of Pt/TiO 2 catalysts was investigated. A decrease of the white-line area in the XANES spectra of Pt/TiO 2 catalysts at the Pt L III edge was observed with increasing photoreduction time, which denoted the photoreduction of Pt/TiO 2 with UV illumination. From the EXAFS fitting results, the growth of Pt particles with the photoreduction time could be monitored. The XPS spectra of Pt/TiO 2 catalysts at the Pt4f 5/2 and Pt4f 7/2 bands showed the presence of Pt 0 and Pt 2+ states after photoreduction and the fraction of metallic Pt 0 was increased with increasing photoreduction time. The optimum photoreduction time for DCA (dichloroacetic acid) decomposition was 6 h. The partially reduced state of Pt seems to be effective to obtain a high quantum yield in DCA decomposition with minimizing the agglomeration of Pt clusters on the TiO 2 surface.",

author = "Yang, {J. C.} and Kim, {Y. C.} and Shul, {Y. G.} and Shin, {C. H.} and Lee, {T. K.}",

year = "1997",

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doi = "10.1016/S0169-4332(97)00359-0",

language = "English",

volume = "121-122",

pages = "525--529",

journal = "Applied Surface Science",

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Yang, JC, Kim, YC, Shul, YG, Shin, CH & Lee, TK 1997, ' Characterization of photoreduced Pt/TiO ₂ and decomposition of dichloroacetic acid over photoreduced Pt/TiO ₂ catalysts ', Applied Surface Science, vol. 121-122, pp. 525-529. https://doi.org/10.1016/S0169-4332(97)00359-0

Characterization of photoreduced Pt/TiO ₂ and decomposition of dichloroacetic acid over photoreduced Pt/TiO ₂ catalysts . / Yang, J. C.; Kim, Y. C.; Shul, Y. G. et al.
In: Applied Surface Science, Vol. 121-122, 11.1997, p. 525-529.

Research output: Contribution to journal › Article › peer-review

TY - JOUR

T1 - Characterization of photoreduced Pt/TiO 2 and decomposition of dichloroacetic acid over photoreduced Pt/TiO 2 catalysts

AU - Yang, J. C.

AU - Kim, Y. C.

AU - Shul, Y. G.

AU - Shin, C. H.

AU - Lee, T. K.

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N2 - The effect of photoreduction on the properties of Pt/TiO 2 catalysts was investigated. A decrease of the white-line area in the XANES spectra of Pt/TiO 2 catalysts at the Pt L III edge was observed with increasing photoreduction time, which denoted the photoreduction of Pt/TiO 2 with UV illumination. From the EXAFS fitting results, the growth of Pt particles with the photoreduction time could be monitored. The XPS spectra of Pt/TiO 2 catalysts at the Pt4f 5/2 and Pt4f 7/2 bands showed the presence of Pt 0 and Pt 2+ states after photoreduction and the fraction of metallic Pt 0 was increased with increasing photoreduction time. The optimum photoreduction time for DCA (dichloroacetic acid) decomposition was 6 h. The partially reduced state of Pt seems to be effective to obtain a high quantum yield in DCA decomposition with minimizing the agglomeration of Pt clusters on the TiO 2 surface.

AB - The effect of photoreduction on the properties of Pt/TiO 2 catalysts was investigated. A decrease of the white-line area in the XANES spectra of Pt/TiO 2 catalysts at the Pt L III edge was observed with increasing photoreduction time, which denoted the photoreduction of Pt/TiO 2 with UV illumination. From the EXAFS fitting results, the growth of Pt particles with the photoreduction time could be monitored. The XPS spectra of Pt/TiO 2 catalysts at the Pt4f 5/2 and Pt4f 7/2 bands showed the presence of Pt 0 and Pt 2+ states after photoreduction and the fraction of metallic Pt 0 was increased with increasing photoreduction time. The optimum photoreduction time for DCA (dichloroacetic acid) decomposition was 6 h. The partially reduced state of Pt seems to be effective to obtain a high quantum yield in DCA decomposition with minimizing the agglomeration of Pt clusters on the TiO 2 surface.

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Yang JC, Kim YC, Shul YG, Shin CH, Lee TK. Characterization of photoreduced Pt/TiO ₂ and decomposition of dichloroacetic acid over photoreduced Pt/TiO ₂ catalysts Applied Surface Science. 1997 Nov;121-122:525-529. doi: 10.1016/S0169-4332(97)00359-0

Characterization of photoreduced Pt/TiO ₂ and decomposition of dichloroacetic acid over photoreduced Pt/TiO ₂ catalysts

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