Spark Plasma Sintering Treatment for Introduction of Oxygen Vacancy in Pt Dispersed SrTiO3 for Increasing Photocatalytic Water Splitting Activity

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Abstract

Spark plasma sintering (SPS) treatment was studied for Pt dispersed SrTiO3 as photocatalytic water splitting catalyst. The oxygen vacancy was introduced by SPS treatment and it was found that H2 formation rate was increased by SPS treatment since large amount of oxygen vacancy was introduced. H2 formation rate became the highest (6.15 mmol h−1 g−1) at 2.5 wt% Pt dispersed on SrTiO3 and this H2 formation rate was almost double of Pt loaded SrTiO3 and O2 formation rate was also much increased (5.66 mmol h−1 g−1). ESR measurement suggests that amount of Ti3+ was intense after SPS treatment with 2.5 wt% Pt. Therefore, it seems that the oxygen vacancy introduced by SPS treatment effectively worked for charge separation and photocatalytic activity of SrTiO3 to water splitting was increased.

Original languageEnglish
Pages (from-to)6270-6274
Number of pages5
JournalChemCatChem
Volume11
Issue number24
DOIs
Publication statusPublished - Dec 18 2019

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water splitting
Spark plasma sintering
Oxygen vacancies
sparks
sintering
Water
oxygen
polarization (charge separation)
Paramagnetic resonance
strontium titanium oxide
catalysts
Catalysts

All Science Journal Classification (ASJC) codes

  • Catalysis
  • Physical and Theoretical Chemistry
  • Organic Chemistry
  • Inorganic Chemistry

Cite this

@article{492ea39c999d44ab9af1756faba01bb4,
title = "Spark Plasma Sintering Treatment for Introduction of Oxygen Vacancy in Pt Dispersed SrTiO3 for Increasing Photocatalytic Water Splitting Activity",
abstract = "Spark plasma sintering (SPS) treatment was studied for Pt dispersed SrTiO3 as photocatalytic water splitting catalyst. The oxygen vacancy was introduced by SPS treatment and it was found that H2 formation rate was increased by SPS treatment since large amount of oxygen vacancy was introduced. H2 formation rate became the highest (6.15 mmol h−1 g−1) at 2.5 wt{\%} Pt dispersed on SrTiO3 and this H2 formation rate was almost double of Pt loaded SrTiO3 and O2 formation rate was also much increased (5.66 mmol h−1 g−1). ESR measurement suggests that amount of Ti3+ was intense after SPS treatment with 2.5 wt{\%} Pt. Therefore, it seems that the oxygen vacancy introduced by SPS treatment effectively worked for charge separation and photocatalytic activity of SrTiO3 to water splitting was increased.",
author = "Yoonyoung Kim and Motonori Watanabe and Atsushi Takagaki and Junko Matsuda and Tatsumi Ishihara",
year = "2019",
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T1 - Spark Plasma Sintering Treatment for Introduction of Oxygen Vacancy in Pt Dispersed SrTiO3 for Increasing Photocatalytic Water Splitting Activity

AU - Kim, Yoonyoung

AU - Watanabe, Motonori

AU - Takagaki, Atsushi

AU - Matsuda, Junko

AU - Ishihara, Tatsumi

PY - 2019/12/18

Y1 - 2019/12/18

N2 - Spark plasma sintering (SPS) treatment was studied for Pt dispersed SrTiO3 as photocatalytic water splitting catalyst. The oxygen vacancy was introduced by SPS treatment and it was found that H2 formation rate was increased by SPS treatment since large amount of oxygen vacancy was introduced. H2 formation rate became the highest (6.15 mmol h−1 g−1) at 2.5 wt% Pt dispersed on SrTiO3 and this H2 formation rate was almost double of Pt loaded SrTiO3 and O2 formation rate was also much increased (5.66 mmol h−1 g−1). ESR measurement suggests that amount of Ti3+ was intense after SPS treatment with 2.5 wt% Pt. Therefore, it seems that the oxygen vacancy introduced by SPS treatment effectively worked for charge separation and photocatalytic activity of SrTiO3 to water splitting was increased.

AB - Spark plasma sintering (SPS) treatment was studied for Pt dispersed SrTiO3 as photocatalytic water splitting catalyst. The oxygen vacancy was introduced by SPS treatment and it was found that H2 formation rate was increased by SPS treatment since large amount of oxygen vacancy was introduced. H2 formation rate became the highest (6.15 mmol h−1 g−1) at 2.5 wt% Pt dispersed on SrTiO3 and this H2 formation rate was almost double of Pt loaded SrTiO3 and O2 formation rate was also much increased (5.66 mmol h−1 g−1). ESR measurement suggests that amount of Ti3+ was intense after SPS treatment with 2.5 wt% Pt. Therefore, it seems that the oxygen vacancy introduced by SPS treatment effectively worked for charge separation and photocatalytic activity of SrTiO3 to water splitting was increased.

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