Journal
CHEMCATCHEM
Volume 11, Issue 24, Pages 6270-6274Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cctc.201901549
Keywords
Spark Plasma Sintering 1; SrTiO3 2; Photocatalytic water splitting 3
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Funding
- Ministry of Education, Culture, Sports, Science and Technology (MEXT) of Japanese government [16H06293]
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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 H-2 formation rate was increased by SPS treatment since large amount of oxygen vacancy was introduced. H-2 formation rate became the highest (6.15 mmol h(-1) g(-1)) at 2.5 wt% Pt dispersed on SrTiO3 and this H-2 formation rate was almost double of Pt loaded SrTiO3 and O-2 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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