In situ photoacoustic analysis of near-infrared absorption of rhodium-doped strontium titanate photocatalyst powder

Near-infrared absorption of strontium titanate (SrTiO 3 ) doped with rhodium (Rh) was investigated by photoacoustic (PA) Fourier transform infrared spectroscopy. In the absence of an electron acceptor and the presence of a hole scavenger, the largest absorption change in the Rh valence state from te...

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Bibliographic Details
Published inChemical communications (Cambridge, England) Vol. 56; no. 91; pp. 14255 - 14258
Main Authors Shinoda, Tatsuki, Yamaguchi, Yuichi, Kudo, Akihiko, Murakami, Naoya
Format Journal Article
LanguageEnglish
Published Cambridge Royal Society of Chemistry 25.11.2020
Subjects
absorption
Fourier transform infrared spectroscopy
Fourier transforms
Hydrogen evolution
hydrogen production
Infrared absorption
Infrared analysis
Infrared radiation
Near infrared radiation
photocatalysts
Rhodium
Strontium
Strontium titanates
Valence
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ISSN1359-7345
1364-548X
1364-548X
DOI10.1039/D0CC06414A

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Summary:Near-infrared absorption of strontium titanate (SrTiO 3 ) doped with rhodium (Rh) was investigated by photoacoustic (PA) Fourier transform infrared spectroscopy. In the absence of an electron acceptor and the presence of a hole scavenger, the largest absorption change in the Rh valence state from tetravalent to trivalent was observed in Rh-doped SrTiO 3 prepared at 1473 K, which showed the highest activity for hydrogen evolution. PA measurements revealed the effective redox cycle mechanism between tetravalent and trivalent Rh ions in Rh-doped SrTiO 3 .
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ISSN:1359-7345
1364-548X
1364-548X
DOI:10.1039/D0CC06414A