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Hydrogen production by photocatalytic water splitting of aqueous hydrogen iodide over Pt/alkali metal tantalates

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Abstract

Photocatalytic hydrogen production from aqueous hydrogen iodide (HI) over alkali metal tantalates loaded with Pt (Pt/ATaO3, A = Li, Na, or K) was demonstrated. Of the photocatalysts examined, Pt/KTaO3 showed the highest photocatalytic activity for HI decomposition. KTaO3, having the lowest excitation energy, absorbs the largest number of photons for use in photocatalytic reactions, and its corresponding catalyst has the highest number of reaction sites owing to the excellent dispersion of the Pt cocatalyst. These results demonstrate the possibility of developing a new solar-energy-based water splitting process that can convert both light and thermal energy in sunlight to hydrogen energy.

Graphical abstract: Hydrogen production by photocatalytic water splitting of aqueous hydrogen iodide over Pt/alkali metal tantalates

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Publication details

The article was received on 05 Jun 2019, accepted on 06 Aug 2019 and first published on 22 Aug 2019


Article type: Paper
DOI: 10.1039/C9SE00355J
Sustainable Energy Fuels, 2019, Advance Article

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    Hydrogen production by photocatalytic water splitting of aqueous hydrogen iodide over Pt/alkali metal tantalates

    H. Hagiwara, I. Nozawa, K. Hayakawa and T. Ishihara, Sustainable Energy Fuels, 2019, Advance Article , DOI: 10.1039/C9SE00355J

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