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

Hidehisa Hagiwara, Ittoku Nozawa, Katsuaki Hayakawa, Tatsumi Ishihara

Research output: Contribution to journalArticle

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.

Original languageEnglish
Pages (from-to)3021-3028
Number of pages8
JournalSustainable Energy and Fuels
Volume3
Issue number11
DOIs
Publication statusPublished - Jan 1 2019

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Alkali metals
Hydrogen production
Hydrogen
Water
Excitation energy
Photocatalysts
Thermal energy
Solar energy
Photons
Decomposition
Catalysts

All Science Journal Classification (ASJC) codes

  • Renewable Energy, Sustainability and the Environment
  • Fuel Technology
  • Energy Engineering and Power Technology

Cite this

Hydrogen production by photocatalytic water splitting of aqueous hydrogen iodide over Pt/alkali metal tantalates. / Hagiwara, Hidehisa; Nozawa, Ittoku; Hayakawa, Katsuaki; Ishihara, Tatsumi.

In: Sustainable Energy and Fuels, Vol. 3, No. 11, 01.01.2019, p. 3021-3028.

Research output: Contribution to journalArticle

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