Unraveling the solar and visible light-induced deactivation mechanism of Pt-decorated carbon/TiO2 nanocomposite in photocatalytic hydrogen production

Hristina Šalipur, Dragan Manojlović, Ksenija Milošević, Maciej Fronczak, Ana G. Silva, Davor Lončarević, Jasmina Dostanić

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

Photocatalytic water splitting presents an attractive and environmentally friendly method for generation of “green” hydrogen. However, the most widely used photocatalyst for hydrogen production, Pt-doped TiO2, has low stability, thus limiting its application for long term performance. In this study, the deactivation mechanism of Pt-decorated carbon TiO2 nanocomposite photocatalysts during photocatalytic hydrogen production was thoroughly investigated under solar and visible light irradiation. Solar light irradiation promoted markedly higher H2 production activity, however with lower catalyst stability. Deactivation studies using fresh catalysts/deactivated solutions and deactivated catalysts/fresh solutions point out the effect of the light used on the catalyst stability through changes on the catalyst surface as well as by the kinetics of intermediate/products formation during the reaction course. The present study revealed the importance of charge transport direction between TiO2, carbon and Pt on catalyst activity and stability and highlights the difference in visible and solar light-induced hydrogen production.
Original languageEnglish
Article number112862
Number of pages11
JournalJournal of Environmental Chemical Engineering
Volume12
Issue number3
DOIs
Publication statusPublished - Jun 2024

Keywords

  • Carbon
  • Charge transfer
  • Deactivation mechanism
  • Hydrogen
  • Photocatalysis
  • TiO

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