[15p-S4_201-1~12] 3.14 Optics and Photonics English Session

3:15 PM - 3:30 PM JST(6:15 AM - 6:30 AM UTC)Presentation by Applicant for JSAP Young Scientists Presentation AwardEnglish Presentation

[15p-S4_201-6] Photo-Induced Hydrogen Evolution over Au/Pt-Decorated TiO₂ Nanotubes: Decisive Role of Au Nanoparticle Size

〇(M2C)MINHAJ MD HOSSAIN¹, Mukund Ekunde¹, Satoshi Sugano¹, Tetsuro Katayama¹, Pankaj Koinkar¹, Akihiro Furube¹ (1.Institute of Post LED Photonics, Tokushima University)

Keywords:

Photocatalyst,Hydrogen Evolution,plasmon

Photocatalytic water splitting is a promising and sustainable approach for hydrogen production, offering a clean alternative to fossil-fuel-based energy sources. In this study, ternary photocatalytic materials, Au/Pt-decorated TiO₂ nanotubes (Au/Pt/TiO₂-NT), were successfully synthesized via a photo-deposition method using a highly ordered TiO₂ nanotube array as the supporting architecture. Gold nanoparticles (AuNPs) with two different average sizes (~13nm and ~40nm) were selectively deposited into the TiO₂ nanotubes, followed by Pt loading as a co-catalyst to enhance hydrogen evolution activity. The resulting samples are denoted as Au13/Pt/TiO₂-NT and Au40/Pt/TiO₂-NT, respectively. Notably, the Au13/Pt/TiO₂-NT photocatalyst exhibited the highest hydrogen evolution activity under visible light. This highlights the crucial significance of Au size in enhancing TiO₂-based photocatalysts for visible-light hydrogen production, as it results from less effective interfacial charge transfer from larger AuNPs with limited TiO₂ contact.