Deposition of platinum on boron-doped TiO₂/Ti nanotube arrays as an efficient and stable photocatalyst for hydrogen generation from water splitting.

ABSTRACT: An efficient photocatalyst of boron-doped titanium dioxide/titanium nanotube array-supported platinum particles (Pt-B/TiO₂/Ti NTs) was fabricated for photocatalytic water splitting for hydrogen production through a two-step route. First, B/TiO₂/Ti NTs were prepared by anodic oxidation using hydrofluoric acid as electrolyte and boric acid as a B source. Then, Pt particles were deposited on the surface of B/TiO₂/Ti NTs by photo-assisted impregnation reduction. The structure and properties of Pt-B/TiO₂/Ti NTs were characterized by various physical measurements which showed the successful fabrication of Pt-B/TiO₂/Ti NTs. The Pt-B/TiO₂/Ti NTs, with a B-doping content of 15 mmol L^-1, showed the highest photocatalytic activity and exhibited a photocatalytic hydrogen-production rate of 384.9 μmol g^-1 h^-1, which was 9.2-fold higher than that of unmodified TiO₂/Ti NTs (41.7 μmol g^-1 h^-1). This excellent photocatalytic performance was ascribed mainly to the synergistic effect of Pt and B, which could enhance the photocatalytic activity of TiO₂/Ti NTs.

SUBMITTER: Sun M 

PROVIDER: S-EPMC9063345 | biostudies-literature | 2019 Apr

REPOSITORIES: biostudies-literature