Suspended Pt nanoparticles over TiO2 nanotubes for enhanced photocatalytic H2 evolution

TL;DR

This paper presents a novel method to enhance photocatalytic hydrogen production by decorating TiO2 nanotubes with suspended Pt nanoparticles, resulting in significantly improved efficiency over traditional methods.

Contribution

Introduces a new technique for decorating TiO2 nanotubes with Pt nanoparticles via nanofibril decoration and thermal dewetting, leading to enhanced photocatalytic H2 evolution.

Findings

Enhanced photocatalytic H2 evolution efficiency compared to conventional methods.

Pt nanoparticles of 3-6 nm size effectively formed along nanofibrils.

The structure improves charge separation and catalytic activity.

Abstract

In the present work we introduce a technique to form a photocatalyst, based on Pt nanoparticles suspended over the mouth of TiO2 nanotubes. These structures are obtained by the decoration of the top end of highly ordered TiO2 nanotubes with a web of TiO2 nanofibrils, followed by sputter deposition of a minimum amount of Pt. A subsequent thermal dewetting step forms 3-6 nm-sized Pt nanoparticles along the nanofibrils. These structures, when compared to conventional Pt decoration techniques of TiO2 nanotubes, show a strongly enhanced photocatalytic H2 evolution efficiency.