Modification of Visible-Light-Responsive PbTiOF with Metal Oxide Cocatalysts to Improve Photocatalytic O Evolution toward Z-Scheme Overall Water Splitting.

The development of a highly active photocatalyst for visible-light water splitting requires a high-quality semiconductor material and a cocatalyst, which promote both the migration of photogenerated charge carriers and surface redox reactions. In this work, a cocatalyst was loaded onto an oxyfluoride photocatalyst, PbTiOF, to improve the water oxidation activity. Among the metal oxides examined as cocatalysts, RuO was found to be the most suitable, and the O evolution activity depended on the preparation conditions for Ru/PbTiOF.

Improvement of Visible-Light H Evolution Activity of Pb Ti O F Photocatalyst by Coloading of Rh and Pd Cocatalysts.

Pb Ti O F modified with various metal cocatalysts was studied as a photocatalyst for visible-light H evolution. Although unmodified Pb Ti O F showed negligible activity, modification of its surface with Rh led to the best observed promotional effect among the Pb Ti O F samples modified with a single metal cocatalyst. The H evolution activity was further enhanced by coloading with Pd; the Rh-Pd/Pb Ti O F photocatalyst showed 3.