Oxidative photo-deposition of chromia: tuning the activity for overall water splitting of the Rh/CrOx co-catalyst system

Abstract

Employing an oxidative photodeposition of CrO_x the well-known Rh/CrO_x co-catalyst system was prepared on different semiconductors. These photocatalysts showed up to 25% higher overall water splitting activities compared with conventionally prepared materials. The enhancement is attributed to a favorable selective deposition of CrO_x caused by charge-directed deposition.