Characterization of Rh−Cr Mixed-Oxide Nanoparticles Dispersed on (Ga1-xZnx)(N1-xOx) as a Cocatalyst for Visible-Light-Driven Overall Water Splitting
- 27 June 2006
- journal article
- research article
- Published by American Chemical Society (ACS) in The Journal of Physical Chemistry B
- Vol. 110 (28), 13753-13758
- https://doi.org/10.1021/jp061829o
Abstract
The structure of Rh−Cr mixed-oxide (Rh2-yCryO3) nanoparticles dispersed on (Ga1-xZnx)(N1-xOx) is characterized by electron microscopy and X-ray spectroscopy. The Rh2-yCryO3 nanoparticle is an efficient cocatalyst for photocatalytic overall water splitting on the (Ga1-xZnx)(N1-xOx) solid solution and is loaded onto the catalyst by impregnation from an aqueous solution containing Na3RhCl6·2H2O and Cr(NO3)3·9H2O followed by calcination in air. Impregnation of the (Ga1-xZnx)(N1-xOx) with 1 wt % Rh and 1.5 wt % Cr followed by calcination at 623 K for 1 h provides the highest photocatalytic activity. Structural analyses reveal that the activity of this photocatalyst is strongly dependent on the generation of trivalent Rh−Cr mixed-oxide nanoparticles with optimal composition and distribution.Keywords
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