Abstract
The distribution of cocatalysts on a water splitting photocatalyst was investigated using electron microscopy combined with energy dispersive X-ray spectroscopy. Pt, Cr, and Co cocatalyst components were dispersed on the surface of an Al-doped SrTiO3 photocatalyst by stepwise photodeposition. It was found that the Pt/Cr2O3 cocatalyst for hydrogen evolution and the CoOOH cocatalyst for oxygen evolution were selectively deposited on different crystal facets, indicating anisotropic charge transport.
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