Title:

Self-Assembly of Cobaloxime on TiO2 Nanoparticles for Solar Driven H2 Production

Photocatalytic hydrogen evolution could be the future for green energy. Photocatalysis is an effective way to generate hydrogen gas via water splitting mechanisms. Anchoring of cobaloxime catalyst on the surface of titanium dioxide (TiO2) has been shown to improve electron transfer for photocatalysis. In this study we investigate the effects of anchoring isonicotinic acid (ISO) on TiO2 regarding the self-assembly of catalyst on the semiconductor surface. Loading amounts of ISO on TiO2 were best in the 2.5mM ISO in 10mL methanol solution stirred for 24hrs. When stirred overnight with functionalized TiO2, cobaloxime catalyst precursor catches up completely in hydrogen production to fully synthesized cobaloxime catalyst. The time and effort needed to synthesize cobaloxime catalysts can be reduced by loading TiO2 beforehand, adding catalyst precursor, and then stirring before photocatalysis to allow for self-assembly.

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