Abstract:
We demonstrate how the morphology of a simple metal-oxide system (e.g., Cu2O) controls catalytic activity. Cu2O catalysts were synthesized with a highly uniform nanocube and nano-octahedra morphology under PVP surfactant-assisted reaction conditions. A series of structural, morphological, optical and electrical characterizations are done to optimize the growth of nanostructures with different morphologies. Finally, the nanostructures are exploited as photo- and electrocatalysts. Interestingly, we find dissimilitude behaviour of nano-octahedra and nano-cube samples towards photo and electrocatalytic activities. The nano-octahedra samples are approximate to 57% more photocatalytically active (half-life time(octahedra) approximate to 10.7 minutes) than the nanocube samples, which is one of the highest reported photocatalytic efficiencies reported to date. However, the same nano-octahedra samples show lower electrocatalytic activity towards oxygen reduction reaction (ORR) as compared with the nanocube sample.