Abstract
Plasmon related photoelectrochemical (PEC) reactions have been widely reported on metallic nanostructures in a large scale. However, the detailed information on single nanostructure has been rarely reported. Herein, we construct nanoelectrode based on single Au/Cu2O nanowire to unveil how surface plasma in Au nanowire impact the PEC behavior of Au/Cu2O nanoelectrode with diameter as small as 100 nm. Even in such low dimension, we could still observe obvious photocurrent in the scale of nanoamperes. The contribution of plasma in Au nanowire has been confirmed by the external quantum yield spectra and the exponential curve of photocurrent versus light intensity. Importantly, H2 bubble has also been observed in the water reduction process. Thus, insights on PEC reactions in nanoscale have been provided.
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