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/Cu 2 O nanowire to unveil how surface plasma in Au nanowire impact the PEC behavior of Au/Cu 2 O 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, H 2 bubble has also been observed in the water reduction process. Thus, insights on PEC reactions in nanoscale have been provided.

中文翻译：

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单/ Au / Cu 2 O纳米电极上等离子体激元增强光电化学活性的观察

等离子体相关的光电化学（PEC）反应已被大规模报道在金属纳米结构上。然而，关于单个纳米结构的详细信息很少被报道。本文中，我们基于单根Au / Cu 2 O纳米线构建纳米电极，以揭示Au纳米线中的表面等离子体如何影响直径小至100 nm的Au / Cu 2 O纳米电极的PEC行为。即使在如此低的尺寸下，我们仍可以观察到纳安级的明显光电流。等离子体在金纳米线中的贡献已通过外部量子产率谱以及光电流与光强度的指数曲线得到证实。重要的是，在减水过程中也观察到了H 2气泡。因此，已经提供了关于纳米级PEC反应的见解。