Observation of plasmon boosted photoelectrochemical activities on single Au/Cu2O nanoelectrode
Observation of plasmon boosted photoelectrochemical activities on single Au/Cu2O nanoelectrode
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单个 Au/Cu2O 纳米电极上等离激元增强光电化学活性的观察
DOI：
10.1088/1361-6463/ab6e9f
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发表时间：
2020
期刊：
影响因子：
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通讯作者：
Li Yongxin
中科院分区：
文献类型：
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作者：
Qian Yuanyuan;Liu Jun;Zhang Bo-tao;Huang Yanbin;Cao Dawei;Ren Kuankuan;Tang Haoran;Sun Yang;Li Qicong;Yang Cheng;Qu Shengchun;Wang Zhijie;Li Yongxin
等离子体激元相关的光电化学反应在金属纳米结构上的大规模应用已被广泛报道。然而，关于单个纳米结构的详细信息却鲜有报道。在此，我们构建了基于单根Au/Cu 2 O纳米线的纳米电极，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。即使在如此低的维度下，我们仍然可以观察到明显的纳安量级的光电流。外量子产额谱和光电流与光强的指数曲线证实了等离子体在Au纳米线中的贡献。重要的是，在减水过程中也观察到了H2气泡。因此，在纳米尺度上的PEC反应的见解已经提供。
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.