Site-Selective Deposition of a Cobalt Cocatalyst onto a Plasmonic Au/TiO2 Photoanode for Improved Water Oxidation
Site-Selective Deposition of a Cobalt Cocatalyst onto a Plasmonic Au/TiO2 Photoanode for Improved Water Oxidation
复制标题
DOI：
10.1021/acsaem.0c00857
复制
发表时间：
2020-06-22
影响因子：
6.4
通讯作者：
Maeda, Kazuhiko
中科院分区：
文献类型：
--
作者：
Okazaki, Megumi;Suganami, Yoshiki;Maeda, Kazuhiko
等离子体Au/Ti02薄膜是一种稳定的水氧化光阳极。在本论文中，我们发现在纳米金颗粒的边缘选择性地沉积纳米CoOx作为水氧化助剂，提高了水氧化的光电化学活性。采用光助电化学法在Au/TiO2光催化薄膜上沉积了纳米CoOx。CoOx的负载量可以通过改变沉积过程中流过的电荷量来控制，从而影响光电化学性能。在可见光下，优化的CoOx/Au/TiO2光催化薄膜产生了稳定的光阳极电流，比Au/TiO2光催化薄膜的光阳极电流提高了近3倍。
Plasmonic Au/TiO2 thin film works as a stable water oxidation photoanode. Here we show that site-selective deposition of nanosized CoOx as a water oxidation cocatalyst at the edge of Au nanoparticles on the TiO2 film improves the photoelectrochemical water oxidation activity. The nanosized CoOx was deposited by a photoassisted electrochemical method onto the Au/TiO2 thin film. The CoOx loading amount was controllable by changing the amount of electric charge that flowed during the deposition, which influenced the photoelectrochemical performance. Under visible light, the optimized CoOx/Au/TiO2 thin film generated stable photoanodic current, which was similar to 3 times higher than that obtained using Au/TiO2.