可见光驱动的水分裂在一个具有前所未有的高光电流密度的分子装置中
Yan Gao1, Xin Ding, Jianhui Liu
1State Key Laboratory of Fine Chemicals, Dalian University of Technology, DUT-KTH Joint Education and Research Center on Molecular Devices, Dalian 116024, China. dr.gaoyan@dlut.edu.cn
Journal of the American Chemical Society
|March 8, 2013
概括
研究人员开发了一种新型的光电极,用于高效的太阳能分水. 这种分子催化剂和光敏感剂系统在TiO2纳米颗粒上实现了创纪录的光电流密度,推动了可持续的生产.
科学领域:
- 材料科学 材料科学 材料科学
- 电化学 电化学 电化学
- 光催化作用的光催化
背景情况:
- 有效的水分离对于可持续的燃料生产至关重要.
- 分子催化剂为水氧化提供可调节的特性.
- 将分子组件与半导体支集成,可以提高光电化学性能.
研究的目的:
- 在纳米结构TiO2.2上合成和固定分子水氧化催化剂和光敏剂.
- 为可见光驱动的水分裂构建一个光活性阳极.
- 为了评估已制造的设备的光电化学性能.
主要方法:
- 一种分子水氧化催化剂 (2) 和光敏剂 (1) 的合成.
- 在FTO玻璃上将组件 (1+2) 固定在纳米结构TiO2颗粒上.
- 用于三电极光电化学电池 (PEC) 的光电极 (TiO2(1+2)) 的制造.
- 在酸盐缓冲体 (pH 6.8) 中在可见光照射下的性能评估 (pH 6.8).
主要成果:
- 成功演示了可见光驱动的水分裂.
- 来自各自电极的氧气和气泡的演变.
- 在0.2V与NHE相比,达到高光电流密度,超过1.7mA·cm(-2) 在0.2V与NHE.
- 这种光电流密度是使用分子组件的PEC设备中报告的最高.
结论:
- 开发的光电极 (TiO2 ((1+2)) 能实现高效的太阳能水分解.
- 在纳米结构的TiO2上,分子催化剂和光敏感剂的组合是人工光合作用的一个有希望的策略.
- 这项工作为基于分子的光电化学水分装置设定了新的基准.
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