工程 Ba2O6双矿与La3+用于高电流密度可见光光电化学水素进化
Tirong Guo1, Wen Tian Fu1, Huub J M de Groot1
1Leiden Institute of Chemistry, Leiden University, Einsteinweg 55, Leiden, 2300 RA, Netherlands.
Small (Weinheim an der Bergstrasse, Germany)
|February 3, 2024
概括
在Ba2Bi2O6双矿中使用兰离子兴奋剂可以提高光电化学性能. 优化的薄膜光电极显示了改善的光电流密度,用于太阳能和水的转换.
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:
- 双矿材料对光电化学应用具有前景.
- 修改材料特性是提高太阳能-水转换效率的关键.
研究的目的:
- 为了研究兰 (La3+) 离子合并对Ba2Bi2O6双矿光电极的影响.
- 优化光电极厚度和兴奋剂策略,以提高光电化学 (PEC) 性能.
主要方法:
- 通过兰离子兴奋剂合成Ba2La0.4Bi1.6O6双矿.
- 使用X射线衍射 (XRD) 和紫外线光谱学进行表征.
- 制造和测试不同厚度 (微米以下到中厚) 的光电极.
主要成果:
- 成功合成了晶体Ba2La0.4Bi1.6O6的带隙为1.57 eV.
- 亚微米薄膜光电极表现出强大的p型导电性和0.88 mA cm-2.2的光电流密度.
- 中厚光电极 (125.8197μm) 显示了1.5 mA cm-2.2的增强光电流密度.
- 厚颗粒光电极遭受电荷重组,减少PEC活动.
结论:
- 在Ba2Bi2O6中的Bi(III) 位点进行兰兴奋剂是一种提高光电极性能的有效策略.
- 优化的薄膜架构对于最大化光流和最小化重组至关重要.
- 这种方法为开发新型光阴极材料开辟了道路,用于高效的太阳能-水分离.
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