构建CoSe2/WO3@Si多重 heterojunctions,以实现高效的光电化学水分
Li Zhang1, Kaihui Liao1, Jialu Liu2
1Key Laboratory of Fine Petrochemical Catalysis and Separation of Hunan Province, College of Chemistry and Chemical Engineering, Hunan Institute of Science and Technology, Yueyang, Hunan 414006, PR China.
Langmuir : the ACS journal of surfaces and colloids
|February 21, 2025
概括
这项研究开发了一种新的CoSe2/WO3@Si光电极,用于有效地将太阳能转化为. 这种新材料显著提高了光电流和光电化学水分裂的稳定性.
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
- 可再生能源可再生能源是可再生能源.
背景情况:
- 光电化学 (PEC) 水分是太阳能转化为能源的关键.
- 单晶光电极面临着诸如高反射率,被动化和不稳定性等挑战.
- 开发高效和稳定的光电极对于实际应用至关重要.
研究的目的:
- 在纹理上使用CoSe2和WO3设计一个多重连接结构光电极.
- 为了提高基于的光电极的效率和稳定性,用于PEC水分.
- 研究CoSe2/WO3复合材料在提高PEC性能方面的协同效应.
主要方法:
- 花CoSe2和状WO3的溶热合成.
- 化学浴室沉积CoSe2和WO3到纹理基板上.
- 制造一个具有多重连接结构的CoSe2/WO3@Si光电极.
- 在模拟太阳辐射下 (AM 1.5G) 光电极性能的表征.
主要成果:
- CoSe2/WO3@Si-9光电极在1.23 VRHE时实现了10.1 mA cm-2的光电流.
- 这种性能明显超过WO3@Si (0.49 mA cm-2) 和CoSe2@Si (1.56 mA cm-2) 光电极的性能.
- 复合光电极表现出极好的稳定性,保持性能超过10小时.
结论:
- 在CoSe2/WO3@Si复合材料中的协同效应增强了光生成的电子孔分离和氧化还原能力.
- 开发的多重 heterojunction 光电极显示了高光电流密度和稳定性.
- CoSe2/WO3@Si是高效和实用的光电化学生产的有希望的候选者.
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