用红光进行光电催化演变的二 (II,II) /光阴极
Jie Huang1, Jiaonan Sun1, Yiying Wu1
1Department of Chemistry and Biochemistry, The Ohio State University, Columbus, Ohio 43210, United States.
Journal of the American Chemical Society
|January 11, 2021
概括
研究人员开发了一种单分子光催化剂, 这种Rh2 (II,II) 复合物在NiO上,有效吸收阳光并催化H2生成,简化了太阳能燃料技术.
科学领域:
- 材料科学
- 光催化
- 可再生能源
背景情况:
- 传统的太阳能燃料系统通常使用单独的敏感器和催化剂,导致效率低下.
- 开发结合光吸收和催化活动的综合系统对于改善太阳能转换至关重要.
研究的目的:
- 合成和描述一种用于生产的新型单分子光催化剂.
- 为了研究Rh2 (II,II) 复合物的性能,该复合物固定在一个NiO光阴极上,用于太阳能生成.
- 展示单分子方法相对于多组件系统的优势.
主要方法:
- 一个Rh2 (II,II) 模复合物的合成.
- 将复合体固定在一个NiO光阴极上.
- 在可见光照射下进行光电化学测量 (655 nm).
- 对光电流的分析,H2生产的法拉第效率和长期稳定性.
主要成果:
- 该Rh2 (II,II) - NiO光电极在紫外线可见光谱和近红外光谱 (~800 nm) 中表现出强烈的光吸收.
- 在655nm光线下,光电流密度为52μA cm−2在0.2V与Ag/AgCl之间实现.
- 在没有降解的2.5小时内观察到H2生产的高法拉达效率 (高达85±5%).
结论:
- 单分子Rh2 (II,II) 复合物在NiO上同时起作用作为光敏感剂和生产催化剂.
- 这种综合系统简化了生产路径,减少了能源损失.
- 开发的光电极代表了使用p型半导体和可见光的太阳能燃料生产的有希望的进步.
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