通过梯形类型的合聚合物光电极的直接光驱氧化
Pauline Bornoz1, Mathieu S Prévot1, Xiaoyun Yu1
1Laboratory for Molecular Engineering of Optoelectronic Nanomaterials, École Polytechnique Fédérale de Lausanne (EPFL) , Station 6, 1015 Lausanne, Switzerland.
Journal of the American Chemical Society
|November 19, 2015
概括
聚化 (BBL) 是一种稳定的合聚合物,可以作为太阳能水氧化的光电极. 纳米结构BBL薄膜实现显著的光电流,其性能受pH和形态的影响.
科学领域:
- 材料科学
- 电化学
- 光催化
背景情况:
- 稳定的合聚合物正在探索光电化学应用.
- 太阳能直接氧化水需要高效和稳定的光电极材料.
研究的目的:
- 评估聚[胺烯] (BBL) 作为直接太阳水氧化的光电极.
- 研究形态和pH对BBL光电极性能的影响.
主要方法:
- 使用分散喷雾方法制造BBL薄膜.
- 在模拟太阳照明下进行光电化学测量.
- 电化学阻抗光谱用于平带电位的测定.
主要成果:
- 纳米结构BBL薄膜在1.23VRHE时达到高达0.23mA cm−2的光电流.
- 在广泛的pH范围 (+0.31 VNHE) 中,平带电位保持不变.
- 光电流与pH增加;30分钟内没有观察到BBL氧化.
结论:
- BBL是太阳能氧化水的稳定材料,其性能取决于薄膜纳米结构和电解质pH.
- 使用TiO2和Ni-Co催化剂的接口功能化将反应转向O2进化.
- 需要进一步优化,以提高实际应用的光电效率.
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