用于高性能双功能光电极的捐赠器-接受器结合乙聚合物
Mino Borrelli1, Yun An2,3, Christine Joy Querebillo1,4
1Department of Chemistry and Food Chemistry and Center of Advancing Electronics Dresden (cfaed), Technische Universität Dresden, Mommsenstrasse 4, 01062, Dresden, Germany.
ChemSusChem
|December 8, 2023
概括
研究人员开发了新型联乙聚合物 (CAPs),作为高效的光电极,用于氧化演变 (OER) 和演变 (HER) 反应,从而推进太阳能燃料的产生.
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:
- 由于严格的热力学要求,开发用于太阳能燃料发电的高效光电极材料具有挑战性.
- 现有的材料往往需要联合催化剂,增加复杂性和成本.
- 一种能够在太阳光下进行氧化进化 (OER) 和化进化 (HER) 的单一材料仍然难以捉摸.
研究的目的:
- 为了证明捐赠者-受体结合乙聚合物 (CAPs) 作为光电极的双重功能,作为OER和HER的光电极,没有辅助催化剂.
- 为了研究一个特定的CAP的性能,聚二四三四乙烯 (pTET) -1,3,5-triazine).
- 阐明OER和HER在这些有机材料上的反应机制.
主要方法:
- 供体-接受体结合乙聚合物 (CAPs) 的合成和表征.
- 在性和中性介质的模拟太阳光下进行光电化学测量.
- 理论研究 (例如,DFT计算).
- 电化学操作共振拉曼光谱学.
主要成果:
- 在没有辅助催化剂的情况下,CAPs,特别是pTET,表现出显著的OER和HER光电密度.
- 在1.23V与RHE (pH13) 相比,pTET实现了~200μA cm−2的OER光电流,在0.3V与RHE (pH6.8) 相比,达到~190μA cm−2的HER光电流.
- 机理学研究揭示了OER (涉及三键和环) 和HER (电子转移到三环) 的不同的途径.
结论:
- 捐赠者-接受者CAP是高效,无共催化剂的光电化学OER和HER的有望有机材料.
- pTET为双功能光电极设定了一个基准.
- 这项工作为太阳能燃料生产中的有机材料开辟了新的途径.
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