表面促进的Ru-bda协调寡合体的进化提高了水氧化分子阳极的效率
Marcos Gil-Sepulcre1, Joachim O Lindner2, Dorothee Schindler3
1Institute of Chemical Research of Catalonia (ICIQ). Barcelona Institute of Science and Technology (BIST), Avenida Països Catalans 16, 43007 Tarragona, Spain.
Journal of the American Chemical Society
|July 22, 2021
概括
一种在碳纳米管上固定的新型寡合物有效催化了水的氧化. 这种强大的分子混合材料可以实现高电流密度的可持续氧气生产.
科学领域:
- 协调化学
- 材料科学
- 电化学
背景情况:
- 开发高效稳定的电催化剂用于氧化水是可持续能源技术的关键.
- 与同质系统相比,异质催化剂在分离和重复使用方面具有优势.
研究的目的:
- 合成和表征一种新的基于鲁寡合物的分子混合材料.
- 评估这种材料作为氧化水的电催化剂的性能
- 研究超分子相互作用在催化剂稳定性和活性中的作用.
主要方法:
- 使用光谱,X射线和电化学技术合成和表征寡合物{[RuII{bda-κ-N2O2}{4,4'-bpy}}10{4,4'-bpy}10 .
- 通过CH-π相互作用将寡合物固定在多壁碳纳米管 (CNT) 上,形成10@CNT混合材料.
- 作为水氧化催化剂的10@CNT的电化学评估,包括稳定性和性能测量.
主要成果:
- 合成的鲁寡合物 (10) 很容易与CNT形成稳定的杂交物质 (10@CNT).
- 10@CNT材料表现出高效的电催化活性,用于氧化水,产生分子氧.
- 在pH 7和1. 45V与NHE时,可以达到高电流密度 (200mA/ cm2),而这种长期稳定性则归因于分子上相互作用.
结论:
- 分子混合材料10@CNT是电催化氧化水的强大而坚固的阳极.
- 催化剂与石墨表面之间的超分子相互作用提高了催化剂的稳定性和性能.
- 这项研究提出了一个有前途的策略,用于设计稳定高效的异质催化剂.
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