在铁酸共价有机框架中堆叠顺序介导的旋转状态调制使得高效的氧降低反应反应成为可能
Yun Li1, Md Samim Hassan1, Desui Chen1
1Department of Materials Science and Engineering, City University of Hong Kong, 83 Tat Chee Avenue, Kowloon, Hong Kong S.A.R. 999077, P. R. China.
ACS applied materials & interfaces
|January 23, 2026
概括
调整铁酸共价有机框架 (FePc COFs) 的堆叠配置,可以显著提高它们在氧降解反应 (ORR) 中的活性. 堆叠AA的FePc COF在电催化和空气电池中表现出卓越的性能,这是由于其优化了自旋状态和电荷传输.
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
- 催化剂是一种催化剂.
背景情况:
- 共价有机框架 (COF) 是各种应用的有希望的材料,包括催化.
- 基于铁酸 (FePc) 的COF已经显示出作为电催化剂的潜力.
- 优化FePc COF的电子和结构性质对于改善它们的催化活性至关重要.
研究的目的:
- 为了研究堆叠配置对FePc COFs氧降解反应 (ORR) 的电催化活性的影响.
- 了解导致观察到的活动差异的潜在机制.
- 为了证明量身定制的FePc COF在储能装置中的潜力.
主要方法:
- 通过调整层间相互作用来合成AA叠加和AB叠加的FePc COF配置.
- 电化学表征,包括循环电压测量和旋转盘电极测量.
- 使用合成的FePc COF组装和测试的空气电池.
- 密度函数理论 (DFT) 计算以阐明电子结构和电荷传输机制.
主要成果:
- 与AB堆叠配置 (0.661V与RHE) 相比,AA堆叠的FePc COF对ORR的半波潜力显著更高 (0.856V与RHE).
- 带有AA堆叠FePc COF阴极的气电池显示出高电池电压 (1.64 V) 和特定容量 (935.79 mA hg-1).
- DFT的计算表明,被遮蔽的AA堆叠促进了自旋选择性电荷传输,并通过Fe的高自旋状态促进了ORR动力学.
结论:
- FePc COF 的堆叠配置极大地影响了它们的电子特性,包括旋转状态和电荷转移.
- 优化层间相互作用以实现特定的堆叠顺序 (例如,AA堆叠) 是增强ORR电催化的一种有效策略.
- 有控制堆叠的FePc COF为开发用于能源转换和储存应用的高效电催化剂提供了有希望的途径.
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