操纵Fe原子的旋转状态以提高表面反应动力学,朝着强大的光催化进化
Yan Li1, Xiaoran Ma2, Junxian Bai1
1School of Chemistry and Chemical Engineering, State Key Laboratory of Pulp and Paper Engineering, Guangdong Provincial Key Laboratory of Fuel Cell Technology, South China University of Technology, Guangzhou, 510640, China.
Angewandte Chemie (International ed. in English)
|August 19, 2025
概括
调节铁单个原子 (SAs) 的自旋状态,从低自旋转到中自旋转,可以增强光催化进化 (PHE). 这一战略提高了的生产速度和催化剂的稳定性.
科学领域:
- 材料科学 材料科学 材料科学
- 催化剂是一种催化剂.
- 摄影化学的使用.
背景情况:
- 光催化演化 (PHE) 对于清洁能源生产至关重要.
- 过渡金属催化剂在PHE中的性能通常受到表面反应动力学,特别是电子旋转状态转换的限制.
- 了解和控制单原子催化剂 (SAC) 中的自旋状态是提高效率的关键.
研究的目的:
- 调节单个铁原子 (SAs) 的电子自旋状态,以增强光催化演化 (PHE).
- 研究旋转状态转换对演化反应 (HER) 的动力学和效率的影响.
- 通过旋转极化,提高光生成载体的利用率.
主要方法:
- 采用生物矿物化策略,合成固定在与ZnIn2S4 (ZIS) 集成的碳基质 (Fer-N-C) 上的单个铁原子 (SA).
- 将Fe SAs的协调配置从Fe-N4转变为Fe-N3S,从而诱导自旋状态从低自旋 (LS) 过渡到中自旋 (MS).
- 描述了催化剂结构和电子特性,以与催化性能相关联.
主要成果:
- 通过Fe-N3S配置成功实现了Fe SAs从LS到MS的旋转状态调节.
- 旋转状态过渡调节了轨道方向和电子合,增强了HER的动力学.
- 铁-N-C@ZIS催化剂表现出高的H2演化率~31 mmol g-1 h-1和优异的稳定性 (>25小时).
结论:
- 生物矿物化诱导的Fe SAs的旋转状态调节是促进光催化进化的有效策略.
- Fe-N3S 协调和由此产生的旋转极化增强了催化活性和载体利用.
- 开发的Fer-N-C@ZIS催化剂显示了高效和稳定的生产的巨大潜力.
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