通过单原子和空位的双位协同机制驱动了层叠的双氧化物中的格子氧激活
Shixin Wu1, Wenyu Lu2, Shijun Zhao2
1School of Physics and Technology, and Hubei Nuclear Solid Physics Key Laboratory, Wuhan University, Wuhan, 430072, China.
Advanced science (Weinheim, Baden-Wurttemberg, Germany)
|December 5, 2025
概括
这项研究引入了一种新方法,通过将单个原子和NiFe层状双氧化物中的空白相结合,创建高效的氧化演化反应 (OER) 催化剂. 这种缺陷工程方法显著提高了催化剂的性能和稳定性.
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:
- 氧化演化反应 (OER) 对能量转化技术至关重要.
- 开发高效和稳定的开放能源催化剂对于实际应用至关重要.
- 对于格子氧机制 (LOM) 路径中单个原子和空隙之间的协同效应的理解还没有得到充分的探索.
研究的目的:
- 调查OER中LOM路径单个原子和空缺之间的协同效应.
- 开发一种强大的,高效的催化剂,用于氧的演化反应.
- 建立缺陷工程,单原子催化和LOM之间的直接联系.
主要方法:
- 通过离子辐射辅助的策略,在NiFe层状双氧化物 (LDH) 中引入受控的氧空缺.
- 在高负荷 (7.4重量%) 的NiFe LDH上固定单个原子 (Mo).
- 了解电子结构和反应机制的第一原则计算.
主要成果:
- 优化的SA Mo-NiFe LDH/Ti催化剂显示过电势的显著降低 (226 mV在10 mA cm-2).
- 由于空位的限制,催化剂在500 mA cm-2下保持了600小时的稳定性.
- 莫单个原子与氧气空缺相结合,增强了吸附和晶格氧气激活.
结论:
- 由单个Mo原子和空位对晶格氧的协同激活优化了OER的电子结构.
- 缺陷工程与单原子催化剂相结合,为合理的催化剂设计提供了一个强大的战略.
- 这项工作建立了缺陷工程,单原子催化和OER的LOM途径之间的直接联系.
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