关于Ce介导的基于CoFe的无形 (氧) 氧化物中氧化演变催化增强的见解
Ji-Dong Song1, Hao Hu2, Jian-Li Mi1
1School of Materials Science and Engineering, Jiangsu University, Zhenjiang 212013, China. jlmi@ujs.edu.cn.
Dalton transactions (Cambridge, England : 2003)
|September 23, 2025
概括
(Ce) 融入铁 (氧) 氧化物增强氧演变反应 (OER) 催化,增加表面积和电荷转移,而不是内在活性. 这一策略通过形态和导电性控制优化了OER催化剂的性能.
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:
- 层状双氧化物 (LDHs) 和 (oxy) 氧化物是氧化演化反应 (OER) 催化的主要材料.
- 异原子兴奋剂和纳米结构工程是改善OER性能的常见策略,但底层机制仍在争论中.
研究的目的:
- 调查 (Ce) 融入无形铁 (氧) 氧化物纳米颗粒中的作用.
- 阐明Ce合并,纳米结构和OER活动之间的关系.
主要方法:
- 在尼克尔泡 (NF) 上的一步电沉积Cee纳入的无形CoFe-(oxy) 氧化纳米颗粒.
- 电化学表征以评估OER活动,超电位和电荷转移电阻.
主要成果:
- 在低超电位 (0.220 V 在 10 mA cm-2 时) 实现了优异的 OER 活动.
- 加入Ce抑制了内在活性和反应动力学,但提高了OER的整体性能.
- 增强的活性归因于增加的电化学活性表面积 (由于抑制的粒子凝聚) 和调节的界面电荷传输电阻.
结论:
- 将Ce纳入CoFe-氧氧化物主要通过形态工程和增强的电荷转移来提高OER性能,而不是通过自身的活性增强.
- 本研究提供了通过控制颗粒大小和电导率来设计高性能OER催化剂的策略.
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