解开Ce dopant的演变:NiFeOOH/CeO2的形成,以增强水的氧化
Kailu Guo1, Huijiao Wang2, Xiaoning Gao1
1College of Chemistry and Chemical Engineering, Luoyang Normal University, Luoyang 471934, China. guokailu@lynu.edu.cn.
Dalton transactions (Cambridge, England : 2003)
|August 14, 2025
概括
在NiFe氧化物电催化剂中的兴奋剂在氧化演化反应 (OER) 过程中导致自组合成NiFeOOH/CeO2. 这种重建增强了催化性能和稳定性.
科学领域:
- 电化学 电化学 电化学
- 材料科学 材料科学 材料科学
- 催化剂是一种催化剂.
背景情况:
- (Ce) 是高性能氧化演化反应 (OER) 电催化剂的关键剂.
- 了解OER期间的兴奋剂的结构演变至关重要,但往往缺乏.
- 电化学重建显著改变了催化剂结构.
研究的目的:
- 在OER期间调查无形Ce-dopedNiFe氧化物 (Ce-FeNiO) 的结构演变.
- 阐明Ce dopants在电化学重建过程中的作用.
- 了解CeO2集成如何影响基于NiFe的催化剂的OER性能.
主要方法:
- 无形Ce-FeNiO的一步室温腐蚀合成.
- 在OER之前和之后的电化学表征.
- 先进的材料表征技术.
- 理论计算 (DFT). 理论计算 (DFT). 理论计算 (DFT). 理论计算 (DFT). 理论计算 (DFT). 理论计算 (DFT). 理论计算 (DFT). 理论计算 (DFT). 理论计算 (DFT). 理论计算 (DFT). 理论计算 (DFT). 理论计算 (DFT). 理论计算 (DFT). 理论计算 (DFT). 理论计算 (DFT). 理论计算 (DFT). 理论计算 (DFT.)
主要成果:
- 化剂改变了NiFe氧化物形态,并引入了高价值的Fe和Ni离子.
- Ce-FeNiO经历了显著的电化学重建,形成NiFeOOH与嵌入的CeO2纳米粒子.
- 理论计算证实,CeO2集成优化了电子结构和中间吸附.
- 重建的NiFeOOH/CeO2催化剂表现出较低的OER超电位 (221 mV在10 mA cm-2) 和出色的稳定性 (>100小时在500 mA cm-2).
结论:
- 在OER期间,Ce dopants在NiFeOOH矩阵内自组合成CeO2纳米粒子.
- 这种重建过程是Ce-doped NiFe催化剂增强的OER活性和稳定性的关键.
- 这项研究为Ce-doped OER电催化剂的电化学重建提供了基本的见解.
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