在性条件下的铁存在中的,用于氧-演化反应
Meysam Maazallahi1, Subhajit Nandy2, Pavlo Aleshkevych3
1Department of Chemistry, Institute for Advanced Studies in Basic Sciences (IASBS), Zanjan 45137-66731, Iran.
Langmuir : the ACS journal of surfaces and colloids
|November 16, 2023
概括
(Pb) 在性条件下表现出较差的氧化演化反应 (OER) 活性. 添加酸盐 (K2FeO4) 增强了Pb表面的OER,形成了活性Fe(IV) 物种,但粘附性限制了长期使用.
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
- 储能 储能 储能 储能 储能 储能
背景情况:
- 氧化演化反应 (OER) 对于水分和能量储存至关重要,但面临着挑战.
- (Pb) 在性介质中对OER具有有限的内在催化活性.
研究的目的:
- 为了研究 Pb 在性溶液中的 OER 的电催化活性.
- 探索酸盐 (K2FeO4) 作为可溶性铁源对基于Pb的OER催化剂的影响.
- 描述OER过程中形成的中间和活性物种.
主要方法:
- 电化学测量 (循环电压测量,时测量).
- 在现场光谱 (拉曼,可见).
- 现场表征 (HR-TEM,SEM,ESR,EPR,XRD,XAS) 的情况.
主要成果:
- 单纯的Pb显示出极少的OER活动.
- 添加K2FeO4显著提高了Pb电极上的OER活性.
- 在OER期间观察到稳定的Fe (IV) 物种.
- 沉积在Pb/PbO2上的铁离子作为有效的OER催化剂.
结论:
- 来自K2FeO4的Fe物种是Pb表面上有效的OER催化剂.
- 催化增强是暂时的,因为Fe物种的粘附性差.
- 需要进一步的研究,以改善基于Fe的催化剂的稳定性,以实现高效的水分解.
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