调节1D金属酸盐链的组成部分,以提高电催化OER性能
Shi-Qi Li1, Li-Min Zhu1, Ru Wang1
1TKL of Organic Solar Cells and Photochemical Conversion, School of Chemistry and Chemical Engineering, Tianjin University of Technology, Tianjin 300384, China.
Inorganic chemistry
|August 6, 2025
概括
新的协调聚合物 (CPs) 被合成并加载到泡上进行氧化演化反应 (OER) 催化. 用铁进行兴奋剂显著改善了OER性能,产生了有效的催化剂的活性金属氧化.
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:
- 协调聚合物 (CP) 是模块化晶体材料,被研究为氧化演化反应 (OER) 的前催化剂.
- 控制CP转化为催化剂的活性金属氧化氧化物相仍然是一个重大挑战.
研究的目的:
- 合成和评估两个新的协调聚合物,Co-DEAPA和Co-CyNH3,作为OER的前催化剂.
- 为了研究铁兴奋剂对Co-CyNH3系统OER性能的影响.
- 建立一种简单的方法来制造高性能,非贵金属电催化剂.
主要方法:
- 合成两种离子金属氧酸盐链协调聚合物的合成: {[(DEAPA][Co(C2O4)2]}n (Co-DEAPA) 和 {[CyNH3]2[Co(C2O4)2]·H2O}n (Co-CyNH3).
- 通过溶解-再结晶方法将合成的CP装载到泡 (NF) 上,以形成电极.
- 对OER活动的电化学评估,包括在电流密度为100mA cm-2.2的超电位测量.
- 在电化学测试期间在现场生成活性金属氧化氧化物物种.
主要成果:
- 与Co-DEAPA (343 mV) 相比,由NF支持的Co-CyNH3电极表现出更高的OER活性 (290 mV超电位).
- 用铁 (FeCo-CyNH3) 兴奋Co-CyNH3系统进一步提高了OER性能,将超电位降低到255mV.
- 来自CP前体的现场生成的CoOOH和FeOOH物种被确定为催化活性站点.
结论:
- 在CPs中选择有机酸显著影响其OER催化活性.
- 将铁添加到基于的CP中是一种有效的策略,可以提高OER的性能.
- 这项工作提供了一个简单的方法,通过CP转化开发高效的非贵金属电催化剂,用于OER.
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