通过三步表面重建,将商业泡激活为高效的氧气演化反应电催化剂
Boxu Gao1, Xue Yang1, Xueliang Fan1
1Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Laboratory of Advanced Materials and Collaborative Innovation Center of Chemistry for Energy Materials, Fudan University, Shanghai 200433, China.
ACS applied materials & interfaces
|December 4, 2023
概括
商业泡 (CNF) 用简单的三步过程重建成高效的氧演化反应 (OER) 催化剂. 这种激活的CNF在性介质中表现出极好的OER性能和稳定性,适合工业应用.
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
- 催化剂是一种催化剂.
背景情况:
- 为氧化演化反应 (OER) 开发高效的电催化剂对于能量转化技术至关重要.
- 直接利用大量的材料,如商业泡 (CNF) 作为催化剂,需要有效地修改表面.
研究的目的:
- 开发一种简单有效的方法,使CNF重建成高性能OER电催化剂.
- 调查预激活过程中的每个步骤对催化性能的贡献.
主要方法:
- 采用了三步预激活过程,包括化,高压处理和浸入电解质.
- 进行了电化学表征,以评估性介质中的OER性能.
- 分析了表面形态和元素组成,以了解重建机制.
主要成果:
- 优化的CNF催化剂实现了228mV (10mA·cm−2) 和267mV (100mA·cm−2) 的低超电位.
- 催化剂在 500 mA·cm-2 的高电流密度下长时间表现出了显著的稳定性.
- 化扩大了活性表面,高压处理改变了Ni价值,Fe异构原子的结合通过Ni-Fe相互作用增强了催化活性.
结论:
- 一种简单的三步预激活方法有效地将CNF转化为高效和稳定的OER电催化剂.
- 该研究强调了表面重建,价值调节和异构原子兴奋剂的协同效应,以提高催化性能.
- 这种方法为在工业过程中大规模应用基催化剂提供了一个有前途的战略.
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