在氧气进化反应过程中,P-Doped LaCoO3表面原子之间的协同吸附和磁合效应
Jiamei Zhang1, Hongpeng Chen1, Chunnian He1,2,3
1School of Materials Science and Engineering, Tianjin University, Tianjin 300350, China.
ACS applied materials & interfaces
|September 17, 2025
概括
在LaCoO3矿氧化物中的兴奋剂通过修改表面Co原子并启用协同吸附机制来增强氧演化反应 (OER) 催化. 这导致有效的OER催化过量的潜力显著减少.
科学领域:
- 材料科学 材料科学 材料科学
- 催化剂是一种催化剂.
- 计算化学计算化学
背景情况:
- 矿类氧化物对于高性能氧化演化反应 (OER) 催化剂至关重要.
- 了解兴奋剂机制是优化矿OER催化剂性能的关键.
- 在催化应用中,LaCoO3 是一个有前途的矿氧化物.
研究的目的:
- 为了阐明 (P) 兴奋剂对LaCoO3.3中的OER机制的影响.
- 调查P-doped LaCoO3.3中的OER途径和潜在机制.
- 为设计基于矿的先进OER催化剂提供理论指导.
主要方法:
- 使用第一原则计算来研究OER路径.
- 由于P兴奋剂而导致的电子结构变化的分析.
- 对表面吸附和重建现象的研究.
主要成果:
- P 兴奋剂改变了表面 Co 原子的协调,使 Co-3d 波段中心更接近费米水平.
- 发现了一种涉及表面Co和晶格O的协同吸附机制 (SAM),与AEM和LOM不同.
- 该SAM路径导致0.24V的低超电位与容易的O2脱吸,有助于磁合状态.
结论:
- 通过电子和结构修改,P兴奋剂显著提高了LaCoO3的OER催化性能.
- 发现的协同吸附机制 (SAM) 为高效的OER提供了一条新的途径.
- 磁性合状态在减少OER过量的潜在作用中起着至关重要的作用,指导着未来的催化剂设计.
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