基于Ni的电极表面与不同的单原子兴奋剂的演变反应的电子性质的第一原则计算
Jianping Zeng1, Yan Zhang2, Shuyu Zeng2
1School of Chemistry and Chemical Engineering, Yancheng Institute of Technology, Yancheng, 224051, China; Department of Chemistry, Nanjing University of Science and Technology, Nanjing, 210094, China.
Journal of molecular graphics & modelling
|May 15, 2024
概括
在以为基础的电极中的兴奋剂显著增强了水电解的演化反应 (HER). 这种兴奋剂改变了电荷转移和电子特性,提高了生产效率.
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
- 计算化学计算化学
背景情况:
- 演化反应 (HER) 对基于水电解的生产至关重要.
- 基于的电极对HER至关重要,但需要优化.
- 了解电极表面相互作用是提高效率的关键.
研究的目的:
- 研究单原子兴奋剂 (Mo,Co,Fe,Cr) 对基于Ni的电极表面 (NES) 的影响.
- 分析兴奋剂如何影响HER期间的电荷转移和电子结构.
- 为开发先进的基于Ni的HER电极材料提供理论基础.
主要方法:
- 利用材料工作室 (MS) 软件来设计和建造合Ni基电极表面模型.
- 运用第一原理计算来研究电极特性和吸附.
- 分析了工作功能,电荷转移,价值带 (VB) 顶部,导电带 (CB) 底部,和状态的总密度 (TDOS).
主要成果:
- 单原子兴奋剂有效地改变了纯的工作功能.
- (Mo) 兴奋剂最显著地影响了吸附的H原子之间的距离,促进它们作为H+离子离开.
- 与Mo相比,Co,Fe和Cr兴奋剂导致H2分子脱离,对H-H距离的影响较小.
- 兴奋剂改变了电子带结构 (VB顶部和CB底部相对于费米水平),影响了HER的性能,Mo显示了最明显的效果.
- 状态的总密度 (TDOS) 主要来自和Ni原子的d轨道.
结论:
- 单原子兴奋剂,特别是Mo,可以显著调整基于Ni的电极的电子和表面特性,以增强HER.
- 该研究提供了对HER兴奋剂效应机制的理论见解.
- 这些发现支持开发基于Ni的新型电极材料,通过水电解有效生产气.
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