探索CeH0/+集群的结构和储能
H H Zhao1, S J Huang2, X S Li2
1Henan Joint International Research Laboratory of Nanocomposite Sensing Materials, School of Materials Science and Engineering, Anyang Institute of Technology, Anyang 455000, People's Republic of China.
稀土元素的兴奋剂,特别是化 (CeHn) 集群,显示出对储存的希望. CeH13和CeH14+星团表现出高稳定性和显著的储能能力.
科学领域:
- 材料科学 材料科学 材料科学
- 计算化学计算化学
- 储存气的储存方式
背景情况:
- 具有独特的4f轨道的稀土元素对于增强存储材料至关重要.
- 化 (CeHn) 集群正在研究其在先进的储存应用中的潜力.
研究的目的:
- 确定中性和阴离子化 (CeHn0/+,n=2-20) 集群的稳定结构.
- 评估这些集群的储能和稳定性.
主要方法:
- 通过粒子优化 (CALYPSO) 方法利用了晶体结构分析.
- 用密度函数理论 (DFT) 进行结构和电子分析.
- 计算了吸附能量和分析了分子轨道组成.
主要成果:
- 确定了CeH13 (双重,Cs对称) 和CeH14+ (双重,C2v对称) 的稳定结构.
- 观察到原子对原子的偏好的化学吸附.
- 归因于H1s和Ce 4f轨道之间的杂交,使得星团稳定.
结论:
- CeH13和CeH14+群体表现出显著的稳定性和分别8.5%和9.1%的显著储能.
- 这些发现突显了化集群对于高效的储存解决方案的潜力.
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