单双过渡金属原子定C2N作为CO氧化的一种高活性催化剂:一项第一原则研究
S Abdel Aal1, K A Soliman2, A S Shalabi2
1Department of Chemistry, Faculty of Science, Benha University, P.O. Box 13518, Benha, Egypt; Department of Chemistry, College of Science, Qassim University, Saudi Arabia.
我们在C2N上研究了双重非贵金属原子对一氧化碳 (CO) 的氧化. 通过Eley-Rideal机制,Ti2@C2N催化剂显示出高活性,为燃料电池和环境问题提供了低成本的解决方案.
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.
- 计算化学的计算化学
背景情况:
- 一氧化碳 (CO) 氧化对于燃料电池的耐用性和环境修复至关重要.
- 开发高效,低成本的CO氧化催化剂是一个重大挑战.
- 非贵金属催化剂作为贵金属的替代品非常受欢迎.
研究的目的:
- 为了研究在C2N上的双重非贵金属原子的催化活性,用于CO氧化.
- 评估Ti@C2N和Ti2@C2N系统的热力学稳定性和电子特性.
- 确定在Ti2@C2N上氧化CO的首选反应机制和能量障碍.
主要方法:
- 密度函数理论 (DFT) 计算被用来研究Ti@C2N和Ti2@C2N系统.
- 计算包括约束能量,电子特性,NBO,边界轨道,统计热力学,PDOS,NCI和QTAIM分析.
- 通过Eley-Rideal (ER) 和Langmuir-Hinshelwood (LH) 机制评估了CO氧化反应途径和能量障碍.
主要成果:
- Ti@C2N和Ti2@C2N都表现出热力学稳定性.
- Ti2@C2N催化剂对CO氧化具有很高的活性.
- 发现Eley-Rideal (ER) 机制在Ti2@C2N上对CO氧化更有利,低能屏障为0.16 eV,而LH机制的0.73 eV.
- 该研究还表明了Ti2@C2N催化剂的潜在非线性光学 (NLO) 行为.
结论:
- 双原子催化剂Ti2@C2N是一个高度活跃和有前途的候选人在环境温度下进行CO氧化.
- 在Ti2@C2N上,ER机制是CO氧化的首选途径.
- 这项研究为设计具有成本效益的非贵金属纳米催化剂用于CO氧化和潜在的NLO应用提供了宝贵的见解.
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