加强氧气还原反应的第一原则研究在石墨烯和剂合的石墨烯涂层金表面上
Ho Ngoc Nam1,2, Quan Manh Phung3,4, Pongpol Choeichom1
1Institute of Materials Innovation, Institutes of Innovation for Future Society, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8601, Japan. honam@sp.material.nagoya-u.ac.jp.
Physical chemistry chemical physics : PCCP
|March 21, 2024
概括
金表面的石墨烯涂层增强了燃料电池的氧降解反应 (ORR) 活性. 对的兴奋剂{111)@碳进一步提高了ORR性能,显示了电化学技术的前景.
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:
- 基于的电催化剂对于高性能燃料电池至关重要.
- 石墨烯涂层在实验中被用作金表面的保护层.
研究的目的:
- 为石墨烯对电催化剂的影响提供理论基础.
- 通过使用DFT计算,研究涂上石墨烯的表面的氧降解反应 (ORR) 活性.
主要方法:
- 密度函数理论 (DFT) 的计算.
- 评估Pt(100),Pt(110和Pt(111) 表面的几何和电子特性.
- 裸体和涂石墨烯的金表面的比较.
主要成果:
- 石墨烯涂层改变了氧气吸附,并增强了电荷转移.
- Pt(111) 呈现出最高的内在ORR活性,其次是Pt(110) 和Pt(100).
- 涂有石墨烯涂层的Pt ((111)) 显示了涂层表面中最低的激活能量,ORR发生在非缺陷的Pt@graphene上.
结论:
- 石墨烯涂层为ORR提供了具有竞争力的催化活性.
- 在Pt{111}@C上兴奋剂显著增强ORR活动.
- 用添加的Pt@C是电化学技术的一个有前途的电催化剂.
相关概念视频
Catalysis
The presence of a catalyst affects the rate of a chemical reaction. A catalyst is a substance that can increase the reaction rate without being consumed during the process. A basic comprehension of a catalysts’ role during chemical reactions can be understood from the concept of reaction mechanisms and energy diagrams.
Oxidation of Alcohols
In this lesson, the oxidation of alcohols is discussed in depth. The various reagents used for oxidation of primary and secondary alcohols are detailed, and their mechanism of action is provided.
The process of oxidation in a chemical reaction is observed in any of the three forms:
The process of oxidation in a chemical reaction is observed in any of the three forms:


