不同的N/C协调电子结构对氧气电极双功能稀土伊特电催化剂的活性的影响
Tao Xu1, Daomiao Wang1, Qiming Fu1
1School of Materials Science and Engineering, Faculty of Materials Metallurgy and Chemistry, Jiangxi University of Science and Technology, Ganzhou 341000, China.
Langmuir : the ACS journal of surfaces and colloids
|July 26, 2024
概括
这项研究探讨了用于电化学能源的稀土二氧化碳催化剂. 基改性催化剂对氧减少和演化反应表现出极好的双功能活性,为高效的能源解决方案铺平了道路.
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
- 计算化学的计算化学
背景情况:
- 双功能电催化剂对于电化学能源应用至关重要.
- 开发高效的氧气电极催化剂仍然是一个重大挑战.
- 稀土元素为催化应用提供了独特的特性.
研究的目的:
- 研究YbNC-gra催化剂的结构-活性关系.
- 探索在缺陷石墨烯上支的单原子稀土的双功能活性.
- 为设计先进的稀土电催化剂提供理论见解.
主要方法:
- 使用密度函数理论 (DFT) 的计算.
- 对催化剂稳定性,电子性质和催化性能进行系统分析.
- 评估氧减少反应 (ORR) 和氧演化反应 (OER) 活动.
主要成果:
- 所有研究的YbNC-gra催化剂都表现出热力学和运动稳定性.
- YbN2C2-oppo-gra和YbN2C2-pen-gra在酸性介质中表现出良好的ORR活性 (超电位为0.53和0.65V).
- 基改性Yb(OH)NC-gra催化剂在性介质中显示出优异的双功能ORR/OER活性,超电位低于0.6V,特别是Yb(OH)N4C0-gra的0.33V (ORR) 和0.42V (OER).
结论:
- 基基改造显著增强了稀土支持催化剂的双功能催化活性.
- 该研究验证了使用基基改性YbNC-gra用于高效的电化学能量转换的可行性.
- 这些发现为开发新型高性能稀土基双功能电催化剂提供了理论基础.
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