Fe嵌入式双烯的双功能电催化活性用于氧降解和进化反应
Junkai Xu1, Yang Gao1, Jing Li1
1College of Physics and Engineering, Qufu Normal University, Qufu, Shandong 273165, China. yanxunwang@163.com.
Physical chemistry chemical physics : PCCP
|July 25, 2023
概括
我们在新型二维材料双上探索过渡金属单原子催化剂 (SAC). FeN4-双烯对氧反应具有卓越的双功能催化活性.
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.
- 表面化学 表面化学
背景情况:
- 过渡金属单原子催化剂 (SAC) 对化学工业至关重要.
- 石墨烯是SAC的常见基质,但需要新的2D材料.
- 双烯,一种新的石墨烯异构物,为SACs提供了一个有前途的基质.
研究的目的:
- 为了研究在双烯基基底上支的过渡金属SACs (M = Fe,Co,Ni).
- 评估这些SACs对于氧气减少和进化反应的催化潜力.
- 了解控制催化活动的电子结构和相互作用.
主要方法:
- 使用第一原则计算来预测MN4-双烯结构的特性.
- 密度函数理论 (DFT) 用于分析电子结构和反应机制.
- 计算的重点是Fe,Co和Ni原子与二烯网格上的相协调.
主要成果:
- FeN4-二烯在氧降解反应 (ORR) 和氧演化反应 (OER) 方面表现出优异的双功能催化活性.
- 计算了低超电位:对于FeN4-二烯, ηORR = 0.11 V 和 ηOER = 0.27 V.
- FeN4-双烯的高活性归因于d波段中心位置和FeN4-双烯与中间体的相互作用.
结论:
- FeN4-双烯是一种非常有前途的单原子催化剂,用于双功能氧气电催化.
- 双烯作为设计先进的单原子催化剂的有效基质.
- 这些发现为高效电催化剂的设计原则提供了理论见解.
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