Source https://mp.weixin.qq.com/s/aC2kKhYCmyR-uMdEv2G4Vw

The activation of O2 molecule is a Committed step in the oxidation reaction.

In view of this, Guo Yanbing of Central China Normal University and others reported that a stable catalyst with high catalytic activity was developed to activate O2 molecule by using the sp hybrid C ∨ C triple bond in Graphyne as the power-supply daughter. It was found that the Cu atom in the sub nano cluster CuO/Graphyne substrate was adjacent to the sp hybrid C atom adsorbed in the form of bridge adsorption, which was the key activated O2 molecular site.

Key points of this article

Key points 1. The synthesized sub nano cluster CuO/Graphyne catalyst showed the best CO oxidation performance at 133 ℃, achieving 50% CO conversion, 34 ℃ and 94 ℃ lower than the best catalytic temperature of CuO/Graphene catalyst and CuO/activated carbon catalyst respectively.

Key point 2. Through in situ DRIFT characterization and DFT simulation calculations, it is verified that the sp hybrid carbon atoms adjacent to the CuO cluster are more conducive to promoting the rapid decomposition of carbonates than the sp2 hybrid carbon atoms, and this decomposition process does not need to overcome energy barriers; CO gas molecules can directly react with O2 molecules and undergo oxidation reactions through the E-R mechanism at a low energy barrier of 0.2 eV.

This paper shows that the sp hybrid carbon of Graphyne can achieve lower activation energy in the catalytic reaction, improve the ability of catalytic activation of O2, and contribute to the development of low-temperature oxidation reaction methods.

Chuanqi Pan, Chenyang Wang, Xinya Zhao, Peiyan Xu, Feihong Mao, Ji Yang, Yuhua Zhu, Ruohan Yu, Shiyi Xiao, Yarong Fang, Hongtao Deng, Zhu Luo, Jinsong Wu, Junbo Li, Shoujie Liu, Shengqiang Xiao, Lizhi Zhang, and Yanbing Guo *, Neighboring sp Hybrid Carbon Participated Mo Regular Oxygen Activation on the Interface of Sub cluster CuO/Graphiyne, J. Am. Chem Soc. 2022

DOI: 10.1021/jacs.1c12772

https://pubs.acs.org/doi/10.1021/jacs.1c12772