Chem. J. Chinese Universities ›› 2022, Vol. 43 ›› Issue (8): 20220196.doi: 10.7503/cjcu20220196

• Physical Chemistry • Previous Articles     Next Articles

Density-functional Theoretical Study on the Interaction of Indium Oxyhydroxide Clusters with Carbon Dioxide and Methane

HE Hongrui, XIA Wensheng(), ZHANG Qinghong, WAN Huilin   

  1. State Key Laboratory of Physical Chemistry of Solid State Surface,National Engineering Laboratory for Green Chemical Productions of Alcohols?Ethers?Esters,Fujian Province Key Laboratory of Theoretical and Computational Chemistry,College of Chemistry and Chemical Engineering,Xiamen University,Xiamen 361005,China
  • Received:2022-03-30 Online:2022-08-10 Published:2022-05-09
  • Contact: XIA Wensheng E-mail:wsxia@xmu.edu.cn
  • Supported by:
    the National Key Research and Development Program of China(2019YFE04400);the National Natural Science Foundation of China(21373169);the Ministry of Education Innovation Team Development Program Project, China(IRT1036)

Abstract:

Both carbon dioxide(CO2) and methane(CH4) as fossil energy gas fuel are chemically stable molecules with a large greenhouse effect, so it is theoretical and practical significance to investigate their activation, transformation and utilization. The density functional theory(DFT) method were used to investigate computationally the interaction of indium oxide clusters with CO2, CH4 and CO2+CH4. The results show that, indium oxide clusters activate CO2 and CH4via —In—O(bridge)— with [2+2] addition mode, and the presence of hydroxyl changes the local charge of the active site of indium oxide clusters, leading to significantly decrease of activation free barrier for their interaction with CO2 and CH4, and then making the activation be easily proceeded. Interestingly, the difference of local charges between In and O(qInqO) of the active site —In—O— correlates well with the activation of CO2 and CH4i.e., the greater the qInqO, the lowest the activation free barrier for their interaction with CO2 and CH4. For activation of CO2 and CH4 by indium oxyhydroxide clusters, electrons transfer to CO2 and CH4 from the clusters(nucleophilic activation), and for that by indium oxide clusters without hydroxyl, the opposite transfer of electrons occurs(electrophilic activation).

Key words: Indium oxyhydroxide, Carbon dioxide, Methane, Density functional theory(DFT)

CLC Number: 

TrendMD: