A first-principles study of gas molecule adsorption on hydrogen-substituted graphdiyne

Publication date: Available online 14 February 2020Source: Physics Letters AAuthor(s): Mingxia Song, Yuhong Chen, Xiaocong Liu, Wenhui Xu, Yingjie Zhao, Meiling Zhang, Cairong ZhangAbstractHydrogen-substituted graphdiyne (HsGDY) is a novel alkynyl carbon material with a structure similar to that of graphene. In this paper, the adsorption of four gas molecules (NO, NO2, NH3, and N2) on HsGDY and B-doped HsGDY (B-HsGDY) was studied using density functional theory. The results show that the adsorption of NO and NO2 on HsGDY and B-HsGDY is characterized by a larger charge transfer, stronger interaction, and higher adsorption energy compared with that of NH3 and N2. Based on the doping with B atoms, the adsorption energies of the gas molecules on HsGDY significantly improve, especially that of NO and NO2. The gas molecule adsorption on both HsGDY and B-HsGDY is physical adsorption and the adsorption selectivity is good and thus may be applied for gas-sensitive NO and NO2 materials.

Source: Physics Letters A - February 16, 2020 Category: Physics Source Type: research