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Date of Publication:2022-10-09

Journal:Gao Xiao Hua Xue Gong Cheng Xue Bao/Journal of Chemical Engineering of Chinese Universities

Volume:35

Issue:2

Page Number:348-354

ISSN No.:1003-9015

Abstract:In order to investigate the effect of preparation methods on hydrogen adsorption of bimetallic organic frameworks, CoNi-MOF-74 was prepared by direct synthesis and post-synthetic ion exchange methods, respectively. The structure and morphology of the prepared CoNi-MOF-74 were characterized by XRD, SEM, ICP and N2 physical adsorption-desorption isotherm. In addition, hydrogen adsorption performance was further measured at 77 K and 100 kPa. The results show that the preparation method has significant effects on hydrogen adsorption. The hydrogen adsorption capacity of the CoNi-MOF-74 prepared by one-pot synthesis was up to 2.12% (m(Co):m(Ni) = 1;1), which was 24.7% higher than Ni-MOF-74 and 3.4% higher than CoNi-MOF-74 prepared by post-synthetic ion exchange. This preparation process is simple and efficient, which is beneficial for large-scale production. © 2021, Editorial Board of "Journal of Chemical Engineering of Chinese Universities". All right reserved.

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