Enhancing Hydrogen Adsorption Capacity of Metal Organic Frameworks M(BDC)TED0.5 through Constructing a Bimetallic Structure

Renjie Li; Xin Han; Qiaona Liu; An Qian; Feifei Zhu; Jiawen Hu; Jun Fan; Haitao Shen; Jichang Liu; Xin Pu; Haitao Xu; Bin Mu

doi:10.1021/acsomega.2c01914

Enhancing Hydrogen Adsorption Capacity of Metal Organic Frameworks M(BDC)TED_0.5 through Constructing a Bimetallic Structure

ACS Omega. 2022 May 31;7(23):20081-20091. doi: 10.1021/acsomega.2c01914. eCollection 2022 Jun 14.

Authors

Renjie Li¹, Xin Han¹, Qiaona Liu¹, An Qian¹, Feifei Zhu¹, Jiawen Hu¹, Jun Fan¹, Haitao Shen¹, Jichang Liu^{1

2}, Xin Pu¹, Haitao Xu¹, Bin Mu³

Affiliations

¹ State Key Laboratory of Chemical Engineering, School of Chemical Engineering, East China University of Science and Technology, Shanghai 200237, China.
² Key Laboratory for Green Processing of Chemical Engineering of Xinjiang Bingtuan, School of Chemistry and Chemical Engineering, Shihezi University, Shihezi 832003, China.
³ School for Engineering of Matter, Transport, and Energy, Arizona State University, 501 East Tyler Mall, Tempe, Arizona 85287, United States.

Abstract

Metal organic frameworks (MOFs) have promising application prospects in the field of hydrogen storage. However, the successful application of MOFs in the field is still limited by their hydrogen storage capacity. Herein, a series of M _x M_1-x (BDC)TED_0.5 (M = Zn, Cu, Co, or Ni) with a bimetallic structure was constructed by introducing two metal ions in the synthesis process. The results of X-ray diffraction, scanning electron microscopy, energy-dispersive spectroscopy, X-ray photoelectron spectroscopy, and inductively coupled plasma showed that the bimetallic structure with different content ratios can be stably constructed by a hydrothermal method. Among them, the Cu-based bimetal MOFs Cu_0.625Ni_0.375(BDC)TED_0.5 exhibited the best hydrogen storage capacity of 2.04 wt% at 77 K and 1 bar, which was 22% higher than that of monometallic Ni(BDC)TED_0.5. The enhanced hydrogen storage capacity can be attributed to the improved specific surface area and micropore volume of bimetal MOFs by introducing an appropriate amount of bimetallic atoms.