Two new 3D isostructural Co/Ni-MOFs showing four-fold polyrotaxane-like networks: Synthesis, crystal structures and hydrogen evolution reaction

• Published in: Inorganic chemistry communications 2018-12, Vol.98, p.141-144
• Main Authors: Wang, Xiao, Luo, Jia-Yang, Tian, Jun-Wu, Huang, Dan-Dan, Wu, Ya-Pan, Li, Shuang, Li, Dong-Sheng
• Format: Article
• Language: English
• Subjects: 1,3-di(3′,5′-dicarboxylphenyl)benzene; Co/Ni-MOF; Crystal structure; Hydrogen evolution reaction; Topology
• ISSN: 1387-7003; 1879-0259
• DOI: 10.1016/j.inoche.2018.10.020

Two new 3D isostructural MOFs, [M(ddbp)0.5(4,4′-biby)0.5(H2O)2](M = Co/Ni, H4ddbp = 1, 3-di (3′,5′-dicarboxylphenyl)benzene, 4,4′-biby = 4,4-bipyridine) with four-fold poly-rotaxane-like networks, have been successfully synthesized and characterized. The hydrogen evolution reaction of two complexes has also been investigated. Notably, Co-MOF has better HER performance with a smaller overpotential of 357 mV at 10 mA·cm−2, lower Tafel slope of 107 mV·dec−1. Two nevol 3D isostructural Co/Ni-MOF present infrequent four-fold polyrotaxane-like networks with a new (3, 4)-connected net. The electrocatalytic results demonstrate that Co-MOF exhibits better HER performance with a smaller overpotential and lower Tafel slope. [Display omitted] •Two new 3D isostructural Co/Ni-MOFs with infrequent four-fold polyrotaxane-like networks have been synthesized.•The HER reaction kinetics of Co-MOF catalyst is more favorable than Ni-MOF.•Co-MOF exhibits better HER performance with a low overpotential and a small Tafel slope.