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A 3D Ni8-cluster-based MOF as a molecular electrocatalyst for alcohol oxidation in alkaline media
Wei-Juan Chen, Tian-Yu Zhang, Xue-Qian Wu*, Yong-Shuang Li, Yunling Liu, Ya-Pan Wu, Zhao-Bo He, Dong-Sheng Li*
Chin. J. Struct. Chem., 2023, 42: 100018. DOI: 10.1016/j.cjsc.2023.100018
February 15, 2023
ABSTRACT
The active and cost-effective anode catalyst is highly desirable for the practical application of direct alcohol fuel cells (DAFCs), but the relevant exploration is still challenging. In this work, a new Ni(II)-based metal-organic framework (MOF), {[Ni4(μ3-OH)2(TMBTI)(INA)(H2O)]·H3O}n (H6TMBTI = 2,4,6-trimethylbenzene-1,3,5-triylisophthalate, HINA = isonicotinic acid) (CTGU-30, CTGU = China Three Gorges University), was successfully synthesized under solvothermal conditions. CTGU-30 possesses a novel Ni8(μ3-OH)4(COO)14 secondary building unit (SBU) and a rare binodal (6,14)-connected network. Owing to the high density of metal sites and prominent pore system within CTGU-30, it could serve as an efficient molecular electrocatalyst towards the methanol oxidation reaction (MOR), ethanol oxidation reaction (EOR), n-propanol oxidation reaction (NPOR), and isopropanol oxidation reaction (IPOR) with the peak current densities ranging from 20.1 to 32.7 mA cm−2 in alkaline media. The mass/charge transfer efficiency and operation durability of CTGU-30 in different electrocatalysis processes have also been investigated. This work will further inspire the design of highly-connected metal-cluster-based MOFs and promote the construction of molecular electrocatalysts for more energy conversion applications.
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