ja0c01916_si_001.pdf (1.75 MB)
Metal–Organic Framework Hexagonal Nanoplates: Bottom-up Synthesis, Topotactic Transformation, and Efficient Oxygen Evolution Reaction
journal contribution
posted on 2020-04-09, 14:43 authored by Yifan Lin, Hao Wan, Dan Wu, Gen Chen, Ning Zhang, Xiaohe Liu, Junhui Li, Yijun Cao, Guanzhou Qiu, Renzhi MaRational
design and bottom-up synthesis based on the structural
topology is a promising way to obtain two-dimensional metal–organic
frameworks (2D MOFs) in well-defined geometric morphology. Herein,
a topology-guided bottom-up synthesis of a novel hexagonal 2D MOF
nanoplate is realized. The hexagonal channels constructed via the
distorted (3,4)-connected Ni2(BDC)2(DABCO) (BDC
= 1,4-benzenedicarboxylic acid, DABCO = 1,4-diazabicyclo[2.2.2]octane)
framework serve as the template for the specifically designed morphology.
Under the inhibition and modulation of pyridine through a substitution–suppression
process, the morphology can be modified from hexagonal nanorods to
nanodisks and to nanoplates with controllable thickness tuned by the
dosage of pyridine. Subsequent pyrolysis treatment converts the nanoplates
into a N-doped Ni@carbon electrocatalyst, which exhibits a small overpotential
as low as 307 mV at a current density of 10 mA cm–2 in the oxygen evolution reaction.