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Dual Tuning of Ultrathin α‑Co(OH)2 Nanosheets by Solvent Engineering and Coordination Competition for Efficient Oxygen Evolution
journal contribution
posted on 2018-12-26, 00:00 authored by Zuozhong Liang, Chaochao Zhang, Yang Xu, Wei Zhang, Haoquan Zheng, Rui CaoLarge-scale preparation
of ultrathin 2D Co-based nanosheets is
of great importance in the fields of catalysis, energy conversion,
etc. Herein, we have developed a simple preparation method of 2D ultrathin
α-Co(OH)2 nanosheets by mixing an aqueous solution
of Co salt and a methanolic solution of 2-methylimidazole at room
temperature. The resulting α-Co(OH)2 materials are
nanosheets with an average thickness of ∼2.5 nm and the size
in micrometers. Benefiting from the ultrathin thickness, this α-Co(OH)2 nanosheet exhibits excellent oxygen evolution reaction performance
with an overpotential of 267 mV at j = 10 mA cm–2. This strategy can be applied to prepare other 2D
Co-based layered double or triple hydroxides. Therefore, this work
provides new strategies to prepare a series of 2D hydroxide nanosheets
with solvent engineering and coordination competition.
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Co salt2- methylimidazolemethanolic solutionenergy conversionEfficient Oxygen Evolution Large-scale preparationSolvent EngineeringCoordination Competitionα-ultrathin thicknessstrategy2 D Co-basedultrathin 2 D Co-based nanosheets267 mVoxygen evolution reaction performance2 D hydroxide nanosheetsDual Tuningpreparation methodcoordination competitionroom temperature
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