MOF-mediated synthesis of monodisperse Co(OH)2 flower-like nanosheets for enhanced oxygen evolution reaction. (20th May 2018)

• Record Type: Journal Article
• Authors: Cui, Cao; Wang, Jingyun; Luo, Zhenguo; Wang, Jin; Li, Chunxia; Li, Zhengquan
• Is Part Of: Electrochimica acta. Volume 273(2018)
• Page Start: 327
• Page End: 334
• Publication Date: 2018-05-20
• Subjects: Electrocatalysts -- Cobalt hydroxide -- Nanosheets -- Oxygen evolution reaction; Electrochemistry -- Periodicals; Electrochemistry, Industrial -- Periodicals; 541.37
• DOI: 10.1016/j.electacta.2018.04.016
• Languages: English
• ISSNs: 0013-4686

Abstract

Abstract: Cobalt hydroxide in α-form (α-Co(OH)2 ) is an attractive electrocatalyst for oxygen evolution reaction (OER). Traditional preparation of α-Co(OH)2 nanosheets often leads to a packing morphology after synthesis or post electrode fabrication, which severely limits the exposure of surface active sites. In this work, we report the synthesis of a self-supported 3D flower-like structure consisting of 2D α-Co(OH)2 nanosheets through a metal-organic-framework (MOF)-mediated synthetic method. We found that the formation of MOF intermediates can produce dispersive α-Co(OH)2 nanosheets with a stable 3D hierarchical structure which can effectively avoid the packing of individual nanosheets. The developed α-Co(OH)2 nanosheets exhibit an obviously enhanced OER activity in comparison with the nanosheets prepared with traditional method. The prepared α-Co(OH)2 nanosheets have been well characterized and their formation mechanism is proposed. Graphical abstract: