title: Hierarchical cobalt-based hydroxide microspheres for water oxidation.
abstract: 3D hierarchical cobalt hydroxide carbonate hydrate (Co(CO3)0.5(OH)·0.11H2O) has been synthesized featuring a hollow urchin-like structure by a one-step hydrothermal method at modest temperature on FTO glass substrates. The functionalities of precursor surfactants were isolated and analyzed. A plausible formation mechanism of the spherical urchin-like microclusters has been furnished through time-dependent investigations. Introduction of other transitional metal doping (Cu, Ni) would give rise to a substantial morphological change associated with a surface area drop. The directly grown cobalt-based hydroxide composite electrodes were found to be capable of catalyzing oxygen evolution reaction (OER) under both neutral pH and alkaline conditions. The favorable 3D dendritic morphology and porous structure provide large surface areas and possible defect sites that are likely responsible for their robust electrochemical activity.
authors: State Key Laboratory of New Ceramics & Fine Processing, Department of Materials Science and Engineering, Tsinghua University, Beijing 100084, P.R. China. hong-lin@tsinghua.edu.cn.
authors: Ye
authors: Y
authors: Zhang
authors: Bai
authors: B
authors: Cui
authors: Olivia
authors: O
authors: Derr
authors: Zhibo
authors: Z
authors: Yao
authors: Zhaotong
authors: Z
authors: Qin
authors: Xiangyun
authors: X
authors: Deng
authors: Jianbao
authors: J
authors: Li
authors: Hong
authors: H
authors: Lin
mesh_terms: D003035:Cobalt / Q000737:chemistry*; D055664:Electrochemical Techniques; D006863:Hydrogen-Ion Concentration; D006878:Hydroxides / Q000737:chemistry*; D008863:Microspheres; D049329:Nanostructures / Q000737:chemistry; D010084:Oxidation-Reduction; D014867:Water / Q000737:chemistry*
chemical_list: D006878:Hydroxides; C518276:cobalt hydroxide; D014867:Water; D003035:Cobalt