Issue 6, 2014
From the journal:

Nanoscale

Hierarchical cobalt-based hydroxide microspheres for water oxidation

Ye Zhang,a   Bai Cui,c   Olivia Derr,d   Zhibo Yao,a   Zhaotong Qin,a   Xiangyun Deng,b   Jianbao Liab  and  Hong Lin*a  

* Corresponding authors

a State Key Laboratory of New Ceramics & Fine Processing, Department of Materials Science and Engineering, Tsinghua University, Beijing 100084, P.R. China
E-mail: hong-lin@tsinghua.edu.cn
Fax: +86-10-6277-2672
Tel: +86-010-6277-2848

b Key Laboratory of Ministry of Education for Advanced Materials in Tropical Island Resources, Hainan University, Haikou, China

c Department of Materials Science and Engineering, University of Illinois at Urbana-Champaign, 1304 W. Green Street, Urbana, IL 61801, USA

d Rice Department of Materials Science and Nanoengineering, Rice University, Houston, Texas 77005, USA

Abstract

3D hierarchical cobalt hydroxide carbonate hydrate (Co(CO3)0.5(OH)ยท0.11H2O) 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.

Graphical abstract: Hierarchical cobalt-based hydroxide microspheres for water oxidation

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Article information

DOI
https://doi.org/10.1039/C3NR05193E
Article type
Paper
Submitted
29 Sep 2013
Accepted
15 Dec 2013
First published
14 Feb 2014

Nanoscale, 2014,6, 3376-3383

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Hierarchical cobalt-based hydroxide microspheres for water oxidation

Y. Zhang, B. Cui, O. Derr, Z. Yao, Z. Qin, X. Deng, J. Li and H. Lin, Nanoscale, 2014, 6, 3376 DOI: 10.1039/C3NR05193E

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