Synthesis of Co-containing mesoporous carbon foams using a new cobalt-oxo cluster as a precursor

Journal Article · Sun Jan 15 04:00:00 EST 2012 · Journal of Solid State Chemistry

OSTI ID:21612872

Yaokang, Lv ^[1]; Yunlong, Feng ^[2]; Mingxian, Liu; Liang, Xu; Cao, Liu; Haowen, Zheng; Jie, Li ^[1]

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1. Department of Chemistry, Tongji University, 1239 Siping Road, Shanghai 200092 (China)
2. Zhejiang Key Laboratory for Reactive Chemistry on Solid Surfaces, Institute of Physical Chemistry, Zhejiang Normal University, Jinhua, Zhejiang 321004 (China)

A novel trinuclear cobalt-oxo cluster 2[Co{sub 3}O(Ac){sub 6}(H{sub 2}O){sub 3}]{center_dot}H{sub 2}O (Co-OXO) has been obtained and characterized by X-ray single-crystal diffraction and elemental analysis. The structure of Co-OXO displays 3D supramolecular networks through hydrogen bonds and generates boron nitride (bnn) topology. Co-OXO was further used as a precursor to synthesize Co-containing mesoporous carbon foams (Co-MCFs), which exhibit highly ordered mesostructure with specific surface area of 614 m{sup 2} g{sup -1} and uniform pore size of 2.7 nm. Charge-discharge tests show that the specific discharge capacitance of Co-MCFs is 7% higher than that of the MCFs at the current density of 100 mA g{sup -1}, and 26% higher than that of MCFs at the current density of 3 A g{sup -1}. The electrochemical behaviors of Co-MCFs are obviously improved due to the improved wettability, increased graphitization degree and the pseudo-capacitance through additional faradic reactions arising from cobalt. - Graphical Abstract: A new trinuclear cobalt-oxo cluster, 2[Co{sub 3}O(Ac){sub 6}(H{sub 2}O){sub 3}]{center_dot}H{sub 2}O (1), was obtained and further used as a precursor to synthesize Co-containing mesoporous carbon foams (Co-MCFs) which exhibit improved electrochemical behaviors. Highlights: Black-Right-Pointing-Pointer A new trinuclear cobalt-oxo cluster (1) were obtained. Black-Right-Pointing-Pointer 1 is joined by hydrogen bonds to construct a 3D structure showing bnn topology. Black-Right-Pointing-Pointer 1 was further used to obtain Co-containing mesoporous carbon foams (Co-MCFs). Black-Right-Pointing-Pointer Co-MCFs exhibit highly ordered mesostructure and uniform pore sizes. Black-Right-Pointing-Pointer Electrochemical behaviors of Co-MCFs are obviously improved compared with pure MCFs.

• OSTI ID: 21612872
• Journal Information: Journal of Solid State Chemistry, Journal Name: Journal of Solid State Chemistry Vol. 185; ISSN 0022-4596; ISSN JSSCBI
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
BORON COMPOUNDS
BORON NITRIDES
CARBON
CHEMISTRY
COBALT
COHERENT SCATTERING
COLLOIDS
CRYSTALS
DIFFRACTION
DISPERSIONS
ELECTROCHEMISTRY
ELEMENTS
FOAMS
GRAPHITIZATION
HYDROGEN
HYDROGEN COMPOUNDS
MATHEMATICS
METALS
MONOCRYSTALS
NANOSTRUCTURES
NITRIDES
NITROGEN COMPOUNDS
NONMETALS
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
PNICTIDES
PRECURSOR
SCATTERING
SPECIFIC SURFACE AREA
SYNTHESIS
TOPOLOGY
TRANSITION ELEMENTS
VOLTAMETRY
WATER
WETTABILITY
X-RAY DIFFRACTION