Design of Ordered Mesoporous Composite Materials and
Their Electrocatalytic Activities for Water Oxidation
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Abstract
The
controlled synthesis of a series of ordered mesoporous composite materials
via solid–solid reaction of ordered mesoporous Co<sub>3</sub>O<sub>4</sub> with various transition metal precursors is reported.
This versatile methodology allows preparation of a range of composites
with precisely controllable material compositions. The textural parameters
of the heterostructured compounds are highly dependent on the oxidation
state of the dopant. Electrocatalytic activities of the prepared materials
were investigated as oxygen evolution catalysts for the electrolysis
of water. Among the ordered mesoporous composite materials, Co<sub>3</sub>O<sub>4</sub>–CuCo<sub>2</sub>O<sub>4</sub> shows a
significant enhancement for electro-catalytic water splitting with
a lower onset potential and higher current density. Following these
results, a series of ordered mesoporous composite materials based
on cobalt and copper oxides with different atomic ratios were prepared
through a nanocasting route. Enhanced electrocatalytic performance
was obtained for all composite samples in comparison with Co<sub>3</sub>O<sub>4</sub>
