Journal
CHEMISTRY OF MATERIALS
Volume 25, Issue 24, Pages 4926-4935Publisher
AMER CHEMICAL SOC
DOI: 10.1021/cm403153u
Keywords
ordered mesoporous materials; nanocasting; mixed oxides; water oxidation
Funding
- TEM department for SEM images and EDS analysis in addition
- Fonds der Chemischen Industrie (FCI)
- FCI
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The controlled synthesis of a series of ordered mesoporous composite materials via solid-solid reaction of ordered mesoporous Co3O4 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, Co3O4-CuCo2O4 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 Co3O4.
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