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  Dual-Templated Cobalt Oxide for Photochemical Water Oxidation

Deng, X., Bongard, H.-J., Chan, C. K., & Tüysüz, H. (2016). Dual-Templated Cobalt Oxide for Photochemical Water Oxidation. ChemSusChem, 9(4), 409-415. doi:10.1002/cssc.201500872.

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 Creators:
Deng, Xiaohui1, Author              
Bongard, Hans-Josef2, Author              
Chan, Candace K.3, Author
Tüysüz, Harun1, Author              
Affiliations:
1Research Group Tüysüz, Max-Planck-Institut für Kohlenforschung, Max Planck Society, ou_1950290              
2Service Department Lehmann (EMR), Max-Planck-Institut für Kohlenforschung, Max Planck Society, ou_1445625              
3Materials Science and Engineering, School for Engineering of Matter, Transport and Energy, Arizona State University, Tempe, AZ, USA, ou_persistent22              

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Free keywords: catalysis; cobalt oxide; endotemplating; exotemplating; water oxidation
 Abstract: Mesoporous Co3O4 was prepared using a dual templating approach whereby mesopores inside SiO2 nanospheres, as well as the void spaces between the nanospheres, were used as templates. The effect of calcination temperature on the crystallinity, morphology, and textural parameters of the Co3O4 replica was investigated. The catalytic activity of Co3O4 for photochemical water oxidation in a [Ru(bpy)3]2+[S2O 8 ]2− system was evaluated. The Co3O4 replica calcined at the lowest temperature (150 °C) exhibited the best performance as a result of the unique nanostructure and high surface area arising from the dual templating. The performance of Co3O4 with highest surface area was further examined in electrochemical water oxidation. Superior activity over high temperature counterpart and decent stability was observed. Furthermore, CoO with identical morphology was prepared from Co3O4 using an ethanol reduction method and a higher turnover-frequency number for photochemical water oxidation was obtained.

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Language(s): eng - English
 Dates: 2015-09-252016-02-19
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1002/cssc.201500872
 Degree: -

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Title: ChemSusChem
Source Genre: Journal
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Publ. Info: Weinheim : Wiley-VCH
Pages: - Volume / Issue: 9 (4) Sequence Number: - Start / End Page: 409 - 415 Identifier: ISSN: 1864-5631
CoNE: https://pure.mpg.de/cone/journals/resource/1864-5631