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<identifier>oai:HAL:hal-01683204v1</identifier>
<datestamp>2018-01-16</datestamp>
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<setSpec>subject:chim</setSpec>
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<metadata><dc>
<publisher>HAL CCSD</publisher>
<title lang=en>Tailoring the oxidation state of cobalt through halide functionality in sol-gel silica</title>
<creator>Olguin, Gianni</creator>
<creator>Yacou, Christelle</creator>
<creator>Smart, Simon</creator>
<creator>Diniz da Costa, João C.</creator>
<contributor>University of Queensland [Brisbane]</contributor>
<contributor>Chimie des Matériaux - Connaissance et Valorisation (COVACHIMM) ; Université des Antilles et de la Guyane (UAG)</contributor>
<contributor>The University of Queensland, FIM2Lab – Functional Interfacial Materials and Membrane Laboratory, School of Chemical Engineering, Brisbane, QLD 4067, Australia (FIM2Lab) ; University of Queensland [Brisbane]</contributor>
<description>International audience</description>
<source>ISSN: 2045-2322</source>
<source>EISSN: 2045-2322</source>
<source>Scientific Reports</source>
<publisher>Nature Publishing Group</publisher>
<identifier>hal-01683204</identifier>
<identifier>https://hal.univ-antilles.fr/hal-01683204</identifier>
<source>https://hal.univ-antilles.fr/hal-01683204</source>
<source>Scientific Reports, Nature Publishing Group, 2013, 3 (1), 〈10.1038/srep02449〉</source>
<identifier>DOI : 10.1038/srep02449</identifier>
<relation>info:eu-repo/semantics/altIdentifier/doi/10.1038/srep02449</relation>
<language>en</language>
<subject>[CHIM.MATE] Chemical Sciences/Material chemistry</subject>
<subject>[CHIM.GENI] Chemical Sciences/Chemical engineering</subject>
<type>info:eu-repo/semantics/article</type>
<type>Journal articles</type>
<description lang=en>Abstract The functionality or oxidation state of cobalt within a silica matrix can be tailored through the use of cationic surfactants and their halide counter ions during the sol-gel synthesis. Simply by adding surfactant we could significantly increase the amount of cobalt existing as Co3O4 within the silica from 44% to 77%, without varying the cobalt precursor concentration. However, once the surfactant to cobalt ratio exceeded 1, further addition resulted in an inhibitory mechanism whereby the altered pyrolysis of the surfactant decreased Co3O4 production. These findings have significant implications for the production of cobalt/silica composites where maximizing the functional Co3O4 phase remains the goal for a broad range of catalytic, sensing and materials applications.</description>
<date>2013-12</date>
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