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Performance of a biomimetic oxidation catalyst immobilized on silica particles
Stockholm University, Faculty of Science, Department of Organic Chemistry.
Stockholm University, Faculty of Science, Department of Organic Chemistry.
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2013 (English)In: Journal of Catalysis, ISSN 0021-9517, E-ISSN 1090-2694, Vol. 303, 16-21 p.Article in journal (Refereed) Published
Abstract [en]

A biomimetic oxidation catalyst, cobalt porphyrin with thiol linkers, was chemically conjugated to silica particles and utilized in the oxidation of hydroquinone to benzoquinone. The cobalt porphyrin/silica particle catalyst was characterized with Inductively Coupled Plasma (ICP) and X-ray Photoelectron Spectroscopy (XPS). The catalytic performance of the cobalt porphyrin molecules was compared to previous results for the same catalyst grafted to a gold surface and on silicon wafers. The measured catalytic activity, after background correction, was 100 times higher than that of its homogeneous counterpart, 10 times higher than that on a silicon wafer, and almost the same as that on a gold surface. The turnover frequency rates after 400 h are still comparable with initial rates reported for homogeneous porphyrins and salophens, whereas the use of particles as support increases the active surface area, which removes the limitations for scale-up associated with the previously used silicon wafers and gold surfaces.

Place, publisher, year, edition, pages
2013. Vol. 303, 16-21 p.
Keyword [en]
Biomimetic, Catalysis, Cobalt porphyrin, Immobilization, Silica particles, X-ray Photoelectron Spectroscopy, Magnetic particles, Turnover number, Turnover frequency
National Category
Physical Chemistry Chemical Engineering
URN: urn:nbn:se:su:diva-92259DOI: 10.1016/j.jcat.2013.03.008ISI: 000320216600003OAI: diva2:638073
EU, European Research Council, AdG 247014Berzelii Centre EXSELENTSwedish Research Council


Available from: 2013-07-25 Created: 2013-07-25 Last updated: 2013-10-10Bibliographically approved

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Eriksson, KristoferBäckvall, Jan-E.
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