Reference : Study of photocatalytic decomposition of hydrogen peroxide over ramsdellite-MnO2 by O2-p...
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Chemistry
Engineering, computing & technology : Chemical engineering
Engineering, computing & technology : Materials science & engineering
http://hdl.handle.net/2268/112093
Study of photocatalytic decomposition of hydrogen peroxide over ramsdellite-MnO2 by O2-pressure monitoring
English
Páez Martínez, Carlos mailto [Université de Liège - ULg > Département de chimie appliquée > Génie chimique - Génie catalytique >]
Liquet, Dimitri mailto [Université de Liège - ULg > > > Doct. sc. ingé. (chim. appl. - Bologne)]
Calberg, Cédric mailto [Université de Liège - ULg > Département de chimie appliquée > Génie chimique - Génie catalytique >]
Lambert, Stéphanie mailto [Université de Liège - ULg > Département de chimie appliquée > Génie chimique - Génie catalytique >]
Willems, Isabelle mailto [Prayon s.a. > > > >]
Germeau, Alain mailto [Prayon s.a. > > > >]
Pirard, Jean-Paul mailto [Université de Liège - ULg > Département de chimie appliquée > Génie chimique - Génie catalytique >]
Heinrichs, Benoît mailto [Université de Liège - ULg > Département de chimie appliquée > Génie chimique - Nanomatériaux et interfaces >]
2011
Catalysis Communications
Elsevier Science
15
132-136
Yes (verified by ORBi)
International
1566-7367
Amsterdam
The Netherlands
[en] Manganese dioxide ; Hydrogen peroxide decomposition ; Photocatalytic activity
[en] The catalytic and photocatalytic activities of ramsdellite type manganese oxide, R-MnO2 were studied from the initial rate of decomposition of H2O2 in aqueous solution. The kinetic study was followed by the production of O2 via gas pressure monitoring (O2-monitored method), in the dark and under visible light irradiation (λ≥400 nm), at 20 °C. Experimental data showed that the rate of H2O2 decomposition, under visible light irradiation and in the dark, obeys the first order kinetic law.While in the dark the H2O2 decomposition rate bymass unit was around 6.88 mmol g−1 s−1, under visible light irradiation theH2O2 decomposition rate achieved a maximal value of 15.13 mmol g−1 s−1. The increase in the H2O2 decomposition, by effect of the visible light, was observed in ranges of catalyst concentrations from 16 to 374 mg L−1. These results reflect the potential of R-MnO2 as a photoactive catalyst, being a consequence of presumed photoreduction of Mn4+centers.
Fonds de la Recherche Scientifique (Communauté française de Belgique) - F.R.S.-FNRS ; Fonds de la Recherche Fondamentale Collective - FRFC ; Ministère de la Région Wallonne ; Belgian Interuniversity Attraction Pole INANOMAT (IAP-P6/17)
http://hdl.handle.net/2268/112093
10.1016/j.catcom.2011.08.025

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