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100 1 _ |a Djinović, Petar
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245 _ _ |a Synergistic effect of CuO nanocrystals and Cu-oxo-Fe clusters on silica support in promotion of total catalytic oxidation of toluene as a model volatile organic air pollutant
260 _ _ |a Amsterdam
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520 _ _ |a Monometallic (CuO and FeO$_x$) and bimetallic (CuFeO$_x$) entities on different supports are promising transition-metal low-cost catalysts for catalytic oxidation of volatile organic compounds (VOC) from industrial air alternatively to noble-metal catalysts which are currently in use. In this work we report for the first time that the promotion of catalytic oxidation of toluene as a model VOC is due to the cooperative redox effect between CuO nanocrystals and finely dispersed Cu-oxo-Fe clusters on mesoporous silica with defined Fe/Cu molar ratio. This increases the number and reactivity of adsorbed electrophilic (O$^−$ and O$_2^−$) as well as nucleophilic lattice oxygen (O$^{2-}$) species at the CuO crystal and and Cu-oxo-Fe cluster interface, thus providing up to twofold enhancement in catalytic activity for total oxidation of toluene. Catalysts were prepared via direct synthesis of Fe-functionalized disordered mesoporous silica containing only isolated iron sites followed by copper addition via impregnation.
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700 1 _ |a Ristić, Alenka
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700 1 _ |a Žumbar, Tadej
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700 1 _ |a Dasireddy, Venkata D. B. C.
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700 1 _ |a Rangus, Mojca
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700 1 _ |a Dražić, Goran
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700 1 _ |a Popova, Margarita
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700 1 _ |a Likozar, Blaž
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700 1 _ |a Zabukovec Logar, Nataša
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700 1 _ |a Novak Tušar, Nataša
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773 _ _ |a 10.1016/j.apcatb.2020.118749
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