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Articles by Ewa Nowicka
Highly selective PdZn/ZnO catalysts for the methanol steam reforming reaction
One major drawback in the production of clean hydrogen from methanol is the formation of carbon monoxide which can subsequently act as a poison in fuel cell applications. Here we report on PdZn/ZnO catalysts developed for the methanol steam reforming reaction which have a high selectivity towards carbon dioxide.
New Insights into the Activation and Deactivation of Au/CeZrO4 in the Low-Temperature Water-Gas Shift Reaction
Gold on ceria-zirconia is an active catalyst for the low-temperature water-gas shift reaction (LTS), a key stage of upgrading H2 reformate streams for fuel cells. However, this catalyst rapidly deactivates and the mechanism remains unclear.
Multifunctional supported bimetallic catalysts for a cascade reaction with hydrogen auto transfer: synthesis of 4-phenylbutan-2-ones from 4-methoxybenzyl alcohols - Catalysis Science & Technology (RSC Publishing)
We report the one-pot tandem synthesis of 4-(4-methoxyphenyl)butan-2-one directly from 4-methoxybenzyl alcohol and acetone using a multifunctional supported AuPd nanoalloy catalyst. This one pot-synthesis involve dehydrogenation, aldol condensation and hydrogenation of C=C. In this supported AuPd catalyst, the bimetallic sites catalyse the dehydrogenation and hydrogenation steps and, in combination with the support, catalyse the C-C coupling (aldol) process.
The effect of ring size on the selective carboxylation of cycloalkene oxides
Carbon dioxide utilisation technology can contribute to the reduction of atmospheric CO levels both through its sequestration from flue gases and indirectly by relieving pressure on conventional feedstocks in chemical manufacturing. A promising approach is to employ CO to produce valuable cyclic carbonates (CCs) in reaction with suitable epoxides. This also has the advantage that carbon dioxide replaces toxic and hazardous reactants such as phosgene.
Tuning graphitic oxide for initiator- and metal-free aerobic epoxidation of linear alkenes
Initial studies were conducted using a partially oxidized GO prepared using a modified HO method, in which potassium chlorate (20 g per 5 g of graphite) was used (GO-HO20) in place of the standard 55 g per 5 g of graphite (GO-HO55) that is used in most preparations.
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