ChemSusChem

Cover image for Vol. 8 Issue 12

Editor-in-Chief: Guido Kemeling; Editorial Board Chairs: Matthias Beller, Gabriele Centi, Licheng Sun

Impact Factor: 7.657

ISI Journal Citation Reports © Ranking: 2014: 18/157 (Chemistry Multidisciplinary)

Online ISSN: 1864-564X

Associated Title(s): Angewandte Chemie International Edition, Chemistry - A European Journal, Chemistry – An Asian Journal, ChemCatChem, ChemElectroChem, ChemPhysChem, Energy Technology

8_12/2015Cover Picture: Hydrogen Production from Aqueous Solutions of Urea with Ruthenium-based Catalysts (ChemSusChem 12/2015)

The Cover picture shows that urea molecules can be effectively converted into H2, N2, and CO2 in the presence of water and Ru/Al2O3 as catalyst. This highly efficient catalytic system produces hydrogen with high yield (92 %) at 500 °C utilizing hydrogen atoms from water as well as urea. The aqueous urea solution is essentially non-toxic, easy to handle, and has a sufficient hydrogen content of 8 wt %. This catalytic system can be a promising alternative to the existing hydrogen production systems based on chemical H2 carriers such as ammonia, hydrazine, and organic hydrides. A mechanistic study suggested that the reaction proceeds mainly via two steps: urea hydrolysis followed by NH3 decomposition. More details can be found in the Communication by Furukawa et al. (DOI: 10.1002/cssc.201500112).

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8_12i/2015Inside Cover: Liquid-Phase Catalytic Transfer Hydrogenation of Furfural over Homogeneous Lewis Acid–Ru/C Catalysts (ChemSusChem 12/2015)

The Inside Cover picture demonstrates the synergy of supported metal catalysts and Lewis acid homogeneous metal chlorides in driving the hydrogenolysis of biomass derivatives into valuable fuel additives and chemicals. Strong evidence points towards Lewis acids being mainly responsible for the hydrogenation of furfural to furfural alcohol, whereas the synergy of the Lewis acid/metal catalyst on the molecular level drives the hydrogenolysis of furfural alcohol to 2-methylfuran. More details can be found in the Full Paper by Panagiotopoulou et al. (DOI: 10.1002/cssc.201500212).

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8_12c/2015Inside Back Cover: Highly Efficient Oxygen-Storage Material with Intrinsic Coke Resistance for Chemical Looping Combustion-Based CO2 Capture (ChemSusChem 12/2015)

The Inside Back Cover picture shows schematically the so-called chemical looping combustion scheme, which is an emerging carbon dioxide capture process. Here, methane reacts with copper oxide, the oxygen carrier, to form carbon dioxide and steam. After condensation of steam, a pure stream of carbon dioxide is obtained ready for compression and sequestration or further utilization. The reduced copper oxide is regenerated to its initial state using air. More details can be found in the Full Paper by Imtiaz et al. (DOI: 10.1002/cssc.201403426).

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8_12b/2015Back Cover: Recyclable Bifunctional Polystyrene and Silica Gel-Supported Organocatalyst for the Coupling of CO2 with Epoxides (ChemSusChem 12/2015)

The Back Cover picture shows a bifunctional ammonium salt covalently bound to a silica support catalyzing the addition of carbon dioxide to epoxides under solvent-free conditions. The catalysts can be easily recovered by simple filtration after the reaction and reused in up to 13 consecutive runs with retention of high activity and selectivity even at 90 °C. The scope and limitations of the reaction have been evaluated in terms of reaction conditions and substrate scope. More details can be found in the Communication by Kohrt and Werner (DOI: 10.1002/cssc.201500128).

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