ChemSusChem

Cover image for Vol. 7 Issue 8

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

Impact Factor: 7.117

ISI Journal Citation Reports © Ranking: 2013: 17/148 (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

7_08/2014Cover Picture: Catalytic Depolymerization of Lignin in Supercritical Ethanol (ChemSusChem 8/2014)

The Front Cover image shows a single-step process that effectively depolymerizes lignin in supercritical ethanol using an inexpensive CuMgAlOx catalyst. Ethanol not only acts as a hydrogen-donor solvent but also as a capping agent, which can stabilize the highly reactive phenolic intermediates either by O-alkylation of hydroxyl groups or by C-alkylation of the aromatic rings, thus essentially inhibiting repolymerization reactions. High monomer yield can be obtained without char formation. The monomeric products can be used as fuel additives or chemicals. More details can be found in the Full Paper by Hensen et al. on page 2276 (DOI: 10.1002/cssc.201402094), while more information about the research group is available in the Cover Profile (DOI: 10.1002/cssc.201402665).

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7_08i/2014Inside Cover: Vertical Distribution of Overpotentials and Irreversible Charge Losses in Lithium Ion Battery Electrodes (ChemSusChem 8/2014)

The Inside Cover illustrates the electrochemical sieving effect in porous graphite electrodes for lithium-ion batteries, which appears during the first charge. Limitations in mass transport result in a reduction of contaminants and additives preferentially at the negative electrode surface close to the separator. The electrochemical intercalation of lithium in graphite occurs in a layer-by-layer process due to the depletion of lithium from the solution and formation of concentration overpotential, which slow down the reaction in the bottom layers. The cross-current density distribution becomes broader during the intercalation and deintercalation processes. More details can be found in the Full Paper by La Mantia et al. on page 2159 (DOI: 10.1002/cssc.201400056).

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7_08c/2014Inside Back Cover: Synergistic Fusion of Vertical Graphene Nanosheets and Carbon Nanotubes for High-Performance Supercapacitor Electrodes (ChemSusChem 8/2014)

The Inside Back Cover shows the synergistic integration of highly porous micropatterns of vertically aligned graphenes and carbon nanotubes and their application for high-performance supercapacitor electrodes. This is achieved by fusing the carbon nanotubes in the basal plane of the vertical graphenes, which was synthesized from natural precursors by using an environmentally benign plasma process. The high electrochemical activity of the edge plane is retained, and the relatively inactive basal planes are filled with highly conducting carbon nanotubes. This combination of interconnected nanostructures substantially enhances the supercapacitor performance, thus making hybrid multidimensional nanoarchitectures promising energy storage devices for the future. More details can be found in the Full Paper by Han et al. on page 2317 (DOI: 10.1002/cssc.201402045).

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7_08b/2014Back Cover: New Hydrogen-Evolution Heteronanostructured Photocatalysts: Pt-Nb3O7(OH) and Cu-Nb3O7(OH) (ChemSusChem 8/2014)

The Back Cover picture illustrates the performance of Nb3O7(OH), a new hydrogen evolution photocatalyst: Under solar illumination, photogenerated holes are scavenged by methanol while the reduction of protons to hydrogen is kinetically hindered. Thus, the electrons remain in the conduction band and/or trap states, turning the photocatalyst deep blue. The deposition of metal particles on the surface introduces a new reaction side, which now is able to overcome the kinetic barrier. Subsequently, hydrogen is formed and no photochromic process is observed. More details can be found in the Communication by Hmadeh et al. on page 2104 (DOI: 10.1002/cssc.201402173).

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