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July 15, 2014

ChemElectroChem 07/2014: Materials and Methods

ChemElectroChem 07/2014: Materials and MethodsIssue 7 contains a mixture of reviews, full papers, and communications covering very different areas in electrochemistry. In a Review, B. Van der Bruggen and colleagues describe "electrokinetic remediation" as a suitable technique for the restoration of saline soil and the control of seawater intrusion. In the Articles section, J. Roncali and co-workers report on the production of nanostructured conjugated polymers by electropolymerization of tailored tetrahedral precursors, and D. S. Silvester, D. W. M. Arrigan et al. present their results on the electrochemical characterization of an oleyl-coated magnetite nanoparticle-modified electrode. The Communication by P. Schmuki and colleagues shows that controlled thermal annealing can tune the photoelectrochemical properties of nanochanneled tin-oxide structures.

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  1. Effect of Multi-Walled Carbon Nanotubes on Glucose Oxidation by Glucose Oxidase or a Flavin-Dependent Glucose Dehydrogenase in Redox-Polymer-Mediated Enzymatic Fuel Cell Anodes

    Isioma Osadebe and Prof. Dónal Leech

    Article first published online: 1 AUG 2014 | DOI: 10.1002/celc.201402136

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    Lending support: The use of multi-walled carbon nanotubes increases catalysis of glucose oxidation by glucose oxidase or flavin-dependent glucose dehydrogenase in redox-polymer-mediated enzymatic fuel cell anodes to yield a current density of 1.1 mA cm−2 in a physiologically relevant 5 mM glucose solution.

  2. Asymmetric Modification of TiO2 Nanofibers with Gold by Electric-Field-Assisted Photochemistry

    Dr. Michael Ongaro, Dr. Jerôme Roche, Prof. Alexander Kuhn and Prof. Paolo Ugo

    Article first published online: 31 JUL 2014 | DOI: 10.1002/celc.201402161

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    Directing charge carriers: Highly site-selective metal deposition on semiconductor nanofibers is achieved based on a synergetic effect when combining UV irradiation and strong electric fields. This leads in a straightforward way to metal/semiconductor Janus objects. With this approach, TiO2 nanofibers are anisotropically functionalised depositing gold only at one tip of each fiber.

  3. Long-Term Performance of Chemically and Physically Modified Activated Carbons in Air Cathodes of Microbial Fuel Cells

    Dr. Xiaoyuan Zhang, Dr. Deepak Pant, Dr. Fang Zhang, Dr. Jia Liu, Weihua He and Prof. Bruce E. Logan

    Article first published online: 31 JUL 2014 | DOI: 10.1002/celc.201402123

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    Cathode longevity: Modified activated carbon (AC) cathodes enhance performances compared with plain AC cathodes in microbial fuel cells. These AC-based cathodes sustain high power densities over 17 months, and have much better durablity than Pt-catalyst cathodes. Soaking the AC-based cathodes in a weak hydrochloric acid solution is an effective method to restore performance to >85 % of the original level.

  4. The Influence of Anion–Cation Combinations on the Physicochemical Properties of Advanced Electrolytes for Supercapacitors and the Capacitance of Activated Carbons

    Sebastian Pohlmann, Ruben-Simon Kühnel, Dr. Teresa A. Centeno and Dr. Andrea Balducci

    Article first published online: 31 JUL 2014 | DOI: 10.1002/celc.201402091

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    Optimum selection: The operating voltage of propylene carbonate based electrolytes is strongly dependent on the chosen conductive salt, and the change in ion size has a large influence on the electrolyte–carbon interface (see picture).

  5. Biotemplated Palladium Catalysts Can Be Stabilized on Different Support Materials

    Dr. Matthew D. Yates and Prof. Bruce E. Logan

    Article first published online: 30 JUL 2014 | DOI: 10.1002/celc.201402124

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    Sustainable electrode fabrication: The biotemplated synthesis of catalytic porous electrodes is a sustainable process and, according to the results of durability tests under electrochemical and mechanical stress, these electrodes (e.g. the Pd/carbon paper electrode shown in the picture) are durable enough to replace catalytic electrodes based on synthetic materials in certain applications.