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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. Distinctive Potential Behavior at the Oxidized Surface of a Semiconductor Device in a Concentrated Aqueous Salt Solution

    Yuki Maekawa, Prof. Yasushi Shibuta and Prof. Toshiya Sakata

    Article first published online: 22 JUL 2014 | DOI: 10.1002/celc.201402069

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    Concentrate on the potential! The unique potential behavior of a semiconductor-based ion sensor in concentrated aqueous NaCl solutions was found experimentally by using an on silico technique. These results were supported by in silico simulations, which enabled the identification of specific interfacial properties resulting from the spatial separation of ions and the hydration of ions, and the continuous shift of the potential profile based on ionic charges near the interface.

  2. Mechanistic Switching by Hydronium Ion Activity for Hydrogen Evolution and Oxidation over Polycrystalline Platinum Disk and Platinum/Carbon Electrodes

    Tatsuya Shinagawa, Angel T. Garcia-Esparza and Prof. Kazuhiro Takanabe

    Article first published online: 22 JUL 2014 | DOI: 10.1002/celc.201402085

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    pH matters: A comprehensive study of pH effects on the kinetics of hydrogen evolution and oxidation reactions (HER/HOR) using a polycrystalline Pt electrocatalyst, combined with microkinetic simulations, reveals that not only the activity, but also the reaction mechanism and rate-determining step can be altered. As a result, the apparently pH-dependent electrocatalysis is classified into acidic, neutral, and alkaline conditions.

  3. Electrodeposition of Zinc Nanorods from Ionic Liquid into Porous Anodic Alumina

    Maksim Starykevich, Aleksey D. Lisenkov, Dr. Andrei N. Salak, Prof. Mario G. S. Ferreira and Prof. Mikhail L. Zheludkevich

    Article first published online: 22 JUL 2014 | DOI: 10.1002/celc.201402130

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    Full-fillment in spite of barrier: 1D zinc nanowires are successfully obtained through two-step electrodeposition from ionic liquid into the porous anodic alumina template, without removing the barrier layer. Predeposition of metal at the bottom of the pores is carried out in alternating-current mode, followed by uniform filling of the pores in a galvanostatic regime (see picture).

  4. Discovery of New Oxygen Evolution Reaction Electrocatalysts by Combinatorial Investigation of the Ni–La–Co–Ce Oxide Composition Space

    Dr. Joel A. Haber, Dan Guevarra, Dr. Suho Jung, Dr. Jian Jin and Dr. John M. Gregoire

    Article first published online: 22 JUL 2014 | DOI: 10.1002/celc.201402149

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    Hit it again: A new Ce-rich family of active oxygen evolution reaction (OER) catalysts composed of earth-abundant elements, discovered using high-throughput methods, is reported. The addition of 20–65 % CeOx to previously investigated Ni–La–Co oxides produces new catalysts with increased electrocatalytic activity.

  5. Electrochemical Activation of Carbon–Halogen Bonds: Electrocatalysis at Palladium–Copper Nanoparticles

    Dr. Christian Durante, Valentina Perazzolo, Dr. Abdirisak Ahmed Isse, Marco Favaro, Prof. Gaetano Granozzi and Prof. Armando Gennaro

    Article first published online: 17 JUL 2014 | DOI: 10.1002/celc.201402032

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    Live at the Palladium: Palladised Cu nanoparticles with low Pd content are deposited on glassy carbon and tested for the catalytic reduction of C[BOND]Cl bonds in DMF and DMF/H2O (3:1 v/v). The electrodes show good electrocatalytic activities in both media and the presence of H2O does not reduce the stability of the nanoparticles, instead it remarkably enhances catalysis.