ChemElectroChem

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Early View (Online Version of Record published before inclusion in an issue)

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  1. Articles

    1. Exceptional Activity of a Pt–Rh–Ni Ternary Nanostructured Catalyst for the Electrochemical Oxidation of Ethanol

      Nina Erini, Stefan Rudi, Vera Beermann, Paul Krause, Prof. Ruizhi Yang, Prof. Yunhui Huang and Prof. Peter Strasser

      Article first published online: 25 FEB 2015 | DOI: 10.1002/celc.201402390

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      A perfect match? Platinum, rhodium, and nickel are combined to create a novel electrocatalyst with activity towards ethanol oxidation in alkaline and acidic media, supporting the notion that surface NiOx is an excellent oxygenate-supplying catalyst component for the complete oxidation of ethanol (see picture).

    2. You have full text access to this OnlineOpen article
      Ferrocene-Boronic Acid–Fructose Binding Based on Dual-Plate Generator–Collector Voltammetry and Square-Wave Voltammetry

      Meng Li, Dr. Su-Ying Xu, Dr. Andrew J. Gross, Jules L. Hammond, Dr. Pedro Estrela, James Weber, Dr. Karel Lacina, Prof. Tony D. James and Prof. Frank Marken

      Article first published online: 25 FEB 2015 | DOI: 10.1002/celc.201500016

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      Smile and wave: Ferrocene-boronic acid binding to fructose is quantified under steady-state conditions in a micro-trench and under transient conditions with square-wave voltammetry.

    3. Use of Anodic TiO2 Nanotube Layers as Mesoporous Scaffolds for Fabricating CH3NH3PbI3 Perovskite-Based Solid-State Solar Cells

      Dr. Raul Salazar, Dr. Marco Altomare, Dr. Kiyoung Lee, Dr. Jyotsna Tripathy, Dr. Robin Kirchgeorg, Nhat Truong Nguyen, Prof. Dr. Mohamed Mokhtar, Prof. Dr. Abdelmohsen Alshehri, Prof. Dr. Shaeel A. Al-Thabaiti and Prof. Dr. Patrik Schmuki

      Article first published online: 25 FEB 2015 | DOI: 10.1002/celc.201500031

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      Complete conformal filling! An optimized perovskite spin-coating leads to interdigitated perovskite structures conformally deposited within anodic TiO2 nanotube scaffolds. These assemblies are used as hole-transporting-material-free solid-state solar cells. Complete filling of the scaffolds with the perovskite greatly improves the solar cell efficiency.

    4. In Situ-Formed, Amorphous, Oxygen-Enabled Germanium Anode with Robust Cycle Life for Reversible Lithium Storage

      Xiaolei Sun, Dr. Wenping Si, Lixia Xi, Bo Liu, Xuejun Liu, Prof. Chenglin Yan and Prof. Oliver G. Schmidt

      Article first published online: 23 FEB 2015 | DOI: 10.1002/celc.201402404

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      Ge whizz: An oxygen-enabled germanium anode for lithium-ion batteries is obtained for the first time through the local electron-stimulated reaction of oxygen molecules with gaseous germanium. Benefiting from the incorporation of oxygen atoms, the oxygen-enabled electrodes exhibit remarkably improved electrochemical properties of highly reversible lithium-storage capacity (≈1200 mAh g−1), superior rate capability, and robust cycling performance.

  2. Highlights

    1. Metal–Organic Frameworks: New Interlayer Dielectric Materials

      Muhammad Usman, Dr. Shruti Mendiratta and Prof. Kuang-Lieh Lu

      Article first published online: 20 FEB 2015 | DOI: 10.1002/celc.201402456

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      New recruits: Metal–organic frameworks (MOFs) represent ideal replacements as interlayer dielectric (ILD) materials, owing to their low dielectric constant, low leakage current, tunable structural properties, and thermal/mechanical stability. Reported theoretical and experimental results will provide an effective pathway for advanced research on the potential applications of MOFs as ILD materials in an integrated circuit.

  3. Reviews

    1. Counter Electrodes for Quantum-Dot-Sensitized Solar Cells

      Insung Hwang and Prof. Dr. Kijung Yong

      Article first published online: 20 FEB 2015 | DOI: 10.1002/celc.201402405

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      See dot run: To suggest a breakthrough in the currently stagnant research field of quantum-dot-sensitized solar cells (QDSSCs), counter electrodes (CEs) for QDSSCs are intensively discussed in this Review article. Analytical tools for counter electrodes are introduced. Also, various types of counter electrodes are covered, including noble metals, metal sulfides, carbon derivatives, conducting polymers, and combinations of them.

  4. Articles

    1. Mycotoxin Aptasensing Amplification by using Inherently Electroactive Graphene-Oxide Nanoplatelet Labels

      Adeline Huiling Loo, Dr. Alessandra Bonanni and Prof. Martin Pumera

      Article first published online: 18 FEB 2015 | DOI: 10.1002/celc.201402403

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      How apt! An electrochemical aptasensor for ochratoxin A is proposed by utilizing graphene oxide nanoplatelets as electroactive labels.

    2. Contrasts between Single nanoparticle and Ensemble Electron Transfer: Oxidation and Reduction of DPPH Nanoparticles in Aqueous Media

      Xiaofei Zhou, Dr. Wei Cheng and Prof. Dr. Richard G. Compton

      Article first published online: 17 FEB 2015 | DOI: 10.1002/celc.201402446

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      Singles′ party: Complete oxidation of individual DPPH nanoparticles is inferred, with electron transfer kinetics analysed via Butler–Volmer analysis of single nanoparticle impacts. The reduction of DPPH nanoparticles quantitatively suggests a partial reduction process, likely leading to formation of DPPH/reduced DPPH core–shell nanoparticles. The single nanoparticle measurements can provide information absent in cyclic voltammetry of ensembles.

    3. Bone-Targeted Cisplatin-Complexed Poly(γ-benzyl-L-glutamate)–Poly(glutamic acid) Block Polymer Nanoparticles: An Electrochemical Approach

      Dr. Laura de Miguel, Dr. Gerardo Cebrián-Torrejón, Dr. Eric Caudron, Dr. Ludovica Arpinati, Prof. Dr. Antonio Doménech-Carbó and Prof. Dr. Gilles Ponchel

      Article first published online: 16 FEB 2015 | DOI: 10.1002/celc.201402400

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      Polymer pills: Complexes of cisplatin with nanoparticles derived from carboxylate-containing polymers are studied by using electrochemical methods and atomic absorption spectroscopy. Nanoparticles of varying compositions of copolymers are synthesized, characterized, and the association and dissociation of cisplatin is evaluated as a model of drug release. The binding of dansyl-labeled nanoparticles to hydroxyapatite, to simulate bone targeting in vivo is also studied by using fluorescence measurements.

    4. Electrochemical Conversion of Dichloroacetic Acid to Chloroacetic Acid in a Microfluidic Stack and in a Series of Microfluidic Reactors

      Prof. Dr. Onofrio Scialdone, Prof. Dr. Alessandro Galia, Dr. Simona Sabatino, Dr. Domenico Mira and Prof. Dr. Christian Amatore

      Article first published online: 16 FEB 2015 | DOI: 10.1002/celc.201402454

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      First stack ′em then line ′em up: Electrochemical synthesis of chloracetic acid is performed with microreactors in series under a single-pass mode without supporting electrolyte at low cell voltages. An increase of the productivity is achieved by using a stack with two or three electrode chambers in series. The utilization of three microreactors in series gives the opportunity to modulate the current density among the reactors to optimize the process.

    5. Morphology and Phase Evolution of CoAl Layered Double Hydroxides in an Alkaline Environment with Enhanced Pseudocapacitive Performance

      Tianhao Xu, Xiaochao Wu, Yingjie Li, Wenwen Xu, Dr. Zhiyi Lu, Yaping Li, Xiaodong Lei and Prof. Xiaoming Sun

      Article first published online: 13 FEB 2015 | DOI: 10.1002/celc.201500005

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      CoAl powered: The morphology and phase transformation of CoAl layered double hydroxide (CAL) nanoplates are systematically investigated in highly concentrated basic solution. CALs are gradually converted to β-Co(OH)2 and CoOOH and, simultaneously, the nanoplate structure becomes increasingly porous. Electrochemical results indicate that short-term treatment of CALs in highly concentrated basic solution enhances the capacitive performance.

    6. A Study of the Electrochemical Properties of a New Graphitic Material: GUITAR

      Isaiah O. Gyan, Peter M. Wojcik, Prof. Dr. D. Eric Aston, Prof. David N. McIlroy and Prof. Dr. I. Francis Cheng

      Article first published online: 12 FEB 2015 | DOI: 10.1002/celc.201402433

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      Electric GUITAR: Properties of a new carbon material include 1) fast heterogeneous electron-transfer kinetics across the basal plane of GUITAR, unlike graphite and graphene, and 2) lack of electrolyte intercalation through both edge and basal planes in GUITAR, unlike graphite (see Figure).

  5. Communications

    1. Hybrid Conducting Biofilm with Built-in Bacteria for High-Performance Microbial Fuel Cells

      Dr. Cui-e Zhao, Dr. Jiansheng Wu, Yuanzhao Ding, Victor Bochuan Wang, Yingdan Zhang, Prof. Dr. Staffan Kjelleberg, Prof. Dr. Joachim Say Chye Loo, Prof. Dr. Bin Cao and Prof. Dr. Qichun Zhang

      Article first published online: 12 FEB 2015 | DOI: 10.1002/celc.201402458

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      Modern architecture for biofilms: A new architecture, composed of a graphene–carbon-nanotube network with built-in bacteria, is constructed by a simple and efficient hybrid biofilm method. It shows superior electrochemical properties in terms of excellent current density and remarkable power density compared to a naturally grown biofilm anode.

  6. Articles

    1. Direct Reduction of Alkyl Monohalides at Silver in Dimethylformamide: Effects of Position and Identity of the Halogen

      Lauren M. Strawsine, Arkajyoti Sengupta, Prof. Krishnan Raghavachari and Prof. Dennis G. Peters

      Article first published online: 11 FEB 2015 | DOI: 10.1002/celc.201402410

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      Catalysis with a silver lining: Results from cyclic voltammetry and controlled-potential (bulk) electrolysis of alkyl halides at silver cathodes in dimethylformamide are highly dependent on the identity and position of the halogen atom (see picture).

    2. Combined Secondary Ion Mass Spectrometry Depth Profiling and Focused Ion Beam Analysis of Cu Films Electrodeposited under Oscillatory Conditions

      Dr. Nguyen T. M. Hai, David Lechner, Florian Stricker, Dr. Julien Furrer and Dr. Peter Broekmann

      Article first published online: 11 FEB 2015 | DOI: 10.1002/celc.201402427

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      Twice the bang for your buck! The additive incorporation of a new prototypical leveler additive for copper electroplating was studied. Secondary ion mass spectrometry depth-profile measurements of electrodeposited copper films reveal an interesting additive-specific property that might allow for the resolution of a problem currently encountered in Damascene plating.

    3. Assistance Current Effect for Prevention of Voltage Reversal in Stacked Microbial Fuel Cell Systems

      Bongkyu Kim, Prof. Byung-Geun Lee, Dr. Byung Hong Kim and Prof. In Seop Chang

      Article first published online: 11 FEB 2015 | DOI: 10.1002/celc.201402388

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      Need some assistance? The stacking of microbial fuel cells (MFCs) is an attractive method of increasing voltage to produce practically usable electricity. One of the biggest drawbacks of stacked MFCs, however, is the voltage reversal that commonly occurs. An assistance-current method is proposed to prevent voltage reversal (see figure).

    4. Controllable Electrochemical Synthesis of Silver Nanoparticles on Indium-Tin-Oxide-Coated Glass

      Ziren Yan, Yang Peng, Prof. Ying Wu and Prof. Junwei Di

      Article first published online: 11 FEB 2015 | DOI: 10.1002/celc.201402369

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      Silver plating: An electrochemical method integrating nanoseed nucleation and square-wave cyclic voltammetric growth can controllably deposit Ag nanoparticles and clusters on a transparent indium tin oxide substrate surface.

    5. Ligand Effects and Their Impact on Electrocatalytic Processes Exemplified with the Oxygen Evolution Reaction (OER) on RuO2(110)

      Kai S. Exner, Dr. Josef Anton, Prof. Dr. Timo Jacob and Prof. Dr. Herbert Over

      Article first published online: 11 FEB 2015 | DOI: 10.1002/celc.201402430

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      Pick′n′Mix: Based on homogeneous metal catalysis, in which dedicated modifications of the ligands are able to tune the catalytic performance of the active metal center, DFT calculations are used to demonstrate that the thermodynamic part of the reaction barrier (Gibbs free-energy loss) to the oxygen evolution reaction over RuO2(110) can be significantly reduced by selectively substituting the metal sites in the second coordination shell of the active center.

    6. Visualization of Oxygen Partial Pressure and Numerical Simulation of a Running Polymer Electrolyte Fuel Cell with Straight Flow Channels to Elucidate Reaction Distributions

      Katsuya Nagase, Haruki Motegi, Masakazu Yoneda, Yuzo Nagumo, Takeo Suga, Makoto Uchida, Prof. Junji Inukai, Hiroyuki Nishide and Masahiro Watanabe

      Article first published online: 11 FEB 2015 | DOI: 10.1002/celc.201402385

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      Seeing red: The distribution of oxygen partial pressures in a running polymer electrolyte fuel cell with straight flow channels is obtained through experimental visualization. The oxygen gradient exists along the channel length as well as across the channel width and depth. The simulation results fit well with the visualization data. Current density, water concentration, and temperature are also elucidated by the combination of experiments and simulations.

    7. In Situ Electrochemical Generation of Hydrogen Peroxide in Alkaline Aqueous Solution by using an Unmodified Gas Diffusion Electrode

      Dr. Willyam R. P. Barros, Thaís Ereno, Prof.Dr. Ana C. Tavares and Prof.Dr. Marcos R. V. Lanza

      Article first published online: 6 FEB 2015 | DOI: 10.1002/celc.201402426

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      Volt of confidence: Electrogeneration of H2O2 in alkaline medium, using a gas diffusion electrode with unmodified carbon Printex 6L carbon, exhibits low energy consumption and a high kinetic constant.

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