Some reflections on the understanding of the oxygen reduction reaction at Pt(111)

• Ana M. Gómez-Marín,
• Ruben Rizo and
• Juan M. Feliu

Beilstein J. Nanotechnol. 2013, 4, 956–967, doi:10.3762/bjnano.4.108

• alkaline and acidic solutions that are free from dissolved species that strongly adsorb on the electrode surface and could interfere with species coming from water adsorption in the whole potential range. A cyclic voltammogram of Pt(111) in 0.1 M NaOH is depicted in Figure 1B. However, a serious drawback

A facile synthesis of a carbon-encapsulated Fe₃O₄ nanocomposite and its performance as anode in lithium-ion batteries

• Raju Prakash,
• Katharina Fanselau,
• Shuhua Ren,
• Tapan Kumar Mandal,
• Christian Kübel,
• Horst Hahn and
• Maximilian Fichtner

Beilstein J. Nanotechnol. 2013, 4, 699–704, doi:10.3762/bjnano.4.79

• the first cycle remained at nearly 100%. The cyclic voltammogram of [Fe3O4–C] is comparable to that of other Fe3O4 electrodes [9][10][11], and shows a cathodic wave at 0.56 V and an anodic wave at 1.78 V, which correspond to the Fe3+/Fe2+-to-Fe0 redox couple. The irreversible wave at 0.4 V can be

Optimization of solution-processed oligothiophene:fullerene based organic solar cells by using solvent additives

• Gisela L. Schulz,
• Marta Urdanpilleta,
• Roland Fitzner,
• Eduard Brier,
• Elena Mena-Osteritz,
• Egon Reinold and
• Peter Bäuerle

Beilstein J. Nanotechnol. 2013, 4, 680–689, doi:10.3762/bjnano.4.77

• chloroform and as thin film, spin-coated from chlorobenzene at 80˚C. (b) Cyclic voltammogram of DCV5T-Bu4 in dichloromethane, TBAPF6 (0.1 M) measured versus the ferrocene/ferrocenyl (Fc/Fc+) redox couple. Diagram showing the HOMO and LUMO energy levels of DCV5T-Bu4, PCBM derivatives [34][35], and C60. J–V

Ultramicrosensors based on transition metal hexacyanoferrates for scanning electrochemical microscopy

• Maria A. Komkova,
• Angelika Holzinger,
• Andreas Hartmann,
• Alexei R. Khokhlov,
• Christine Kranz,
• Arkady A. Karyakin and
• Oleg G. Voronin

Beilstein J. Nanotechnol. 2013, 4, 649–654, doi:10.3762/bjnano.4.72

• ) deposited on top (contact mode images were recorded in air with 0.3 lines/s at a resolution of 512 × 512 lines/image). Cyclic voltammogram of three PB-Ni-HCF bilayers deposited on a platinum ultramictroelectrode (0.1 M KCl and 0.1 M HCl, sweep rate 20 mV·s−1). Standard addition curve for hydrogen peroxide

• bilayers from one to three resulted in a higher sensitivity of the modified electrodes. A continued increase of the number of PB–Ni–HCF bilayers resulted in a loss of mechanical stability. Therefore, all further experiments were carried out with electrodes modified with three bilayers. A typical cyclic

• voltammogram of a 3-layer-modified microelectrode in supporting electrolyte solution is shown in Figure 2. Table 1 summarizes the comparison of sensitivity and stability of PB–Ni–HCF-sensors using different electrode materials with data for UMEs only modified with PB. The measurements were carried out in a

In situ monitoring magnetism and resistance of nanophase platinum upon electrochemical oxidation

• Eva-Maria Steyskal,
• Stefan Topolovec,
• Stephan Landgraf,
• Heinz Krenn and
• Roland Würschum

Beilstein J. Nanotechnol. 2013, 4, 394–399, doi:10.3762/bjnano.4.46

• ). Prior to the measurements the electrode was activated by repeatedly cycling between the oxygen- and hydrogen-evolution regimes. A typical cyclic voltammogram (CV) taken for sample PtER is shown by the gray curve in Figure 1. As the potential is varied with triangular characteristics, the CV curve is run

Revealing thermal effects in the electronic transport through irradiated atomic metal point contacts

• Bastian Kopp,
• Zhiwei Yi,
• Daniel Benner,
• Fang-Qing Xie,
• Christian Obermair,
• Thomas Schimmel,
• Johannes Boneberg,
• Paul Leiderer and
• Elke Scheer

Beilstein J. Nanotechnol. 2012, 3, 703–711, doi:10.3762/bjnano.3.80

• layer are the most prominent effects. Keywords: atom transistor; atomic contacts; cyclic voltammogram; electrochemically closed break junction; electronic transport; (Helmholtz) double layer; light-induced signals; temperature-induced changes; thermovoltage; Introduction Electronic transport on the

• about the temperature-induced changes of the Helmholtz layer. We therefore carried out voltammetric studies in order to determine the regions of the voltammogram in which the laser-induced signals are most prominent. Light-induced signals in the cyclic voltammogram of AgNO3 were observed as shown in

• working electrodes. The probed area (90 × 60 µm2) is split by the gap between the electrodes as the red line indicates. Cyclic voltammogram of AgNO3 under illumination. Twelve insets of zoomed areas at different potentials are presented here (scan rate is 20 mV/s). Cyclic voltammogram (CV) of AgNO3 at 35

Schottky junction/ohmic contact behavior of a nanoporous TiO₂ thin film photoanode in contact with redox electrolyte solutions

• Masao Kaneko,
• Hirohito Ueno and
• Junichi Nemoto

Beilstein J. Nanotechnol. 2011, 2, 127–134, doi:10.3762/bjnano.2.15

• shown from distinct photocurrents in the cyclic voltammogram (CV) that the nanosurface of the mesoporous n-TiO2 film forms a Schottky junction with water containing a strong electron donor such as methanol. Formation of a Schottky junction (liquid junction) was also proved by Mott–Schottky plots at the

• [Fe(CN)6]4− around the redox potential of the iron complex. It was suggested that the iron complex forms a second Schottky junction for which the flat band potential (Efb) lies near the redox potential of the iron complex. Keywords: cyclic voltammogram of titanium dioxide photoanode; flat band

• subsequent research we found that a mesoporous TiO2 semiconductor film forms both a Schottky junction as well as exhibiting partial ohmic contact behavior in a redox electrolyte solution and this multi-nature behavior is reported in this publication. Results and Discussion The cyclic voltammogram (CV) at a