Optimized design of a nanostructured SPCE-based multipurpose biosensing platform formed by ferrocene-tethered electrochemically-deposited cauliflower-shaped gold nanoparticles

• Wicem Argoubi,
• Maroua Saadaoui,
• Sami Ben Aoun and
• Noureddine Raouafi

Beilstein J. Nanotechnol. 2015, 6, 1840–1852, doi:10.3762/bjnano.6.187

• nanoparticles to either transduce the recognition event or to catalyze the hydrogen peroxide reduction. The biosensors are endowed with good dynamic ranges, high sensitivities and were found to be selective and specific to the examined analytes. The biosensors were assessed for accurate determination of the

• peroxide reduction. Real sample analysis The two devices have been successfully applied to the detection of hIgG and hydrogen peroxide in human blood serum and local honey [52] chosen as real complex samples, respectively. Before the analysis, the two samples of honey and serum were diluted to 10× and to

• . The higher sensitivity can be probably ascribed to ferrocene directly attached to the electrode surface. The relatively limited dynamic range is probably due the low number of ferrocene molecules self-assembled to gold nanoparticles (about 0.4 nmole) limiting the turnover frequency during the hydrogen

Liquid fuel cells

• Grigorii L. Soloveichik

Beilstein J. Nanotechnol. 2014, 5, 1399–1418, doi:10.3762/bjnano.5.153

• oxidation and hydrogen peroxide reduction that were about 22 times higher than a commercial Pt/C electrocatalyst at the same loading [162]. In an attempt to increase the conductivity and stability of the AEM, a composite membrane of a hydroxyl conducting quaternary ammonium polymer confined in a pre-treated

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

• structure sensitivity and the lack of a reduction current at high potentials are discussed in the light of the surface oxidation and disordering processes and the possible relevance of the hydrogen peroxide reduction and oxidation reactions in the ORR mechanism. The necessity to build precise and realistic

• electrocatalysts for fuel-cell cathodes is only possible through a cooperative approach between theory and experiments. Keywords: hydrogen peroxide oxidation; hydrogen peroxide reduction; oxygen reduction; Pt(111); stepped surfaces; Introduction Nowadays, the oxygen reduction reaction (ORR) is arguably one of

• region for the ORR on a HMRD Pt(111) electrode in oxygen saturated 0.1 M HClO4, at different upper potentials and 50 rpm. Inset: Detailed view of the Pt(111) oxide formation region. Hydrogen peroxide reduction and oxidation reactions on Pt(111) in 0.1 M HClO4 + 1 mM H2O2. (A) Cyclic voltammetric profile

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

• interfering compounds may be co-oxidized. Prussian Blue (PB) is the most advantageous hydrogen peroxide transducer [14][15][16] due to its higher activity in H2O2 reduction and oxidation reactions, higher selectivity for hydrogen peroxide reduction in the presence of oxygen, and insensitivity to the presence