The porosity of platinum nanoparticle aggregates (PtNPs) is investigated electrochemically via particle-electrode impacts and by XPS. The mean charge per oxidative transient is measured from nanoimpacts; XPS shows the formation of PtO and PtO2 in relative amounts defined by the electrode potential and an average oxidation state is deduced as a function of potential. The number of platinum atoms...

in this paper, multi-wall carbon nanotubes (mwcnts), gold nanoparticles (gnp) and glucose oxidase (god) was developed for the specific detection of glucose. mwcnts were chemically modified with the h2so4–hno3 pretreatment to introduce carboxyl groups which were used to interact with the amino groups of poly(allylamine) (paa) and cysteamine via 1-ethyl-3-(3-dimethylaminopropyl) carbodiimide/n-hy...

Diolefinic antibacterial laser dye namely 1,4-Bis[2-(4-Pyridyl) Vinyl] Benzene (4PVB)have been investigated electrochemically using cyclic voltammetry, chronoamperometry, convolution and deconvolution voltammetry combined with digital simulation techniques at a platinum electrode in 0.1 mol / L Tetra Butyl Ammonium Perchlorate (TBAP) in  solvent 1,2-dichloroethane.  The diolefinic ...

Using first principles simulations we perform a detailed study of the structural, electronic, and transport properties of monatomic platinum chains, sandwiched between platinum electrodes. First, we demonstrate that the most stable atomic configuration corresponds to a zigzag arrangement that gradually straightens as the chains are stretched. Second, we find that the averaged conductance shows ...

We report a novel electrochemical sensing system for single-stranded DNA (ssDNA) with a specific sequence based on the catalytic reduction of protons with platinum deposited by the electrochemical reduction of chloro-2,2':6',2''-terpyridine platinum(II) chloride dihydrate (Pt complex) on a glassy carbon (GC) electrode. There was no catalytic property observed for proton reduction at the GC elec...

Objectives • Elucidate rates and mechanisms of the degradation of polymer electrolyte fuel cell (PEFC) platinum electrode performance – Effect of electrolyte, potential (holding and cycling), time, and temperature • Develop non-platinum cathode electrocatalysts for PEFCs – Transition metal carbides and nitrides – Bi-metallic systems – Metal centers attached to electron-conducting polymer backbones

This paper reports on the development of a novel electrochemical assay for cadmium (II) in natural water, which involves the use of disposable hydroxyapatite modified platinum electrode (HAP/Pt). Cadmium (II) was preconcentrated on the surface of the modified electrode and adsorbed onto HAP and oxidized at E = –680 mV. The HAP-modified platinum electrode exhibited superior performance in compar...

The environmental challenge of synthetic azo dyes is of increasing concern due to the serious health effects on animals and human being. Metanil yellow (monosodium salt of 4-m-sulphophenylazodiphenylamine) was selected as the model compounds for this study because of its wide application in various textile industries either as such or in combinations with some other dyes as color additives. The...

The electrochemistry of nanostructured electrodes is investigated using hydrodynamic modulated voltammetry (HMV). Here a liquid crystal templating process is used to produce a platinum modified electrode with a relatively high surface area (Roughness factor, Rf = 42.4). The electroreduction of molecular oxygen at a nanostructured platinum surface is used to demonstrate the ability of HMV to dis...