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Sep 30, 2018Open AccessArticle
Ba5NdTi3V7O30 is a tungsten
bronze structured ceramic sample, prepared by Solid State reaction route
at high temperature (950℃). The room temperature XRD analysis confi ...
Mar 28, 2018Open AccessArticle
Conventional electrolytic
cells are usually cumbersome and simulated with fragile open ended glass wares
such as beakers, tubes, troughs or tanks which are prone to interference and
contamination. Electrolytic cell was designed by allotting dimensions for its length:
12.0 cm, breadth: 6.0 cm and height: 8.0 cm to the cell; its casing for 9.0 V
power source was allotted 2.5 cm length, 2.5 cm breadth and 2 ...
Jul 26, 2016Open AccessArticle
Disposal of lead laden cupels is proving problematic to mining and
metallurgical companies due to environmental and health issues. In this study
the optimization of operation parameters for the electrode position of lead
metal from acetic acid leachant was carried out. The effects of voltage,
temperature, concentration, size of electrode and the effect of the space between
the electrodes were investigated. Acetic acid (10%) was us ...
Jan 27, 2016Open AccessArticle
The present study describes the catalytic activity of the platinum coated
Nafion membranes towards oxygen reduction reaction in proton exchange membrane
fuel cells. In contrast to the conventional three layered structures of the gas
diffusion electrode, as-made gas diffusion electrodes are two layered in which
the platinum electrocatalyst are deposited directly onto the Nafion membrane. Spin-coating
method and impregnation-reduction approaches were used to synthesize Pt-coated
Nafion membranes. ...
Dec 10, 2015Open AccessArticle
We have verified through an electrochemical technique (capacity, impedance
and photo-electro- chemical measurement) and also through an analytic technique
of auger spectrometry that passive films formed on inconels 600 and 690 are comprised of two
layers. This has led us to establish precise links between the chemical composition
of passive films formed on inconels and their electrochemical properties. The results
obtained at different frequencies show the existence of two areas. The passive oxi...
Jun 19, 2014Open AccessArticle
Titania nanopores were fabricated on silicon substrate. Ti thin films (600 nm) were first deposited by radio-frequency (RF) magnetron sputtering at two substrate temperatures and then anodized in glycerol electrolytes containing NH4F. The morphology and structure were identified by means of scanning electron microscopy (SEM), X-ray diffractometry (XRD). The effect of the temperature on the Ti thin films deposited by RF magnetron sputtering and the applied voltage on nanopore morphology were inve...
Jun 18, 2014Open AccessArticle
Selective methods of thermocatalytic determination of carbon oxide and hydrocarbons in exhaust gases of vehicles are based on measurement of different thermo effects of oxidation of a combustible mixture, obtained from two identical thermosensible elements working at different temperatures are developed. At one temperature there is an oxidation of all analyzed gas mixture, and on another—the mixture without a selectively determined component and by the difference of thermo effects an exact conce...
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