[PDF] Top 20 J. Braz. Chem. Soc. vol.13 número4
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J. Braz. Chem. Soc. vol.13 número4
... Com todos esses limitantes, cremos que os trabalhos que aqui figuram são um bom exemplo do que de melhor se apresentou no XII SIBEE dentro das varias áreas abordadas: Eletroquímica Funda[r] ... See full document
2
J. Braz. Chem. Soc. vol.13 número4
... the cell, b is the Tafel slope and j o is the exchange current density for the oxygen reduction reaction (ORR) in the Pt/C catalyst. R represents the total contribution for the linear polarization components, ... See full document
7
J. Braz. Chem. Soc. vol.13 número4
... be performed. As an example, we show in Figure 13 thermal desorption spectra (TDS) of carbon monoxide adsorbed on different PtRu catalysts. Two adsorption states are observed at Pure polycrystalline Pt, which are ... See full document
9
J. Braz. Chem. Soc. vol.13 número4
... results in a voltage drop across the membrane-solution interfaces inside the stack, which can reach extremely high values producing the water split. As a consequence, the local pH can be[r] ... See full document
8
J. Braz. Chem. Soc. vol.13 número4
... Differential equations describing the evolution of defect concentrations inside ultra-thin films are developed and numerically resolved for the growth of passivating films under transien[r] ... See full document
5
J. Braz. Chem. Soc. vol.13 número4
... The highest cathode current efficiency for deposition of the alloy was about 69% for cylindrical and 64% for rectangular platinum anode while working at bath temperature 80 o C, cathode [r] ... See full document
7
J. Braz. Chem. Soc. vol.13 número4
... 9 showed that PtRuNi electrocatalyst prepared by the Bönnemann method and thermally treated presents higher electroactivity than the same catalysts without thermal treatment.. Results ob[r] ... See full document
6
J. Braz. Chem. Soc. vol.13 número4
... Rhenium-containing films were grown on gold and platinum after different potentiostatic and potentiodynamic polarizations in the - 0.20 V to 0.70 V range (vs rhe) in aqueous acid perrhen[r] ... See full document
6
J. Braz. Chem. Soc. vol.13 número4
... In Figure 4 can be observed that theoretical curve described adequately almost the whole current transients, therefore is possible to classify, the systems studied in this paper, as 3D m[r] ... See full document
8
J. Braz. Chem. Soc. vol.13 número4
... In case of inverse titrations (Figure 3, curve 3), when thallium nitrate solution was used as titrate, a gradual decrease in pH was observed till at the stoichiometric point a downward j[r] ... See full document
5
J. Braz. Chem. Soc. vol.13 número4
... Meanwhile, the dissolution responses are clearly affected by the anions of the electrolyte as their shape and peak potentials are quite different in the three cases. Thus, for sulfuric acid solutions (Figure 1A) a ... See full document
6
J. Braz. Chem. Soc. vol.13 número4
... The profiles are slightly better defined when Ru was anchored first but the response is different from that of Pt/C E-TEK catalyst (Figure 5B). After the thermal treatment there are cle[r] ... See full document
9
J. Braz. Chem. Soc. vol.13 número4
... Studies on the stability of anodic oxides grown on zirconium and its biocompatible alloys Ti- 50Zr at.% and Zr-2.5Nb wt.%, in aerated Ringer physiological solution, at 25 and 37 °C, we[r] ... See full document
6
J. Braz. Chem. Soc. vol.13 número4
... a highly sensitive sensing surface, a substrate molecule needs to be able to interact without steric restrictions. One approach to this is the covalent protein immobilization, ideally at a site that does not affect the ... See full document
7
J. Braz. Chem. Soc. vol.13 número4
... problem, reflectance experiments were conducted using a specularly reflective Au electrode in a cell with a quartz window. For comparative purposes, these experiments were done with both[r] ... See full document
7
J. Braz. Chem. Soc. vol.13 número4
... The process, aiming at the electrochemical determination of traces of heavy metals in water samples, was followed through the recovery of the voltammetric wave of Cd(II) in the presence [r] ... See full document
8
J. Braz. Chem. Soc. vol.13 número4
... Another feature of the spectra presented in Figure 6 is that the photoresponse evolution near the absorption edge is not a sharp one, and shows subgap absorption. This phenomenon is the well-known band tail, ... See full document
8
J. Braz. Chem. Soc. vol.13 número4
... The precon- centration time employed was as long as to make the first term in equation (3) negligible (that is, to achieve steady- state conditions). The charge Q c of the stripping pea[r] ... See full document
8
J. Braz. Chem. Soc. vol.13 número4
... of the electrode, shows a straight line that intersects the origin (see insert in Figure 1). This behavior evidences that the cadmium electroreduction is a mass transport controlled reaction in the potential range ... See full document
5
J. Braz. Chem. Soc. vol.13 número4
... The use of polymer in electrolytes can be divided in three categories, as follow: (a) a polymer swollen with a liquid electrolyte, which provides high values of conductivity, but does no[r] ... See full document
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