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Supporting electrolyte
About: Supporting electrolyte is a research topic. Over the lifetime, 5011 publications have been published within this topic receiving 104172 citations.
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54 citations
TL;DR: In this article, a modified carbon paste electrode with chitosan was used for the determination of Hg(II) ions in water using anodic stripping voltammetry.
Abstract: This paper describes the preparation and electrochemical application of a modified carbon paste electrode with chitosan for the determination of Hg(II) ions in water using anodic stripping voltammetry. Experimental parameters, including the pH of the supporting electrolyte, time and potential of accumulation and scan rate were investigated. The best voltammetric response was observed for a paste composition of 60% (m/m) of graphite powder, 20% (m/m) of chitosan and 20% (m/m) of mineral oil, with 0.1 mol/l NaNO3 solution at pH 6.3 as supporting electrolyte, a preconcentration potential of −0.2 V, preconcentration time of 270 s and a scan rate of 25 mV/s. Under these optimal experimental conditions, the voltammetric signals were linearly dependent on the Hg(II) concentration in the range of 9.99×10−7 to 3.85×10−5 mol/l with a detection limit of 6.28×10−7 mol/l. Three “spiked” samples of water were evaluated using the proposed sensor, and results agreed with those obtained by a reference method at ...
54 citations
TL;DR: The relationship between the surface coverage of spectator (blocking) species and the rate of the hydrogen oxidation reaction (HOR), the oxygen reduction reaction (ORR), and the bulk oxidation of dissolved CO on Pt(100) and Pt(111) single crystals in acidic electrolytes has been probed by cyclic voltammetry, in situ surface X-ray scattering (SXS), and ex situ scanning tunneling microscopy (STM) techniques as discussed by the authors.
Abstract: Relationships between the surface coverage of spectator (blocking) species and the rate of the hydrogen oxidation reaction (HOR), the oxygen reduction reaction (ORR), and the bulk oxidation of dissolved CO on Pt(100) and Pt(111) single crystals in acidic electrolytes has been probed by cyclic voltammetry, in situ surface X-ray scattering (SXS), and ex situ scanning tunneling microscopy (STM) techniques. It is shown that the surface coverage by spectator species during the HOR and the ORR are the same as for the corresponding coverage obtained in the inert (Ar-saturated) environment. This observation is consistent with the proposition that the availability of active sites for H2 and O2 is determined almost entirely by the coverage of adsorbates from the supporting electrolyte and not by the active intermediates. Related electrochemical-SXS studies undertaken for bulk CO oxidation reveal that the maximum rate above the ignition potential is reached on a surface that is covered by ≈90% of an ordered CO adlay...
54 citations
TL;DR: In this article, a non-aqueous all-cobalt redox flow battery, with a cobalt complex 1,10-phenanthroline cobalt(II) hexafluorophosphate ([Co(phen)3](PF6)2) as the active species, acetonitrile as the solvent and tetraethylammonium hexaphosphate (TEAPF6), as the supporting electrolyte, has been investigated.
54 citations
TL;DR: A new method for modifying polypyrrole films is described, which involves complete oxidation of the film, which is electronically non-conductive but ionically conductive, and has ion-selective properties based on the exclusion of anionic species.
54 citations