1,721,097 research outputs found
Silver Electrodeposition from water-acetonitrile mixed solvents in the presence of tetrabutylammonium perchlorate. Part II - A SERS study of acetonitrile reactivity and tetrabutylammonium adsorption
No full textCorrosion performance of austenitic stainless steel bipolar plates for Nafion- and room-temperature ionic-liquid-based PEMFCs
Full text linkIn this paper we study the corrosion of AISI 304 austenitic stainless steel PEMFC bipolar plates in aqueous and room-temperature ionic-liquid electrolytes. The anodic potential thresholds and dynamics have been investigated by electrochemical (potentiodynamic and potentiostatic) and in situ spectroelectrochemical methods (visible electroreflectance and VIS-UV spectroellipsometry). We measured the values of damage potentials and we followed the time evolution of corrosion current and reflectivity above and below the pitting potential, obtaining an accurate characterisation of the surface conditions under oxidative attack. The ability of AISI 304 to repassivate in Cl --containing aqueous solution as well as the amount of residual surface damage have been assessed quantitatively by following electrode reflectivity under applied potential. Outstanding inertness of AISI 304 in [BMP][TFSA] was proved. The results of this work show that low-cost AISI 304 is a promising interconnect material for both Nafion- and RTIL-based PEMFCs
Electrochemical adsorption of cyanide on Ag(111) in the presence of cetylpyridinium chloride
No full textSilver electrodeposition from water-acetonitrile mixed solvents. Part III – An in situ investigation by optical second harmonic generation spectroscopy
No full textAn in situ FT-IR evaluation of candidate organic corrosion inhibitors for carbon steel in contact with alkaline aqueous solutions.
No full textA SERS investigation of Cu electrodeposition in the presence of the model leveller 4-{2-[1-(2-cyanoethyl)-1,2,3,4-tetrahydroquinolin-6-yl]diazenyl} benzonitrile
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An Electrochemical and Spectroelectrochemical Study of the Electrodeposition of Au from KAu(CN)2 Solutions containing 4-Cyanopyridine and Cetylpyridinium Chloride
No full textMutual estimates of time-frequency representations and uncertainty principles
Full text linkIn this paper we give different estimates between Lebesgue norms of quadratic time-frequency representations. We show that, in some cases, it is not possible to have such bounds in classical Lp spaces, but the Lebesgue norm needs to be suitably weighted. This leads to consider weights of polynomial type, and, more generally, of ultradifferentiable type, and this, in turn, gives rise to use as functional setting the ultradifferentiable classes. As applications of such estimates we deduce uncertainty principles both of Donoho-Stark type and of local type for representations
An electrochemical and in-situ SERS Study of Au Electrodeposition from a Thiourea Solution
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