نتایج جستجو برای: chronopotentiometry
تعداد نتایج: 152 فیلتر نتایج به سال:
Nitrite contamination of groundwater is a concerning consequence anthropic activity. The electrochemical detection nitrite in water based on direct electrocatalytic oxidation over modified electrodes. However, drawbacks associated to the high potential required, oxide layer formation, and O2 interference are present. Considering recent availability low cost platinum-group-metal-free (PGM-free) ...
[1] To analyze and interpret the chemical record, the 2007 Phoenix Mars Lander includes four wet chemistry cells. These Wet Chemistry Laboratories (WCLs), part of the Microscopy, Electrochemistry, and Conductivity Analyzer (MECA) package, each consist of a lower ‘‘beaker’’ containing sensors designed to analyze the chemical properties of the regolith and an upper ‘‘actuator assembly’’ for addin...
Conventional ion-selective electrodes with a liquid junction have the disadvantage of potential drift. All-solid-state ion-selective electrodes with solid contact in between the metal electrode and the ion-selective membrane offer high capacitance or conductance to enhance potential stability. Solution-casted chitosan/Prussian blue nanocomposite (ChPBN) was employed as the solid contact layer f...
The electrochemical measurement of concentration in molten chloride salts is a valuable tool for the control existing and potential industrial processes, recycling precious materials energy production. techniques commonly used to measure each techniques’ associated theory are discussed. Practices which improve accuracy precision set forth. Exceptionally accurate precise measurements published l...
Anodic TiO2 nanotube (TNT) arrays have been intensively investigated as anodes in water splitting (WS) cells because of their excellent chemical stability. However, anodic TNT is seldom considered a cathode for the hydrogen evolution reaction (HER) an electrochemical WS cell. This study shows that reduced (R-TNT) sample prepared with cathodic reduction technique without loading any co-catalyst ...
A modern cybernetic potentiostat plays a significant role in realizing various electrochemical measurements. This technology report describes general-purpose, scalable, handheld (10 cm2), yet affordable hardware–software framework for potentiostat, galvanostat, and impedance spectrometer with high capabilities: (1) cyclic voltammetry, square-wave (potential-step) chronoamperometry as potentiost...
The high cost of catalyst materials suitable for the oxygen evolution reaction (OER) in polymer electrolyte membrane water electrolyzers (PEMWE) is still a major hurdle that needs overcoming before commercial PEMWE can have meaningful impact as technology hydrogen economy. Metal oxides based on precious metals are currently most reliable and used catalysts PEMWE; however, alternative or modifie...
Superconcentrated electrolytes, being highly thermodynamically nonideal, provide a stringent proving ground for continuum transport theories. Herein, we test an ostensibly complete model of LiPF6 in ethyl-methyl carbonate (EMC) based on the Onsager–Stefan–Maxwell theory from irreversible thermodynamics. We perform synchronous magnetic resonance imaging (MRI) and chronopotentiometry to examine h...
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