120 research outputs found
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Batteries and fuel cells working group report
Electrochemical energy systems are dominated by interfacial phenomena. Catalysis, corrosion, electrical and ionic contact, and wetting behavior are critical to the performance of fuel cells and batteries. Accordingly, development of processing techniques to control these surface properties is important to successful commercialization of advanced batteries and fuel cells. Many of the surface processing issues are specific to a particular electrochemical system. Therefore, the working group focused on systems that are of specific interest to DOE/Conservation and Renewable Energy. These systems addressed were: Polymer Electrolyte Membrane (PEM) Fuel Cells, Direct Methanol Oxidation (DMO) Fuel Cells, and Lithium/Polymer Batteries. The approach used by the working group for each of these systems was to follow the current path through the system and to identify the principal interfaces. The function of each interface was specified together with its desired properties. The degree to which surface properties limit performance in present systems was rated. Finally, the surface processing needs associated with the performance limiting interfaces were identified. This report summarizes this information
Association of circulatory Tfh-like cells with neutralizing antibody responses among chronic HIV-1 subtype C infected long-term nonprogressors and progressors
Recovery of platinum from secondary materials: electrochemical reactor for platinum deposition from aqueous iodide solutions
Gold nanoelectrode ensembles for direct trace electroanalysis of iodide
A procedure for the standardization of ensembles of gold nanodisk electrodes (NEE) of 30 nm diameter is presented, which is based on the
analytical comparison between experimental cyclic voltammograms (CV) obtained at the NEEs in diluted solutions of redox probes and CV
patterns obtained by digital simulation. Possible origins of defects sometimes found in NEEs are discussed. Selected NEEs are then employed
for the study of the electrochemical oxidation of iodide in acidic solutions. CV patterns display typical quasi-reversible behavior which involves
associated chemical reactions between adsorbed and solution species. The main CV characteristics at the NEE compare with those observed at
millimeter sized gold disk electrodes (Au-macro), apart a slight shift in E1/2 values and slightly higher peak to peak separation at the NEE. The
detection limit (DL) at NEEs is 0.3 M, which is more than one order of magnitude lower than DL at the Au-macro (4 M). The mechanism
of the electrochemical oxidation of iodide at NEEs is discussed. Finally, NEEs are applied to the direct determination of iodide at micromolar
concentration levels in real samples, namely in some ophthalmic drugs and iodized table salt
Carbon paste electrodes modified by Pt and PtâNi microparticles dispersed in polyindole film for electrocatalytic oxidation of methanol
Nanocatalysts impregnated polythiophene electrodes for the electrooxidation of formic acid
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Track A Basic Science
Peer Reviewedhttps://deepblue.lib.umich.edu/bitstream/2027.42/138319/1/jia218438.pd
ChemInform Abstract: Electrodeposition of Zinc + Nickel Alloy Phases and Electrochemical Stripping Studies of the Anomalous Codeposition of Zinc.
ChemInform Abstract: A High Surface Area Platinum Catalyst Prepared from Uranium Platinum Carbide for the Electrochemical Oxidation of Methanol.
ChemInform Abstract: RING-DISK ELECTRODE STUDIES OF THE OPEN-CIRCUIT DISSOLUTION OF IODINE FILMS FORMED DURING THE ANODIC OXIDATION OF IODIDE ON PLATINUM
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