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Showing 1 to 10 of 10 for “"PtCo"”.
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Low PGM PtCo alloy catalysts for low loading Polymer Electrolyte Membrane Fuel Cells
… Pt catalyst which limits PEMFC cost viability. PtCo alloy catalysts are attractive alternatives to Pt, with similar or higher catalytic activity at a reduced cost. The catalyst is combined with a perfluorosulfonic acid (PFSA) ionomer which serves as the proton conductor and binder to form the …
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A comparative study of PtCo/C Alloys and Pt/C as cathode catalysts for fuel cell applications
… commercial Pt/C catalysts and developmental PtCo/C catalysts, with the aim of increasing understanding of the desirable characteristics of improved activity and stability demonstrated for PtCo catalysts.<br/><br/>To explore the origins of activity and stability enhancement for Pt3Co/C …
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In-vivo-and in-vitro evaluation of the 5 French neonatal gastric tonometer
… unit (PICU) patients, measuring tonometric PCO₂ (PtCO₂) and gastric intramucosal PCO₂ (PiCO₂). (b) In-vivo comparison of PiCO₂ measurements from two 5F tonometers in 10 PICU patients in unfed and fed state. (c) In-vitro comparison of reference PCO₂ to PtCO₂ values obtained using 0.9%saline and …
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Clinical studies of breathing during sleep and sudden infant death syndrome
… on heart rate and transcutaneous oxygen tension, PtcO₂. Secondary aims were to study gross body movements (as an indicator of arousal], and to assess whether infants at 'increased risk' for SIDS were chronicallyhypoxaemic during the early months of life. Polysomniographic studies lasting three to …
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Spectroscopic and Kinetic Characterization of Catalytic Materials for the Conversion of Biomass-Derived Compounds
… the final gas phase hydrogen selectivity, with PtCo catalysts maintaining selectivity >85% at 70% conversion, and PtMo showing 65% H<sub>2</sub> selectivity at similar conversion.</p> <p>Characterization via X-ray spectroscopy and electron microscopy gave structural clues as to the differences …
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The Leaching of Cobalt in Platinum-Cobalt Fuel Cell Catalysts
… leaching process. Three different catalysts – PtCo/C, PtCo2/C and Pt3Co/C were synthesised using an organometallic chemical deposition synthesis method and characterised XRD and SEM-EDS analyses. Different masses of these catalysts were dusted on individual Toray paper gas diffusion electrodes …
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Rapid screening of PEM FC cathode catalysts
… oxygen were studied using a series of Pt/C and PtCo/C catalysts. The catalytic properties of the Pt based carbon-supported catalysts were related to their structure e.g. particle size and lattice parameter, which were obtained mainly using Xray diffraction (XRD). It was found that the results …
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Structure-activity relationships for the water-gas shift reaction over supported metal catalysts
… was leached out. The formation of PtCo alloy was concluded to be inconsequential for promotion of the WGS TOR. The interface sites between CoOx and the PtCo alloy particles are suggested to be the active sites for WGS.</p>
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Waste to fuel: designing a cobalt based catalyst and process for once-through Fischer-Tropsch synthesis operated at high conversion
… equal selectivity towards CO2, CH4 and C5+ as PtCo/Al2O3 and an improved turnover frequency, thus making it a viable replacement support for cobalt under high conversion conditions. A once-through waste-to-fuel process (using biogas from the anaerobic digestion of waste as a raw material) was …
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Kolloidale Nanosysteme aus magnetischen und metallischen Materialien : Synthese und Charakterisierung
Ein Spezialgebiet der modernen Mikroelektronik ist die Miniaturisierung und Entwicklung von neuen nanostrukturierten und Komposit-Materialen aus 3d-Metallen. Durch geeignete Zusammensetzungen können diese sowohl mit einer hohen Sättigungsmagnetisierung und Koerzitivfeldstärke als mit besserer …