Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 7 of 7 for “"CO stripping"”.
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Oxygen reduction reaction on carbon supported dispersed platinum nanoparticles and extended platinum surfaces
To date, the cost of high platinum loadings in polymer electrolyte fuel cells (PEFCs) remains one of the main deterrents preventing their broad commercialisation. The reaction of interest in this work is the oxygen reduction reaction (ORR) occurring at the cathode side of the PEFC. The ORR has been …
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Evaluation of process parameters and membranes for SO2 electrolysis
The environmentally unsafe by-products (CO2, H2S, NOx and SO2 for example) of using carbon-based fuels for energy generation have paved the way for research on cleaner, renewable and possibly cheaper alternative energy production methods. Hydrogen gas, which is considered as an energy carrier, can …
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Synthesis and Characterization of Platinum-Based Fuel Cell Catalysts
… 0.4--0.5, displaying twice the activity of the commercial Pt-Ru alloy catalyst. COs adsorbed on these Pt/Ru nanoparticle consisted of two domains: CO on Pt domains behaved like CO on pure Pt while CO near Ru islands had highly shifted 13C NMR resonances, weaker Korringa relaxation, and thermal …
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Synthesis, characterization and catalytic investigations of Pt-based binary (bimetallic) and ternary (trimetallic) nanoparticles
… that nanoparticles of 75 at.% platinum (Pt) composition and anisotropic morphology, will outperform standard catalysts in (PEMFC) hydrogen fuel cells. A survey of the scientific literature on this topic is first presented. The synthetic strategies which were developed for the preparation of …
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Influence of particle size and morphology of Pt₃Co/C on the oxygen reduction reaction
… been one of the major drawbacks in wide scale commercialisation of fuel cells. In an effort to improve the activity of the catalyst and therefore reduce Pt loadings on the catalyst, Pt can be alloyed with transition metal elements (e.g. Ni, Co and Fe) to form bimetallic catalysts. Alloying has …
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The Effects of Manure Handling and Dietary Protein on Ammonia Fluxes from a Flush Dairy
… ammonia (NH₃(g)) poses an environmental concern mainly due its ability to form fine particulate matter (PM2.5 with a diameter smaller than 2.5 micrometers) in the form of ammonium nitrate (NH₄NO₃) and ammonium sulfate ([NH₄]₂SO₄). These forms of PM2.5 may reduce visibility, contribute to …
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Σύνθεση, φυσικοχημικός και ηλεκτροχημικός χαρακτηρισμός ηλεκτροκαταλυτών για κυψελίδες καυσίμου υψηλής θερμοκρασίας pem
… σε διάλυμα αιθυλενογλυκόλης (Ethylene Glycol, EG). Τα υλικά συντέθηκαν κάτω από διάφορες συνθήκες (χρόνος και θερμοκρασία αντίδρασης) και περιβάλλοντα αντίδρασης (pH) στοχεύοντας σε διάφορες φορτίσεις σε Pt. Η εισαγωγή ομάδων πυριδίνης στα τοιχία νανοσωλήνων άνθρακα οδήγησε σε …