Matches in SemOpenAlex for { <https://semopenalex.org/work/W2184389812> ?p ?o ?g. }
Showing items 1 to 51 of
51
with 100 items per page.
- W2184389812 abstract "Direct liquid fuel cells have advantages of simpler fuelling infrastructure than hydrogen fuel cells. The Direct Formic Acid Fuel Cell also has the additional advantages that formic acid can be produced from biomass sources, and that the two-electron reaction to CO2 means that catalysis should be simpler than for methanol or ethanol oxidation. Pd is currently the best developed electrocatalyst for this system, but the mechanism for oxidation of formic acid at Pd is still under investigation. In particular, the deactivation of the catalyst over time has been controversial, and there is a significant dependence on the electrolyte anion that needs to be better understood. We have investigated this system on polycrystalline wire electrodes using cyclic voltammetry, potential step, and dynamic electrochemical impedance spectroscopy (dEIS) measurements. The species responsible for deactivation has been investigated by deliberate additions of various organic additives. The classic poison CO(ads) is seen on carbonsupported Pd nanoparticle catalysts after long times, but not by SEIRAS on polycrystalline macroelectrodes. We also found that addition of CO to the solution blocks the HCOOH oxidation and shows a new sharp peak near 1 V, implying that CO is not the deactivating process. Holding the potential for varying times leads to deactivation, but only a small amount of subsequent anodic charge at potentials higher than is characteristic for CO oxidation. Contaminants in the formic acid have been suggested, especially methyl formate, but addition of this increased the current, consistent with its hydrolysis to formic acid and methanol. Methanol itself is unreactive (and non-blocking) on Pd, so the increased current comes from the formic acid hydrolysis product. However, methanol is known to dissociate to CO on nanoparticles, which likely explains the observed poisoning from methyl formate in nanoparticle systems. Formaldehyde is a poison, since its addition passivates the surface and leads to a CO oxidation peak; it is known to oxidize to CO. A reaction model was developed to explain the differences in behavior in sulfuric acid and perchloric acid supporting electrolytes." @default.
- W2184389812 created "2016-06-24" @default.
- W2184389812 creator A5061716639 @default.
- W2184389812 creator A5066964209 @default.
- W2184389812 date "2013-01-01" @default.
- W2184389812 modified "2023-10-16" @default.
- W2184389812 title "Formic Acid Oxidation at Pd Electrodes" @default.
- W2184389812 doi "https://doi.org/10.1149/ma2013-01/39/1363" @default.
- W2184389812 hasPublicationYear "2013" @default.
- W2184389812 type Work @default.
- W2184389812 sameAs 2184389812 @default.
- W2184389812 citedByCount "0" @default.
- W2184389812 crossrefType "journal-article" @default.
- W2184389812 hasAuthorship W2184389812A5061716639 @default.
- W2184389812 hasAuthorship W2184389812A5066964209 @default.
- W2184389812 hasBestOaLocation W21843898121 @default.
- W2184389812 hasConcept C147789679 @default.
- W2184389812 hasConcept C161790260 @default.
- W2184389812 hasConcept C17525397 @default.
- W2184389812 hasConcept C178790620 @default.
- W2184389812 hasConcept C179104552 @default.
- W2184389812 hasConcept C185592680 @default.
- W2184389812 hasConcept C192562407 @default.
- W2184389812 hasConcept C2777379063 @default.
- W2184389812 hasConcept C502130503 @default.
- W2184389812 hasConceptScore W2184389812C147789679 @default.
- W2184389812 hasConceptScore W2184389812C161790260 @default.
- W2184389812 hasConceptScore W2184389812C17525397 @default.
- W2184389812 hasConceptScore W2184389812C178790620 @default.
- W2184389812 hasConceptScore W2184389812C179104552 @default.
- W2184389812 hasConceptScore W2184389812C185592680 @default.
- W2184389812 hasConceptScore W2184389812C192562407 @default.
- W2184389812 hasConceptScore W2184389812C2777379063 @default.
- W2184389812 hasConceptScore W2184389812C502130503 @default.
- W2184389812 hasLocation W21843898121 @default.
- W2184389812 hasOpenAccess W2184389812 @default.
- W2184389812 hasPrimaryLocation W21843898121 @default.
- W2184389812 hasRelatedWork W1989006633 @default.
- W2184389812 hasRelatedWork W2046361778 @default.
- W2184389812 hasRelatedWork W2047193764 @default.
- W2184389812 hasRelatedWork W2053807286 @default.
- W2184389812 hasRelatedWork W2058933753 @default.
- W2184389812 hasRelatedWork W2069596906 @default.
- W2184389812 hasRelatedWork W2078359380 @default.
- W2184389812 hasRelatedWork W2341126297 @default.
- W2184389812 hasRelatedWork W2400115812 @default.
- W2184389812 hasRelatedWork W2899084033 @default.
- W2184389812 isParatext "false" @default.
- W2184389812 isRetracted "false" @default.
- W2184389812 magId "2184389812" @default.
- W2184389812 workType "article" @default.