Matches in SemOpenAlex for { <https://semopenalex.org/work/W2146160583> ?p ?o ?g. }
Showing items 1 to 88 of
88
with 100 items per page.
- W2146160583 endingPage "74" @default.
- W2146160583 startingPage "64" @default.
- W2146160583 abstract "Zirconia-supported Pd16O and bulk Pd16O were used as methane combustion catalysts for a reaction mixture containing 1% methane and 4% 18O2 in helium. The methane oxidation reaction was performed in pulsed experiments and the distribution of oxygen isotopes among the reaction products was monitored. The 18O content of the catalyst following labeled reaction mixture pulses was determined by catalyst reduction with either diluted hydrogen or diluted methane pulses. The first reaction pulse at each temperature resulted in both CO2 and water containing primarily 16O. As the 18O2 uptake from the gas phase increased, however, the 18O distribution in water and carbon dioxide changed differently. The isotopic composition of water molecules reflected the oxygen isotopic distribution in the bulk of the catalyst particles, as determined by reduction titration experiments carried out after the reaction sequences. The larger concentration of 18O in the carbon dioxide is explained by the differences in residence time and mobility of the products water and CO2 on the catalyst. The hydrogen/water samples the bulk, while the CO2 reflects the isotopic composition of the surface. The behavior of the zirconia-supported catalyst was similar to that of the bulk PdO at the lowest temperature; however, as the temperature was increased above 600 K, oxygen exchange with the support became important. The catalyst behavior is explained by the presence of a single oxygen species at the catalyst surface: a bridge-bound oxygen to two palladium atoms. The surface is involved in the methane reaction mechanism by successive reduction/reoxidation cycles. Reoxidation uses both bulk and gas phase oxygen, and also oxygen from the support in the case of the zirconia-supported catalyst. Under these conditions the gas phase oxygen exchange with the catalyst is limited by the methane oxidation surface reaction." @default.
- W2146160583 created "2016-06-24" @default.
- W2146160583 creator A5009774294 @default.
- W2146160583 creator A5015973400 @default.
- W2146160583 creator A5031757814 @default.
- W2146160583 date "2001-10-01" @default.
- W2146160583 modified "2023-10-17" @default.
- W2146160583 title "Contributions of Lattice Oxygen in Methane Combustion over PdO-Based Catalysts" @default.
- W2146160583 cites W2001943285 @default.
- W2146160583 cites W2024196332 @default.
- W2146160583 cites W2027064511 @default.
- W2146160583 cites W2031472184 @default.
- W2146160583 cites W2037989576 @default.
- W2146160583 cites W2042903587 @default.
- W2146160583 cites W2044595242 @default.
- W2146160583 cites W2049037800 @default.
- W2146160583 cites W2062116421 @default.
- W2146160583 cites W2067791864 @default.
- W2146160583 cites W2068503000 @default.
- W2146160583 cites W2074410242 @default.
- W2146160583 cites W2086602255 @default.
- W2146160583 cites W2117242147 @default.
- W2146160583 doi "https://doi.org/10.1006/jcat.2001.3331" @default.
- W2146160583 hasPublicationYear "2001" @default.
- W2146160583 type Work @default.
- W2146160583 sameAs 2146160583 @default.
- W2146160583 citedByCount "91" @default.
- W2146160583 countsByYear W21461605832012 @default.
- W2146160583 countsByYear W21461605832013 @default.
- W2146160583 countsByYear W21461605832014 @default.
- W2146160583 countsByYear W21461605832015 @default.
- W2146160583 countsByYear W21461605832016 @default.
- W2146160583 countsByYear W21461605832017 @default.
- W2146160583 countsByYear W21461605832018 @default.
- W2146160583 countsByYear W21461605832019 @default.
- W2146160583 countsByYear W21461605832020 @default.
- W2146160583 countsByYear W21461605832021 @default.
- W2146160583 countsByYear W21461605832022 @default.
- W2146160583 countsByYear W21461605832023 @default.
- W2146160583 crossrefType "journal-article" @default.
- W2146160583 hasAuthorship W2146160583A5009774294 @default.
- W2146160583 hasAuthorship W2146160583A5015973400 @default.
- W2146160583 hasAuthorship W2146160583A5031757814 @default.
- W2146160583 hasConcept C161790260 @default.
- W2146160583 hasConcept C17112743 @default.
- W2146160583 hasConcept C178790620 @default.
- W2146160583 hasConcept C179104552 @default.
- W2146160583 hasConcept C185592680 @default.
- W2146160583 hasConcept C194439259 @default.
- W2146160583 hasConcept C204242273 @default.
- W2146160583 hasConcept C512968161 @default.
- W2146160583 hasConcept C516920438 @default.
- W2146160583 hasConcept C530467964 @default.
- W2146160583 hasConcept C540031477 @default.
- W2146160583 hasConcept C66114498 @default.
- W2146160583 hasConceptScore W2146160583C161790260 @default.
- W2146160583 hasConceptScore W2146160583C17112743 @default.
- W2146160583 hasConceptScore W2146160583C178790620 @default.
- W2146160583 hasConceptScore W2146160583C179104552 @default.
- W2146160583 hasConceptScore W2146160583C185592680 @default.
- W2146160583 hasConceptScore W2146160583C194439259 @default.
- W2146160583 hasConceptScore W2146160583C204242273 @default.
- W2146160583 hasConceptScore W2146160583C512968161 @default.
- W2146160583 hasConceptScore W2146160583C516920438 @default.
- W2146160583 hasConceptScore W2146160583C530467964 @default.
- W2146160583 hasConceptScore W2146160583C540031477 @default.
- W2146160583 hasConceptScore W2146160583C66114498 @default.
- W2146160583 hasIssue "1" @default.
- W2146160583 hasLocation W21461605831 @default.
- W2146160583 hasOpenAccess W2146160583 @default.
- W2146160583 hasPrimaryLocation W21461605831 @default.
- W2146160583 hasRelatedWork W1226529088 @default.
- W2146160583 hasRelatedWork W1501560638 @default.
- W2146160583 hasRelatedWork W1903893536 @default.
- W2146160583 hasRelatedWork W194200809 @default.
- W2146160583 hasRelatedWork W1966390268 @default.
- W2146160583 hasRelatedWork W1972215728 @default.
- W2146160583 hasRelatedWork W2065197105 @default.
- W2146160583 hasRelatedWork W2072122623 @default.
- W2146160583 hasRelatedWork W2140708538 @default.
- W2146160583 hasRelatedWork W2460728113 @default.
- W2146160583 hasVolume "203" @default.
- W2146160583 isParatext "false" @default.
- W2146160583 isRetracted "false" @default.
- W2146160583 magId "2146160583" @default.
- W2146160583 workType "article" @default.