FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W2074014747> ?p ?o ?g. }

• W2074014747 endingPage "450" @default.
• W2074014747 startingPage "441" @default.
• W2074014747 abstract "Two series of molybdena–alumina catalysts were prepared. The first series was prepared by the incipient wetness procedure (1.7–8.8 wt.% Mo) (series IW). A second series was obtained using the equilibrium adsorption (1.3–8.2 wt.% Mo) (series EA) method. X-ray photoelectron spectroscopy (XPS) was used to study the distribution of Mo oxidation states. The average Mo oxidation state estimated from XPS agreed with that obtained by measuring the O2 consumption on reoxidation, for a given catalyst. The chemisorption of oxygen at −78°C and the isomerization of 1-butene were performed as probes for assaying the number of coordinatively unsaturated sites created by the reduction process. These studies were conducted in order to study possible changes in Mo speciation or distribution, relevant to catalytic reactions, which may occur as a result of the specific features of the preparation method (EA vs. IW). The results showed that for both series of solids, the reducibility of the molybdenum species increases as the metal loading increases, in agreement with the literature. For catalysts with similar loading, the IW series showed a higher degree of reduction with a concomitant increase in the relative abundance of Mo(IV) species attributed to paired double-bonded Mo(IV) entities (as in MoO2). The reducibility data were consistent with the catalytic results and the oxygen chemisorption results. IW preparations (with similar Mo loading) were more active towards the isomerization of 1-butene and chemisorbed larger amounts of oxygen than their EA counterparts. The differences in reducibility can be ascribed to a nonuniform repartition of the molybdenum species between the external and internal surfaces of the alumina, for the IW preparations. Another possible explanation may stem from a decoration effect of the molybdenum species by Al(III) ions. The latter may arise from dissolution of the alumina, which is favored on the EA series due to the long contact time between the solution of the Mo promoter and the support." @default.
• W2074014747 created "2016-06-24" @default.
• W2074014747 creator A5009253992 @default.
• W2074014747 creator A5022059140 @default.
• W2074014747 creator A5035046906 @default.
• W2074014747 creator A5036304545 @default.
• W2074014747 creator A5047411066 @default.
• W2074014747 creator A5054496330 @default.
• W2074014747 creator A5056848046 @default.
• W2074014747 creator A5091156507 @default.
• W2074014747 date "1999-08-01" @default.
• W2074014747 modified "2023-09-27" @default.
• W2074014747 title "Effect of the preparation method on the reducibility of molybdena–alumina catalysts" @default.
• W2074014747 cites W119608931 @default.
• W2074014747 cites W139460085 @default.
• W2074014747 cites W145411475 @default.
• W2074014747 cites W1527274151 @default.
• W2074014747 cites W1528084338 @default.
• W2074014747 cites W1572113774 @default.
• W2074014747 cites W1597446142 @default.
• W2074014747 cites W1972616434 @default.
• W2074014747 cites W1973961218 @default.
• W2074014747 cites W1976764093 @default.
• W2074014747 cites W1978395518 @default.
• W2074014747 cites W1985917435 @default.
• W2074014747 cites W1988091595 @default.
• W2074014747 cites W1991761197 @default.
• W2074014747 cites W1993032327 @default.
• W2074014747 cites W1993091406 @default.
• W2074014747 cites W1993200284 @default.
• W2074014747 cites W1994504478 @default.
• W2074014747 cites W2003733698 @default.
• W2074014747 cites W2004428930 @default.
• W2074014747 cites W2007526456 @default.
• W2074014747 cites W2013815393 @default.
• W2074014747 cites W2014989116 @default.
• W2074014747 cites W2018183637 @default.
• W2074014747 cites W2031736283 @default.
• W2074014747 cites W2034906076 @default.
• W2074014747 cites W2036805943 @default.
• W2074014747 cites W2041838740 @default.
• W2074014747 cites W2043307379 @default.
• W2074014747 cites W2048253173 @default.
• W2074014747 cites W2048993711 @default.
• W2074014747 cites W2050277283 @default.
• W2074014747 cites W2055382644 @default.
• W2074014747 cites W2056454377 @default.
• W2074014747 cites W2062507502 @default.
• W2074014747 cites W2063409609 @default.
• W2074014747 cites W2065215632 @default.
• W2074014747 cites W2068043331 @default.
• W2074014747 cites W2068383030 @default.
• W2074014747 cites W2070455505 @default.
• W2074014747 cites W2078129579 @default.
• W2074014747 cites W2083135905 @default.
• W2074014747 cites W2088499318 @default.
• W2074014747 cites W2089619041 @default.
• W2074014747 cites W2094620843 @default.
• W2074014747 cites W2099571024 @default.
• W2074014747 cites W2101236269 @default.
• W2074014747 cites W2102067522 @default.
• W2074014747 cites W2116217144 @default.
• W2074014747 cites W2128926455 @default.
• W2074014747 cites W2148748101 @default.
• W2074014747 cites W2949801026 @default.
• W2074014747 cites W4211133984 @default.
• W2074014747 cites W4244615159 @default.
• W2074014747 cites W4248893981 @default.
• W2074014747 cites W86775797 @default.
• W2074014747 cites W89603428 @default.
• W2074014747 doi "https://doi.org/10.1016/s1381-1169(99)00045-x" @default.
• W2074014747 hasPublicationYear "1999" @default.
• W2074014747 type Work @default.
• W2074014747 sameAs 2074014747 @default.
• W2074014747 citedByCount "13" @default.
• W2074014747 countsByYear W20740147472021 @default.
• W2074014747 crossrefType "journal-article" @default.
• W2074014747 hasAuthorship W2074014747A5009253992 @default.
• W2074014747 hasAuthorship W2074014747A5022059140 @default.
• W2074014747 hasAuthorship W2074014747A5035046906 @default.
• W2074014747 hasAuthorship W2074014747A5036304545 @default.
• W2074014747 hasAuthorship W2074014747A5047411066 @default.
• W2074014747 hasAuthorship W2074014747A5054496330 @default.
• W2074014747 hasAuthorship W2074014747A5056848046 @default.
• W2074014747 hasAuthorship W2074014747A5091156507 @default.
• W2074014747 hasConcept C118792377 @default.
• W2074014747 hasConcept C126661725 @default.
• W2074014747 hasConcept C127413603 @default.
• W2074014747 hasConcept C147789679 @default.
• W2074014747 hasConcept C150394285 @default.
• W2074014747 hasConcept C161790260 @default.
• W2074014747 hasConcept C175708663 @default.
• W2074014747 hasConcept C178790620 @default.
• W2074014747 hasConcept C179104552 @default.
• W2074014747 hasConcept C185592680 @default.
• W2074014747 hasConcept C2778591166 @default.
• W2074014747 hasConcept C2780026712 @default.
• W2074014747 hasConcept C2780091686 @default.

• next