Matches in SemOpenAlex for { <https://semopenalex.org/work/W1969001118> ?p ?o ?g. }
Showing items 1 to 93 of
93
with 100 items per page.
- W1969001118 endingPage "302" @default.
- W1969001118 startingPage "293" @default.
- W1969001118 abstract "Three different amorphous aluminum phosphates have been characterized by their specific surface area and pore volume and by XPS and FTIR studies. Three types of A1 surface hydroxyl groups at 3793.8, 3768.5, and 3743.2 cm−1 and only one type of P surface hydroxyl groups at 3677.5 cm−1 are found in FTIR spectra after evacuation at 800°C. The ratio of the integrated absorbance of the IR bands from AIOH and POH surface groups is a sensitive tool to study the surface of AlPO4 directly. A linear relation between the electronegativity of the metal ion and the stretching vibration of surface hydroxyl groups is proposed for Al, Si, P, and B tetrahedral surface ions. The three Al surface hydroxyl groups are assigned to four-coordinated (tetrahedral), five-coordinated, and six-coordinated surface Al ions. Amorphous AlPO4 contains four- and five-coordinated Al ions and AlPO4 with high specific surface area also has six-coordinated Al ions at the surface. CO is adsorbed on the phosphorus surface hydroxyl groups at low temperature, giving an IR band at 2170 cm−1 while the IR band from the POH group is shifted to 3495 cm−1. On AlPO4 of high surface area, CO is also adsorbed on coordinatively unsaturated, five-coordinated Al surface ions. Four-coordinated Al ions are also found, but none with the coordination number three. Impregnation with chromium compounds in ethanol does not change the specific surface area, whereas impregnation in water resulted in a decreased specific surface area, to less than half of its previous value." @default.
- W1969001118 created "2016-06-24" @default.
- W1969001118 creator A5047613419 @default.
- W1969001118 date "1991-04-01" @default.
- W1969001118 modified "2023-10-12" @default.
- W1969001118 title "Amorphous AIPO4 as catalyst support 2. Characterization of amorphous aluminum phosphates*1" @default.
- W1969001118 cites W1969706686 @default.
- W1969001118 cites W1972527376 @default.
- W1969001118 cites W1987816989 @default.
- W1969001118 cites W1989512228 @default.
- W1969001118 cites W1996172208 @default.
- W1969001118 cites W2006102943 @default.
- W1969001118 cites W2021809601 @default.
- W1969001118 cites W2023462400 @default.
- W1969001118 cites W2026590482 @default.
- W1969001118 cites W2031359079 @default.
- W1969001118 cites W2035988387 @default.
- W1969001118 cites W2041989401 @default.
- W1969001118 cites W2044064087 @default.
- W1969001118 cites W2071818371 @default.
- W1969001118 cites W2072404029 @default.
- W1969001118 cites W2074246278 @default.
- W1969001118 cites W2076360103 @default.
- W1969001118 cites W2081059782 @default.
- W1969001118 cites W2082419639 @default.
- W1969001118 cites W2140341698 @default.
- W1969001118 cites W2518851438 @default.
- W1969001118 cites W3216361837 @default.
- W1969001118 doi "https://doi.org/10.1016/0021-9517(91)90289-g" @default.
- W1969001118 hasPublicationYear "1991" @default.
- W1969001118 type Work @default.
- W1969001118 sameAs 1969001118 @default.
- W1969001118 citedByCount "62" @default.
- W1969001118 countsByYear W19690011182014 @default.
- W1969001118 countsByYear W19690011182015 @default.
- W1969001118 countsByYear W19690011182016 @default.
- W1969001118 countsByYear W19690011182017 @default.
- W1969001118 countsByYear W19690011182018 @default.
- W1969001118 countsByYear W19690011182019 @default.
- W1969001118 countsByYear W19690011182022 @default.
- W1969001118 crossrefType "journal-article" @default.
- W1969001118 hasAuthorship W1969001118A5047613419 @default.
- W1969001118 hasConcept C127413603 @default.
- W1969001118 hasConcept C145148216 @default.
- W1969001118 hasConcept C147789679 @default.
- W1969001118 hasConcept C150394285 @default.
- W1969001118 hasConcept C153642686 @default.
- W1969001118 hasConcept C160892712 @default.
- W1969001118 hasConcept C161790260 @default.
- W1969001118 hasConcept C175708663 @default.
- W1969001118 hasConcept C177293861 @default.
- W1969001118 hasConcept C178790620 @default.
- W1969001118 hasConcept C179104552 @default.
- W1969001118 hasConcept C185592680 @default.
- W1969001118 hasConcept C42360764 @default.
- W1969001118 hasConcept C56052488 @default.
- W1969001118 hasConcept C8010536 @default.
- W1969001118 hasConceptScore W1969001118C127413603 @default.
- W1969001118 hasConceptScore W1969001118C145148216 @default.
- W1969001118 hasConceptScore W1969001118C147789679 @default.
- W1969001118 hasConceptScore W1969001118C150394285 @default.
- W1969001118 hasConceptScore W1969001118C153642686 @default.
- W1969001118 hasConceptScore W1969001118C160892712 @default.
- W1969001118 hasConceptScore W1969001118C161790260 @default.
- W1969001118 hasConceptScore W1969001118C175708663 @default.
- W1969001118 hasConceptScore W1969001118C177293861 @default.
- W1969001118 hasConceptScore W1969001118C178790620 @default.
- W1969001118 hasConceptScore W1969001118C179104552 @default.
- W1969001118 hasConceptScore W1969001118C185592680 @default.
- W1969001118 hasConceptScore W1969001118C42360764 @default.
- W1969001118 hasConceptScore W1969001118C56052488 @default.
- W1969001118 hasConceptScore W1969001118C8010536 @default.
- W1969001118 hasIssue "2" @default.
- W1969001118 hasLocation W19690011181 @default.
- W1969001118 hasOpenAccess W1969001118 @default.
- W1969001118 hasPrimaryLocation W19690011181 @default.
- W1969001118 hasRelatedWork W103543964 @default.
- W1969001118 hasRelatedWork W1972401468 @default.
- W1969001118 hasRelatedWork W1994056495 @default.
- W1969001118 hasRelatedWork W2000344554 @default.
- W1969001118 hasRelatedWork W2001525226 @default.
- W1969001118 hasRelatedWork W2040906673 @default.
- W1969001118 hasRelatedWork W2074507056 @default.
- W1969001118 hasRelatedWork W2081160365 @default.
- W1969001118 hasRelatedWork W2358724321 @default.
- W1969001118 hasRelatedWork W3089936095 @default.
- W1969001118 hasVolume "128" @default.
- W1969001118 isParatext "false" @default.
- W1969001118 isRetracted "false" @default.
- W1969001118 magId "1969001118" @default.
- W1969001118 workType "article" @default.