1,3-Butadiene selective hydrogenation over Pd/alumina and CuPd/alumina catalysts

Furlong, B.; Hightower, Joe W.; Chan, Tammy Y.-L.; Sárkány, A.; Guczi, L.

doi:10.1016/0926-860x(94)80157-6

Cited by 89 publications

(49 citation statements)

References 15 publications

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“…This phenomenon of increase of selectivity and decrease of deactivation is probably related to the preferential migration of Pd atoms on well-defined sites. The same behavior of the Pd-Cu system in this reaction has been recently reported by Furlong et al (14). The authors attribute this effect to a decrease of hydrogen adsorption.…”

Section: Discussionsupporting

confidence: 88%

Properties of Supported Pd–Ni Catalysts Prepared by Coexchange and Organometallic Chemistry

Renouprez

Faudon

Massardier

et al. 1997

Journal of Catalysis

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Section: Discussionsupporting

confidence: 88%

Properties of Supported Pd–Ni Catalysts Prepared by Coexchange and Organometallic Chemistry

Renouprez

Faudon

Massardier

et al. 1997

Journal of Catalysis

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“…Thus, the determination of surface acidity is of great utility in the development of a detailed picture of the surface chemistry of this widely used metal oxide. The chemistry of γ -Al 2 O 3 , which is used as an industrial acid-base catalyst [3][4][5][6][7][8] and metallic catalyst support [9][10][11], depends on the surface composition, particularly the quantity, types, and acidity of the surface catalytic sites [12][13][14]. Perhaps, the most important sites are the surface hydroxyl groups because they provide the sites for Brønsted acid-catalyzed reactivity, as we have reported for the dimerization of 1,3-butadiene on hydroxylated thin films of γ -Al 2 O 3 [15,16].…”

Section: Introductionmentioning

confidence: 99%

Determination of surface OH acidity from the formation of acid/base complexes on ultrathin films of γ-Al2O3 on NiAl(100)

Layman

Hemminger

2004

Journal of Catalysis

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“…[7][8][9] Al 2 O 3 is also a major component of mineral dust and solid fuel rocket exhaust. As a result of its catalytic properties and abundance in the atmosphere, Al 2 O 3 may have an important role in the processing of air pollutants.…”

Section: Introductionmentioning

confidence: 99%

Pyridine Adsorption and Acid/Base Complex Formation on Ultrathin Films of γ-Al₂O₃ on NiAl(100)

2003

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Pyridine adsorption on NiAl(100) and ultrathin films of γ-Al 2 O 3 was studied using high-resolution electron energy loss spectroscopy (HREELS). Pyridine adsorbs on NiAl(100) with its molecular axis parallel to the surface plane at low coverages and with its molecular plane inclined more toward the surface normal at higher coverages. On the hydroxylated and nonhydroxylated thin films of γ-Al 2 O 3 , pyridine interacts with the coordinatively unsaturated Al 3+ cations via its nitrogen lone-pair electrons. Pyridine was also found to interact with the surface hydroxyl groups on the hydroxylated γ-Al 2 O 3 thin films, forming C 5 H 5 N-HO complexes. Complex formation causes the OH bond strength to decrease and the OH stretch vibration to shift from 3711 cm -1 , which is characteristic of uncomplexed, isolated OH, to lower frequency. At low coverages, pyridine only interacts with the more acidic surface OH groups, those located on 3-fold Al 3+ cation sites. This interaction forms a C 5 H 5 N-HO complex, which has an O-H stretch at 2920 cm -1 . As the coverage is increased, an additional C 5 H 5 N-HO complex is formed from an interaction between pyridine and the less acidic OH groups, which are bonded to 2 Al 3+ cations. The vibrational frequency for O-H stretch of this C 5 H 5 N-HO complex is 3150 cm -1 . As the intensities for the O-H stretches of the C 5 H 5 N-HO complexes increase, the intensity for the free O-H stretch at 3711 cm -1 decreases. The interaction with the surface hydroxyl groups is reversible, confirming that the observed shifts in the O-H stretching frequency result from the formation of weakly bonded acid-base complexes. While most of the pyridine desorbs from the γ-Al 2 O 3 thin films by 290 K, annealing the pyridine-dosed γ-Al 2 O 3 thin films to temperatures above 290 K, results in a small amount of pyridine dehydrogenation and the formation of surface OH groups with an O-H stretch at 3742 cm -1 .

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1,3-Butadiene selective hydrogenation over Pd/alumina and CuPd/alumina catalysts

Cited by 89 publications

References 15 publications

Properties of Supported Pd–Ni Catalysts Prepared by Coexchange and Organometallic Chemistry

Properties of Supported Pd–Ni Catalysts Prepared by Coexchange and Organometallic Chemistry

Determination of surface OH acidity from the formation of acid/base complexes on ultrathin films of γ-Al2O3 on NiAl(100)

Pyridine Adsorption and Acid/Base Complex Formation on Ultrathin Films of γ-Al₂O₃ on NiAl(100)

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1,3-Butadiene selective hydrogenation over Pd/alumina and CuPd/alumina catalysts

Cited by 89 publications

References 15 publications

Properties of Supported Pd–Ni Catalysts Prepared by Coexchange and Organometallic Chemistry

Properties of Supported Pd–Ni Catalysts Prepared by Coexchange and Organometallic Chemistry

Determination of surface OH acidity from the formation of acid/base complexes on ultrathin films of γ-Al2O3 on NiAl(100)

Pyridine Adsorption and Acid/Base Complex Formation on Ultrathin Films of γ-Al2O3 on NiAl(100)

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Pyridine Adsorption and Acid/Base Complex Formation on Ultrathin Films of γ-Al₂O₃ on NiAl(100)