Tuning the textural and surface properties of carbon xerogels to be used as supports for gold catalysts

• Autorzy: Xuelian Xu , Junjiang Zhu , Joaquim Faria , Jinlin Li , José Figueiredo
• Języki publikacji: EN

Abstrakty

EN

Carbon xerogels (CXs) synthesized from resorcinol and formaldehyde under different pH conditions were investigated. Both the textural and surface properties of the CXs depend closely on the pH used in the synthesis procedure. Concerning the texture, the mesoporous surface area (Smeso) increases and the micropore volume (Vmicro) decreases as the pH increases; concerning the surface chemistry, surface oxygen functional groups were easier to be created (by O2) on CX synthesized at lower pH. Application of these CXs as support of gold catalysts was also studied. Results showed that the oxygen activated CX that was synthesized at moderate pH (i.e., pH 6.0) was the most favorable support for gold catalysts used in selective oxidation of benzyl alcohol by molecular oxygen in liquid phase, due to the adequate amounts of surface oxygen functional groups created on the surface. [...]

Słowa kluczowe

EN

Carbon xerogels; pH values; TPD; Gold Catalyst; Alcohol Oxidation

• Czasopismo: Open Chemistry
• Rocznik: 2012
• Tom: 10
• Numer: 6
• Strony: 1867-1874

Daty

wydano

2012-12-01

online

2012-09-21

Twórcy

autor

Xuelian Xu

• Key Laboratory of Catalysis and Materials Science of the State Ethnic Affairs Commission & Ministry of Education, South-central University for Nationalities, Wuhan, 430074, Hubei, China

autor

Junjiang Zhu

• Key Laboratory of Catalysis and Materials Science of the State Ethnic Affairs Commission & Ministry of Education, South-central University for Nationalities, Wuhan, 430074, Hubei, China,

autor

Joaquim Faria

• LCM — Laboratory of Catalysis and Materials — Associate Laboratory LSRE/LCM, Faculty of Engineering, University of Porto, 4200-465, Porto, Portugal

autor

Jinlin Li

• Key Laboratory of Catalysis and Materials Science of the State Ethnic Affairs Commission & Ministry of Education, South-central University for Nationalities, Wuhan, 430074, Hubei, China

autor

José Figueiredo

• LCM — Laboratory of Catalysis and Materials — Associate Laboratory LSRE/LCM, Faculty of Engineering, University of Porto, 4200-465, Porto, Portugal,

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Identyfikatory

DOI

10.2478/s11532-012-0106-2