Results 261 to 270 of about 24,536 (272)

Preparation of Pt°/MCM-41: effect of drying on MCM-41 structure and Pt° dispersion

2006
1. Abstract Pt°/MCM-41 catalysts were prepared by electrostatic adsorption of Pt(NH3)42+ at pH=8, followed by calcination under O2 and reduction. This procedure allows to prepare highly dispersed Pt° nanoparticles (D>76%), but has the drawback to modify significantly the structure of the ordered mesoporous support during the washing-drying step ...
Zhu, Baichun, Letellier, Franck, Blanchard, Juliette, Fajerwerg, Katia, Louis, Catherine, Guillaume, Denis, Uzio, Denis, Breysse, Miehèle   +7 more
openaire   +1 more source

Synthesis and characterization of bimetallic Ga,Al-MCM-41 and Fe,Al-MCM-41

2002
The structural and acidic properties of bimetallic Fe,Al-MCM-41 and Ga,Al-MCM-41 were compared with the Al-MCM-41. The competitive presence of Al and Fe/Ga in the MCM-41 walls and the formation of extra-framework Al and Fe/Ga species induces changes in the nature of the acid sites and therefore of their catalytic properties.
openaire   +1 more source

Al-MCM-41 and Pt/H3PW12O40/Al-MCM-41: structure characterization and catalytic properties

2008
Abstract The impregnation of H 3 PW 12 O 40 (referred as HPW) heteropolyacid on the Al-MCM-41 solid noticeably enhances by 2–3 times the Bronsted acidity with respect to the bare host. Catalytic evaluation confirms that 1wt %Pt/25wt.%HPW/Al-MCM-41 catalyst is active for n-heptane isomerization in the presence of hydrogen under atmospheric condition.
openaire   +1 more source

???????????????????????????????? ?????????????????????? ?????????????????????????????????? ?????????????????? TS-1/MCM-41

2011
?????????? ?????????????????? ???????????????????? ???????? ??? ???????????????????? ?????????????? TS-1 ?? ?????????????????? ??????-41 ?? ???????????????? ?????????????????????? ?????????????? ???????????????? ?????????????????????????????????? ?????????????????????? ????????????????????????????, ?????????????????????? ???? ????????????????????-??????
openaire   +1 more source

Metal Ion-Planted MCM-41

Journal of Catalysis, 1998
Maki Yonemitsu, Yasuhiro Tanaka, Masakazu Iwamoto   +2 more
openaire   +1 more source

Chiral Mesostructured Silica Nanofibers of MCM‐41

Angewandte Chemie, 2006
Bo, Wang, Cheng, Chi, Wei, Shan, Yahong, Zhang, Nan, Ren, Wuli, Yang, Yi, Tang   +6 more
openaire   +2 more sources

MCM-41

Chimie nouvelle, 1999
openaire   +1 more source

Dehydrogenation Reactions on MCM-41

1998
openaire   +1 more source

MCM-41 AND AL-20-MCM-41 CATALYZED AMINE COUPLING REACTIONS: A KINETIC STUDY

European Chemical Bulletin
openaire   +1 more source

Utilizzi farmaceutici di MCM-41

2009
AMBROGI, Valeria, PERIOLI, Luana
openaire   +1 more source