View in EDS

Supported-induced effect on the catalytic properties of Rh and Pt-Rh particles deposited on La2O3 and mixed α-Al2O3-La2O3 in the dry reforming of methane.

Saved in:
Bibliographic Details
Title: Supported-induced effect on the catalytic properties of Rh and Pt-Rh particles deposited on La2O3 and mixed α-Al2O3-La2O3 in the dry reforming of methane.
Authors: Ghelamallah, Madani1 gh_madani@hotmail.com, Granger, Pascal2 pascal.granger@univ-lille1.fr
Source: Applied Catalysis A: General. Sep2014, Vol. 485, p172-180. 9p.
Subjects: Rhodium catalysts, Platinum-rhodium alloys, Lanthanum oxide, Aluminum oxide, Methane, Catalytic reforming
Abstract: Rhodium and platinum-rhodium based catalysts supported on La 2 O 3 and Al 2 O 3 doped with La 2 O 3 were investigated in the dry reforming of methane. The textural and structural properties were studied on calcined, reduced and used catalysts from nitrogen physisorption, X-ray diffraction, XPS, SEM, H 2 - and O 2 -temperature-programmed experiments. Rh is intrinsically more active than Pt independently of the support composition. Different types of interactions occur when Rh is incorporated in Pt on La 2 O 3 and La-modified α-Al 2 O 3 supports with the observations of synergistic effects on the activity of Pt-Rh/Al 2 O 3 -La 2 O 3 for methane conversion. Correlations between catalytic properties with structural and surface properties have been tentatively established and are discussed. A detrimental effect of alloyed Pt-Rh particles on La 2 O 3 and a beneficial effect on the catalytic activity of Pt-Rh/Al 2 O 3 -La 2 O 3 due to the formation of possible composite microstructures combining noble metals and the elements of the support is reported. [ABSTRACT FROM AUTHOR]
Copyright of Applied Catalysis A: General is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
Description
Abstract:Rhodium and platinum-rhodium based catalysts supported on La 2 O 3 and Al 2 O 3 doped with La 2 O 3 were investigated in the dry reforming of methane. The textural and structural properties were studied on calcined, reduced and used catalysts from nitrogen physisorption, X-ray diffraction, XPS, SEM, H 2 - and O 2 -temperature-programmed experiments. Rh is intrinsically more active than Pt independently of the support composition. Different types of interactions occur when Rh is incorporated in Pt on La 2 O 3 and La-modified α-Al 2 O 3 supports with the observations of synergistic effects on the activity of Pt-Rh/Al 2 O 3 -La 2 O 3 for methane conversion. Correlations between catalytic properties with structural and surface properties have been tentatively established and are discussed. A detrimental effect of alloyed Pt-Rh particles on La 2 O 3 and a beneficial effect on the catalytic activity of Pt-Rh/Al 2 O 3 -La 2 O 3 due to the formation of possible composite microstructures combining noble metals and the elements of the support is reported. [ABSTRACT FROM AUTHOR]
ISSN:0926860X
DOI:10.1016/j.apcata.2014.07.021