Design of Al2O3/CoAlO/CoAl Porous Ceramometal for Multiple Applications as Catalytic Supports

Authors :: Andreev, Andrey S.
Tikhov, Serguey F.
Salanov, Aleksey N.
Cherepanova, Svetlana V.
Lapina, Olga B.
Bolotov, Vasiliy A.
Tanashev, Yuriy Yu.
d’Espinose de Lacaillerie, Jean Baptiste
Sadykov, Vladislav A.
Source :: Advanced Materials Research; May 2013, Vol. 702 Issue: 1 p79-87, 9p
Publication Year :: 2013
Abstract: Porous ceramometal Al<subscript>2</subscript>O<subscript>3</subscript>/CoAlO/CoAl was studied by set of physicochemical techniques such as XRD, SEM, internal field <superscript>59</superscript>Co and <superscript>27</superscript>Al MAS NMR, and porosity measurements. They revealed the cermet containing three parts. First, cobalt-free large porous alumina particles which surrounded by the second oxide part representing spinel Co<subscript>x</subscript>Al<subscript>3-x</subscript>O<subscript>4</subscript> (x=1,2,3) oxides. And third, oxygen-free metallic part consists of cobalt metal particles covered by Co-Al oxide protecting the metallic part from oxidation. Porosity measurements ascertained high porosity (60%) and good SSA (122 m<superscript>2</superscript>/g). Also the enhanced adsorption of microwaves due to metallic particles randomly distributed in oxides was found.

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