caa a22 4500 477091946 CHVBK 20180405111517.0 cr unu---uuuuu 170330e19960901xx s 000 0 eng 10.1007/BF01134029 doi (NATIONALLICENCE)springer-10.1007/BF01134029 Effects of thermal treatments on the textural properties of chromium oxides CrO x obtained by oxalate decomposition [Elektronische Daten] [D. André, A. Rousset] The porosity of oxides has an influence on their catalytic activity. An accurate knowledge of the effects of thermal treatments on the textural characteristics of oxides obtained by precursors decomposition is therefore an essential step. The porosity of the studied chromium oxides was analyzed by nitrogen adsorption-desorption measurements. Decomposition under air at 310-340°C of chromium oxalate allowed us to obtain more or less microporous X-ray amorphous chromium oxides, CrO x (x ≈ 2), according to the heating and cooling rates and the treatment temperatures used. The oxides obtained from chromium hydroxides were mesoporous and had lower specific surface areas. Using high heating and cooling rates for the oxalate decomposition, the prepared chromium oxides were more microporous. By this way, the control of the textural properties of the resulting oxides is possible. Kluwer Academic Publishers, 1996 chromium oxalate nationallicence chromium oxide CrO x nationallicence nitrogen adsorption-desorption nationallicence porosity nationallicence André D. Laboratoire de Chimie des Matériaux Inorganiques, URA-CNRS 1311, Université Paul Sabatier, 118 route de Narbonne, 31062, Toulouse cedex, France aut Rousset A. Laboratoire de Chimie des Matériaux Inorganiques, URA-CNRS 1311, Université Paul Sabatier, 118 route de Narbonne, 31062, Toulouse cedex, France aut Journal of Porous Materials Kluwer Academic Publishers 3/3(1996-09-01), 175-180 1380-2224 3:3<175 1996 3 10934 https://doi.org/10.1007/BF01134029 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF01134029 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- André D. Laboratoire de Chimie des Matériaux Inorganiques, URA-CNRS 1311, Université Paul Sabatier, 118 route de Narbonne, 31062, Toulouse cedex, France aut NATIONALLICENCE 700 1- Rousset A. Laboratoire de Chimie des Matériaux Inorganiques, URA-CNRS 1311, Université Paul Sabatier, 118 route de Narbonne, 31062, Toulouse cedex, France aut NATIONALLICENCE 773 0- Journal of Porous Materials Kluwer Academic Publishers 3/3(1996-09-01), 175-180 1380-2224 3:3<175 1996 3 10934 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer