The Exchange Reaction of Oxygen Atoms between Oxygen and Carbon Dioxide on Metal Oxides of the Fourth Period of the Periodic System

Abstract

The exchange reactions of oxygen atoms between oxygen and carbon dioxide on metal oxides were studied by the static batch method in the temperature range from

Catalytic Oxidations in Dense Carbon Dioxide

“…However, oxygen-exchange between CO 2 and O 2 has been observed over certain metal oxides. Kiyoura, for example, reported that the catalytic activity of metal oxides for the oxygen-exchange at 150−600 °C increases in the order of TiO 2 < V 2 O 5 < Cr 2 O 3 < Fe 2 O 3 < NiO < MnO 2 < Co 3 O 4 . Iwata and co-workers also described the 15 O-exchange reactions between CO 2 and O 2 over copper- and manganese-mixed oxide .…”

“…Kiyoura, for example, reported that the catalytic activity of metal oxides for the oxygen-exchange at 150-600 °C increases in the order of TiO 2 < V 2 O 5 < Cr 2 O 3 < Fe 2 O 3 < NiO < MnO 2 < Co 3 O 4 . 15 Iwata and co-workers also described the 15 O-exchange reactions between CO 2 and O 2 over copper-and manganese-mixed oxide. 16 These exchange reactions are suggested to involve the oxygenexchange between metal oxides and gases (CO 2 and O 2 ), as shown in Scheme 1.…”

Surface and bulk reactions of carbon tetrachloride with titanium dioxide

“…Since no band at 1820 cm-1 is detected at moderate temperature, chemisorption of phosgene according complex II must be followed by a rapid reaction which produces gaseous C02. The solid is then partially chlorinated and its chlorine content is about 4 Cl/ 100 Á2.…”

“…The oxidation of hydrocarbons is generally catalyzed by transition metals or their oxides. The catalytic activity of these oxides is mainly determined by the bond energy, i.e., the mobility of oxygen in the surface layer.1 Until now, different types of superficial reactions have been studied to obtain information on the reactivity of superficial oxygen atoms: homomolecular exchange le02(g) 1802(g)1-3 and ls02(g) C1602(g), 4 heteromolecular exchange ls02(g) 160(s), catalytic transfer of oxygen between CO and C02,6 reduction of solids by CO6 or H2. 7 From this standpoint, the study of carbon tetrachloride oxidation by mean of superficial oxygen atoms of a solid offers a double advantage.…”