II. Structure of Perovskites 1982 A. Crystal Structure 1982 B. Nonstoichiometry in Perovskites 1983 1. Oxygen Nonstoichiometry 1983 2. Cation Nonstoichiometry 1984 C. Physical Properties 1985 D. Adsorption Properties 1986 1. CO and NO Adsorption 1986 2. Oxygen Adsorption 1987 E. Specific Surface and Porosity 1987 F. Thermal Stability in a Reducing Atmosphere 1989 III. Acid−Base and Redox Properties 1990 A. Acidity and Basicity 1990 B. Redox Processes 1991 1. Kinetics and Mechanisms 1992 2. Reduction−Oxidation Cycles 1993 C. Ion Mobility 1993 1. Oxygen Transport 1993 2. Cation Transport 1994 IV. Heterogeneous Catalysis 1995 A. Oxidation Reactions 1995 1. CO Oxidation 1995 2. Oxidation of Hydrocarbons 1996 B. Pollution Abatement 2001 1. NOx Decomposition 2001 2. Exhaust Treatment 2002 3. Stability 2004 C. Hydrogenation and Hydrogenolysis Reactions 2004 1. Hydrogenation of Carbon Oxides 2004 2. Hydrogenation and Hydrogenolysis Reactions 2006

Chemical structures and performance of perovskite oxides.

Synthesis of Methanol

Publisher Summary This chapter discusses the structure and reactivity of perovskite-type oxides. Perovskite-type oxides have the general formula ABO 3 (A, cation of larger size) and are structurally similar to CaTiO 3 , the mineral that gave its name to that group of compounds. These materials are first studied because of their important physical properties such as ferro-, piezo-, and pyroelectricity, magnetism and electrooptic effects. The most numerous and most interesting compounds with the perovskite structure are oxides. Some hydrides, carbides, halides, and nitrides also crystallize with this structure. The chapter reviews only the study of oxides and their behavior in the gas solid interface and in heterogeneous catalysis. An important characteristic of perovskites, mentioned in the chapter, is their susceptibility of partial substitution in both A and B positions. This provides a wealth of isomorphic compounds that can easily be synthesized. Given the extensive range of possibilities in the tailoring of their chemical and physical properties, there is no doubt that new reactions can be studied, where these oxides can participate as catalytic agents.

Structure and Reactivity of Perovskite-Type Oxides

Kinetics of low-pressure methanol synthesis

Copper-Zinc Oxide-Alumina Methanol Catalysts Revisited

Synthesis, characterization, and catalytic activity of LaRhO3

A study of the catalytically active copper species in the synthesis of methanol over CuCr oxide

Interaction of H2 and CO with Rh4(CO)12 supported on ZnO

Effect of CO2 on the conversion of H2/CO to methanol over copper-chromia catalysts

Evidence for the stabilization of copper(I) in Cu-Cr oxide methanol catalysts

G. Apai

Papers

Synthesis, characterization, and catalytic activity of LaRhO3

A study of the catalytically active copper species in the synthesis of methanol over CuCr oxide

Interaction of H2 and CO with Rh4(CO)12 supported on ZnO

Effect of CO2 on the conversion of H2/CO to methanol over copper-chromia catalysts

Evidence for the stabilization of copper(I) in Cu-Cr oxide methanol catalysts