Metal oxides, particularly metal oxides having semiconducting properties, are effective catalysts for oxidation-reduction reactions. Industrial catalysts typically contain more than one metal oxide component, referred to as a composite metal oxide catalyst. In general, at least one of them is a transition metal oxide, and molecular-level mixing is formed between the components, and interaction occurs to adjust the electrical properties and surface acidity of the catalyst, and to improve catalytic activity and selectivity. There are two kinds of decomposition products of metal oxides: 1 The general rule of the reaction of decomposition into metal element and oxygen is that the more active the metal, the more stable the oxide is formed and the more difficult it is to decompose; on the contrary, it is easy to decompose. Only the oxides formed by inactive metals, such as oxidized mercury, silver oxide, etc., are decomposed by thermal energy; and some metal oxides are electrically decomposed in the molten state. 2 high-priced metal oxides decompose into low-oxides and oxygen when heated
    
    
    
        
    
    
    
        
            
                
                
                    
                        
                        
                        
                        
                        
                        
                            
                                
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                                    Amino compound
                                    
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                                    Oxy-containing amino compound
                                    
                                    
                                    Cycloalkylamines, aromatic monoamines, aromatic polyamines and derivatives and salts thereof
                                    
                                    
                                    Acyclic monoamines, polyamines and their derivatives and salts
                                    
                                    
                                    Amide compound
                                    
                                    
                                    Sulfonic acid amino compound
                                    
                                    
                                
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                                    Alcohols, phenols, phenolic compounds and derivatives
                                    
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                                    2-cycloalcohol
                                    
                                    
                                    Halogenated, sulfonated, nitrated or nitrosated derivatives of alcohols
                                    
                                    
                                    Extremely halogenated, sulfonated, nitrated or nitrosated derivatives of phenols
                                    
                                    
                                    Phenol and its halogenated, sulfonated, nitrated or nitrosated derivatives
                                    
                                    
                                    Acyclic alcohol
                                    
                                    
                                
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                                    Nitrogen-containing compound
                                    
                                    
                                
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                                    Nitrile compound
                                    
                                    
                                
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                                    Organic derivative of hydrazine or hydrazine
                                    
                                    
                                
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                                    Terpenoid
                                    
                                    
                                
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                                    Ether compounds and their derivatives
                                    
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                                    Ether, ether alcohol
                                    
                                    
                                    Halogenation, sulfonation, nitration or nitrosation of ethers, ether alcohols, ether phenols
                                    
                                    
                                
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                                    Aldehyde
                                    
                                    
                                
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                                    Carboxylic compounds and derivatives
                                    
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                                    Cyclic carboxylic acid
                                    
                                    
                                    Halogenation, sulfonation, nitration or nitrosation of carboxylic acids
                                    
                                    
                                    Halogenation, sulfonation, nitration or nitration of carboxylic anhydrides
                                    
                                    
                                    Carboxylic acid halide
                                    
                                    
                                    Carboxylic esters and their derivatives
                                    
                                    
                                    Salt of carboxylic acid ester and its derivatives
                                    
                                    
                                    Acyclic carboxylic acid
                                    
                                    
                                
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                                    Hydrocarbon compounds and their derivatives
                                    
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                                    Aromatic hydrocarbon
                                    
                                    
                                    Cyclic hydrocarbon
                                    
                                    
                                    Hydrocarbon sulfonate
                                    
                                    
                                    Hydrocarbon halide
                                    
                                    
                                    Hydrocarbon nitrite
                                    
                                    
                                    Acyclic hydrocarbon
                                    
                                    
                                
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                                    Ketone compound
                                    
                                    
                                
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                                    Alkyl ureas and their derivatives and salts
                                    
                                    
                                
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                                    Inorganic acid ester
                                    
                                    
                                
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                                    Heterocyclic compound
                                    
                                    
                                
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                                    Diazo, azo or azo compound
                                    
                                    
                                
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                                    Organosilicon compound
                                    
                                    
                                
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                                    Organometallic compound
                                    
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                                    Organic palladium
                                    
                                    
                                    Organic germanium, cobalt, strontium, barium, gallium, germanium, germanium, germanium, germanium, etc.
                                    
                                    
                                    Organic calcium
                                    
                                    
                                    Zirconium
                                    
                                    
                                    Organic potassium
                                    
                                    
                                    Organic
                                    
                                    
                                    Organic lithium
                                    
                                    
                                    Organic
                                    
                                    
                                    Organic aluminum
                                    
                                    
                                    Organotin
                                    
                                    
                                    Organic manganese
                                    
                                    
                                    Organic sodium
                                    
                                    
                                    Organic nickel
                                    
                                    
                                    Organic titanium
                                    
                                    
                                    Organic iron
                                    
                                    
                                    Organic copper
                                    
                                    
                                    Organotin
                                    
                                    
                                    Organic zinc
                                    
                                    
                                    Organic
                                    
                                    
                                    Organic
                                    
                                    
                                    Organic germanium, mercury, silver, platinum, etc.
                                    
                                    
                                    Organic germanium, antimony, bismuth, tungsten, antimony, bismuth, lead, vanadium, molybdenum, chromium, antimony, etc.
                                    
                                    
                                
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                                    Organic sulfur compound
                                    
                                    
                                
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                                    Organic phosphine compound
                                    
                                    
                                
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                                    Organometallic salt
                                    
                                    
                                
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                                    Organic fluorine compound
                                    
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                                    Fluorobenzoic acid series
                                    
                                    
                                    Fluorobenzonitrile series
                                    
                                    
                                    Fluorobenzaldehyde series
                                    
                                    
                                    Fluorobenzyl alcohol series
                                    
                                    
                                    Fluoroanisole series
                                    
                                    
                                    Fluoroaniline series
                                    
                                    
                                    Fluorophenylacetic acid series
                                    
                                    
                                    Fluorophenol series
                                    
                                    
                                    Fluorobenzoic acid series
                                    
                                    
                                    Fluoronitrobenzene series
                                    
                                    
                                    Fluoropyridine series
                                    
                                    
                                    Potassium fluoroborate series
                                    
                                    
                                    Fluorobenzyl alcohol series
                                    
                                    
                                    Fluorotoluene series
                                    
                                    
                                    Fluorine red series
                                    
                                    
                                    Fluoroethane series
                                    
                                    
                                    Fluoropropane series