Heterogeneous Catalysis

Towards robust alkane oxidation catalysts: electronic variations in non-heme iron(ii) complexes and their effect in catalytic alkane oxidation

“…[1][2][3][4] Despite several industrial applications such as the oxidation of cyclohexane and p-xylene, which use O 2 as the oxidant and manganese or cobalt based catalysts, the development of practical oxidation catalysts and a thorough mechanistic understanding of alkane oxidation processes continue to provide great challenges in catalysis research. A number of different classes of alkane oxidation catalysts have been developed during the last 50 years, including the cobalt and manganese acetate catalyst systems used industrially, 5 the heme-based iron complexes containing porphyrin-type ligands used in nature, 6,7 polyoxometalates [8][9][10] and more recently, non-heme iron based catalyst systems. [11][12][13][14][15][16][17] The metal catalysts are typically combined with oxidants, which can have different oxo transfer abilities 18 , for example H 2 O 2 , O 2 , ClO -, PhIO, O 3 or N 2 O, whereby the first two oxidants are economically and environmentally the most attractive oxidants.…”

Facile Immobilization of a Lewis Acid Polyoxometalate onto Layered Double Hydroxides for Highly Efficient N‐Oxidation of Pyridine‐Based Derivatives and Denitrogenation

“…The ability of oxygen transfer via the generation of peroxo species in polyoxometalate systems is well known and has been studied extensively by various groups previously. [35][36][37] …”

Halogen-free Friedel-Crafts Acylation of Toluene with Benzoic Anhydride over Insoluble Heteropoly Acid Catalyst

“…Heteropoly acids have attracted considerable attention because of their high surface area, high acidity and insolubility of their cesium salts 14) 16) . These characteristics suggest the possibility of using heterogeneous strong acid catalysts in a liquid phase 17) . Izumi et al 8) and Castro et al 6), 9) conducted catalytic acylation using organic acid as acylating agents over heteropoly acids and suggested the possibility of chlorine free acylation.…”