Abstract
The development of green and sustainable protocols for synthetic routes is a growing area of research in chemistry worldwide. The development of sustainable processes and products through innovative catalytic materials and technologies, that allow a better use of resources, is undoubtedly a very important issue facing research chemists today. Environmentally and economically advanced catalytic processes for selective alkane oxidations reactions, as is the case of cyclohexane oxidation, are now focused on catalysts’ stability and their reuse, intending to overcome the drawbacks posed by current homogeneous systems. The aim of this short review is to highlight recent contributions in heterogeneous catalysis regarding porous support materials to be applied to cyclohexane oxidation reaction. Different classes of porous materials are covered, from carbon nanomaterials to zeolites, mesoporous silicas, and metal organic frameworks. The role performed by the materials to be used as supports towards an enhancement of the activity/selectivity of the catalytic materials and the ability of recycling and reuse in consecutive catalytic cycles is highlighted.
Highlights
Catalysis plays a key role in several industries, such as energy and fuels, pharmaceuticals, fine chemicals, and commodity chemicals
The inherent challenging and difficult separation and recovery of the catalysts in homogeneous catalytic systems have urged the development of heterogeneous systems that have been a priority of researchers in the field of green chemistry
After the first catalytic run, a decrease of about half of the initial content of Fe was determined for FeCl2 the same C-scorpionate complex [FeCl (Tpm)@MOR-D, which indicated the occurrence of leaching during the catalytic reaction or catalyst recovery process, pointing out a weak type of electrostatic interaction between the complex and the support
Summary
Catalysis plays a key role in several industries, such as energy and fuels, pharmaceuticals, fine chemicals, and commodity chemicals. The inherent challenging and difficult separation and recovery of the catalysts in homogeneous catalytic systems have urged the development of heterogeneous systems that have been a priority of researchers in the field of green chemistry. Heterogeneous catalysts are unquestionably a vital tool for the conversion of petroleum and natural gas on efficient fuels as well as more environmentally friendly energy sources, including hydrogen and biofuels. The development of homogeneous catalysts for the selective oxidation of cyclohexane, a reaction of extreme importance in the chemical industry, has been an extensively investigated topic. The need for environmentally benign and economic catalysts that can offer a good efficiency and are selective towards the sustainable development of such important oxidation process is urgent
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