Ultrafine metal-polymer catalysts based on polyconjugated systems for Fisher–Tropsch synthesis

Abstract

<jats:title>Abstract</jats:title><jats:p>For previously studied Fischer–Tropsch nanosized Fe catalyst slurries, polymer compounds with or without polyconjugating structures are used as precursors to form the catalyst nanomatrix in situ, and several catalytic experiments and X-ray diffraction and atomic force microscopy measurements are performed. The important and different roles of the paraffin molecules in the slurry medium in the formation and function of composite catalysts with the two types of aforementioned polymer matrices are revealed. In the case of the polyconjugated polymers, the alkanes in the medium are “weakly” coordinated with the metal-polymer composites, which does not affect the effectiveness of the polyconjugated polymers. Otherwise, alkane molecules form a “tight” surface layer around the composite particles, which create transport complications for the reagents and products of Fischer-Tropsch synthesis and, in some cases, can change the course of the in situ catalyst formation.</jats:p>

Catalytic Design of Matrix-Isolated Ni-Polymer Composites for Methane Catalytic Decomposition

“…When monodisperse nickel atoms are deposited on the nanosheets, a heterogeneous catalyst with unprecedented catalytic activity and selectivity for the reduction of 4-nitrophenol to 4-aminophenol under mild conditions is formed. According to the authors [42,43], in the case of the process of carbon monoxide hydrogenation, which forms the composite during the synthesis, the polyconjugated matrix that is formed interacts with the active metal-containing particles, promoting an enhancing effect and increasing the activity of composite catalysts.…”