Abstract
We report the synthesis of Ni/SiOCN ceramic nanocomposites with high surface area as catalysts for carbon dioxide and methane conversion.
Highlights
Silicon-based polymer-derived ceramics (PDCs) have been synthesized in single- and multi-phase as well as nanocomposite structures by thermal pyrolysis of organosilicon polymer precursors denoted as preceramic polymers.[29,30,31] Metal-containing PDC nanocomposites have been commonly prepared by direct mixing of preceramic polymers with metal/metal oxide powders, followed by thermolysis under a controlled atmosphere.[32,33,34,35] this approach2021 The Author(s)
Silicon-based PDCs have been synthesized in single- and multi-phase as well as nanocomposite structures by thermal pyrolysis of organosilicon polymer precursors denoted as preceramic polymers.[29,30,31]
A remarkable decrease in the intensity of absorption bands corresponding to Si–H and –NH– groups is observed in the ATR-FTIR spectra of synthesized Du1800-Ni and PHPS-Ni precursors
Summary
Silicon-based PDCs have been synthesized in single- and multi-phase as well as nanocomposite structures by thermal pyrolysis of organosilicon polymer precursors denoted as preceramic polymers.[29,30,31] Metal-containing PDC nanocomposites have been commonly prepared by direct mixing of preceramic polymers with metal/metal oxide powders, followed by thermolysis under a controlled atmosphere.[32,33,34,35] this approach2021 The Author(s). The in situ formation of metal nanoparticles during the synthesis of the microporous/mesoporous PDC matrix has been alternatively applied This approach can be achieved by the thermolysis of (i) commercially available metallopolymers or (ii) organosilicon polymers modified by metallorganic compounds. Motz et al have developed a molecular approach to incorporate transition metals (e.g. Fe, Ni, Cu, and Pt) into the PDC matrix by the chemical modification of polysilazane HTT1800 with aminopyridinato metal complexes.[25,41,42,43] In situ formation of nickel nanoparticles during the reaction of the polysilazane HTT1800 polymer with trans-[bis(2-aminoethanol-N,O)diacetato-nickel(II)] in an ice bath under an argon atmosphere appeared to be a quite complex process due to the complicated and time-consuming synthesis of the nickel(II)-containing complex.[44,45]
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