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Micro‐/Mesoporous Platinum–SiCN Nanocomposite Catalysts (Pt@SiCN): From Design to Catalytic Applications
Author(s) -
Sachau Sabrina M.,
Zaheer Muhammad,
Lale Abhijeet,
Friedrich Martin,
Denner Christine E.,
Demirci Umit B.,
Bernard Samuel,
Motz Günter,
Kempe Rhett
Publication year - 2016
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201603266
Subject(s) - materials science , nanocomposite , mesoporous material , sodium borohydride , chemical engineering , catalysis , nanoparticle , platinum nanoparticles , platinum , amorphous solid , composite material , nanotechnology , organic chemistry , chemistry , engineering
The synthesis, characterization, and catalytic studies of platinum (Pt) nanoparticles (NPs) supported by a polymer‐derived SiCN matrix are reported. In the first step and under mild conditions (110 °C), a block copolymer (BCP) based on hydroxyl‐group‐terminated linear polyethylene (PEOH) and a commercially available polysilazane (PSZ: HTT 1800) were synthesized. Afterwards, the BCP was microphase separated, modified with an aminopyridinato (Ap) ligand‐stabilized Pt complex, and cross‐linked. The green bodies thus obtained were pyrolyzed at 1000 °C under nitrogen and provided porous Pt@SiCN nanocomposite via decomposition of the PEOH block while Pt nanoparticles grew in situ within the SiCN matrix. Powder X‐ray diffraction (PXRD) studies confirmed the presence of the cubic Pt phase in the amorphous SiCN matrix whereas transmission electron microscopy (TEM) measurements revealed homogeneously distributed Pt nanoparticles in the size of 0.9 to 1.9 nm. N 2 sorption studies indicated the presence of micro‐ and mesopores. Pt@SiCN appears to be an active and robust catalyst in the hydrolysis of sodium borohydride under harsh conditions.