Micro‐/Mesoporous Platinum–SiCN Nanocomposite Catalysts (Pt@SiCN): From Design to Catalytic Applications |
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| Authors: | Sabrina M Sachau Dr Muhammad Zaheer Abhijeet Lale Martin Friedrich Dr Christine E Denner Prof Umit B Demirci Dr Samuel Bernard Dr Günter Motz Prof?Dr Rhett Kempe |
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| Institution: | 1. Lehrstuhl Anorganische Chemie II, Universit?t Bayreuth, Bayreuth, Germany;2. Department of Chemistry, SBA School of Science and Engineering, Lahore University of Management Sciences (LUMS), Lahore, Pakistan;3. IEM (Institut Europeen des Membranes), UMR 5635 (CNRS-ENSCM-UM), Universite Montpellier, Montpellier, France;4. Lehrstuhl Keramische Werkstoffe, Universit?t Bayreuth, Bayreuth, Germany |
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| Abstract: | 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. N2 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. |
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| Keywords: | block copolymers ceramics mesoporous materials self-assembly supported catalysts |
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