Micro-/Mesoporous Platinum-SiCN Nanocomposite Catalysts (Pt@SiCN): From Design to Catalytic Applications.
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. N2sorption 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.
Lehrstuhl Anorganische Chemie II, Universität Bayreuth, Universitätsstrasse 30, 95440, Bayreuth, Germany.
Sabrina M
SM
Sachau
Department of Chemistry, SBA School of Science and Engineering, Lahore University of Management Sciences (LUMS), 54792, Lahore, Pakistan. muhammad.zaheer@lums.edu.pk.
Muhammad
M
Zaheer
IEM (Institut Europeen des Membranes), UMR 5635 (CNRS-ENSCM-UM), Universite Montpellier, Place E. Bataillon, 34095, Montpellier, France.
Abhijeet
A
Lale
Lehrstuhl Anorganische Chemie II, Universität Bayreuth, Universitätsstrasse 30, 95440, Bayreuth, Germany.
Martin
M
Friedrich
Lehrstuhl Anorganische Chemie II, Universität Bayreuth, Universitätsstrasse 30, 95440, Bayreuth, Germany.
Christine E
CE
Denner
IEM (Institut Europeen des Membranes), UMR 5635 (CNRS-ENSCM-UM), Universite Montpellier, Place E. Bataillon, 34095, Montpellier, France.
Umit B
UB
Demirci
IEM (Institut Europeen des Membranes), UMR 5635 (CNRS-ENSCM-UM), Universite Montpellier, Place E. Bataillon, 34095, Montpellier, France.
Samuel
S
Bernard
Lehrstuhl Keramische Werkstoffe, Universität Bayreuth, Ludwig-Thoma-Straße 36b, 95447, Bayreuth, Germany.
Günter
G
Motz
Lehrstuhl Anorganische Chemie II, Universität Bayreuth, Universitätsstrasse 30, 95440, Bayreuth, Germany. kempe@uni-bayreuth.de.
Rhett
R
Kempe
block copolymers; ceramics; mesoporous materials; self-assembly; supported catalysts