TY - JOUR
T1 - Preparation of microporous polymer-encapsulated Pd nanoparticles and their catalytic performance for hydrogenation and oxidation
AU - Ishida, Tamao
AU - Onuma, Yuta
AU - Kinjo, Kota
AU - Hamasaki, Akiyuki
AU - Ohashi, Hironori
AU - Honma, Tetsuo
AU - Akita, Tomoki
AU - Yokoyama, Takushi
AU - Tokunaga, Makoto
AU - Haruta, Masatake
N1 - Funding Information:
This work was financially supported by Hayashi Female Foundation and Tokuyama Science Foundation . The synchrotron radiation experiments were performed at the BL14B2 of the SPring-8 with approval of the JASRI (proposal No. 2011B1001). 13 C CP-MAS NMR measurements were performed at the Center of Advanced Instrumental Analysis, Kyushu University. HAADF-STEM observations were partly performed at the Research Laboratory for High Voltage Electron Microscopy (HVEM), Kyushu University.
PY - 2014/9/9
Y1 - 2014/9/9
N2 - Palladium nanoparticles (Pd NPs) encapsulated by conjugated microporous polymers (CMPs) were prepared by the Pd-catalyzed polymerization followed by a thermal treatment with N2 or H2. The Pd catalysts were embedded in the porous network during polymerization and used as a precursor for the generation of Pd NPs in CMP. Although no Pd NPs were formed in the as-synthesized Pd/CMPs, Pd NPs with 1.6-3.5 nm size were formed after the thermal treatment. The obtained Pd/CMP-N2 and -H2 catalysts were highly selective in the hydrogenation of 4-nitrostyrene to 4-ethylnitrobenzene, whereas Pd NPs supported on carbon (Ketjen black) gave a fully reduced product, 4-ethylaniline. Substituents in CMP framework could change the catalytic activity of Pd NPs; hydroxy-substituted CMP encapsulated Pd NPs showed higher catalytic activity than Pd/CMP-H2 for benzyl alcohol oxidation.
AB - Palladium nanoparticles (Pd NPs) encapsulated by conjugated microporous polymers (CMPs) were prepared by the Pd-catalyzed polymerization followed by a thermal treatment with N2 or H2. The Pd catalysts were embedded in the porous network during polymerization and used as a precursor for the generation of Pd NPs in CMP. Although no Pd NPs were formed in the as-synthesized Pd/CMPs, Pd NPs with 1.6-3.5 nm size were formed after the thermal treatment. The obtained Pd/CMP-N2 and -H2 catalysts were highly selective in the hydrogenation of 4-nitrostyrene to 4-ethylnitrobenzene, whereas Pd NPs supported on carbon (Ketjen black) gave a fully reduced product, 4-ethylaniline. Substituents in CMP framework could change the catalytic activity of Pd NPs; hydroxy-substituted CMP encapsulated Pd NPs showed higher catalytic activity than Pd/CMP-H2 for benzyl alcohol oxidation.
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U2 - 10.1016/j.tet.2014.04.049
DO - 10.1016/j.tet.2014.04.049
M3 - Article
AN - SCOPUS:84949114993
SN - 0040-4020
VL - 70
SP - 6150
EP - 6155
JO - Tetrahedron
JF - Tetrahedron
IS - 36
ER -