کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5216145 1383254 2014 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Preparation of microporous polymer-encapsulated Pd nanoparticles and their catalytic performance for hydrogenation and oxidation
ترجمه فارسی عنوان
آماده سازی نانو ذرات پودر پلی کربنات پلی کربنات و عملکرد کاتالیزوری آنها برای هیدروژناسیون و اکسیداسیون
کلمات کلیدی
نانوذرات پالادیوم، پلیمر کنژوگه کوچک کاتالیزور ناهمگن، هیدروژناسیون انتخابی
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آلی
چکیده انگلیسی

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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ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Tetrahedron - Volume 70, Issue 36, 9 September 2014, Pages 6150-6155
نویسندگان
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