Wang Jun, Grünbacher Matthias, Penner Simon, Bekheet Maged F, Gurlo Aleksander
Chair of Advanced Ceramic Materials, Institute of Material Science and Technology, Technische Universität Berlin, Straße des 17. Juni 135, 10623 Berlin, Germany.
Institute of Physical Chemistry, University of Innsbruck, Innrain 52c, A-6020 Innsbruck, Austria.
Polymers (Basel). 2022 Aug 25;14(17):3470. doi: 10.3390/polym14173470.
Pd-containing precursor has been synthesized from palladium acetate and poly(vinly)silazane (Durazane 1800) in an ice bath under an argon atmosphere. The results of ATR-FTIR and NMR characterizations reveal the chemical reaction between palladium acetate and vinyl groups in poly(vinyl)silazane and the hydrolyzation reaction between -Si-H and -Si-CH=CH groups in poly(vinyl)silazane. The palladium nanoparticles are in situ formed in the synthesized precursors as confirmed by XRD, XPS, and TEM. Pd- and PdSi-containing SiOCN ceramic nanocomposites are obtained by pyrolysis of the synthesized precursors at 700 °C, 900 °C-1100 °C in an argon atmosphere. The pyrolyzed nanocomposites display good catalytic activity towards the dry reforming of methane. The sample pyrolyzed at 700 °C possesses the best catalytic performance, which can be attributed to the in situ formed palladium nanoparticles and high BET surface area of about 233 m g.
含钯前驱体由醋酸钯和聚（乙烯基）硅氮烷（Durazane 1800）在氩气氛围的冰浴中合成。ATR - FTIR和NMR表征结果揭示了醋酸钯与聚（乙烯基）硅氮烷中乙烯基之间的化学反应以及聚（乙烯基）硅氮烷中 - Si - H和 - Si - CH = CH基团之间的水解反应。XRD、XPS和TEM证实合成的前驱体中原位形成了钯纳米颗粒。通过在氩气氛围中于700℃、900℃ - 1100℃对合成的前驱体进行热解，获得了含钯和含钯硅的SiOCN陶瓷纳米复合材料。热解后的纳米复合材料对甲烷干重整显示出良好的催化活性。在700℃热解的样品具有最佳催化性能，这可归因于原位形成的钯纳米颗粒和约233 m²/g的高BET比表面积。
