A practical, stable and non-conventional supercritical carbon dioxide deposition precursor was used to prepare Pd/MWCNT nanoparticles. The bis(2,2’bipyridyl)palladium(II) chloride precursor has a similar solubility value to commercially used precursors while advantageously it can be reduced at moderate temperatures. Palladium nanoparticles, whose particle size distribution were estimated around 10.5 nm, was deposited on multi-walled carbon nanotube support at 80 ºC and under 20.6 MPa. The catalyst showed higher performance for the selected model Suzuki-Miyaura cross-coupling reaction when compared with a similar catalyst which was prepared under similar supercritical conditions but from a different precursor. In general temperature and pressure is the main parameters to tune material properties for this method. Hence, this study reveals how different precursors in supercritical deposition method may affect the material properties for the target applications.

中文翻译：

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通过超临界二氧化碳沉积中前驱体的变化来调节 Pd/MWCNT 纳米颗粒的催化性能


采用实用、稳定且非常规的超临界二氧化碳沉积前驱体来制备 Pd/MWCNT 纳米颗粒。双(2,2’联吡啶基)氯化钯(II)前体具有与商业使用的前体相似的溶解度值，同时有利的是它可以在中等温度下还原。钯纳米颗粒的粒径分布估计约为 10.5 nm，在 80 ℃ 和 20.6 MPa 下沉积在多壁碳纳米管支架上。与在类似超临界条件下但由不同前体制备的类似催化剂相比，该催化剂在所选模型铃木-宫浦交叉偶联反应中表现出更高的性能。一般来说，温度和压力是该方法调整材料性能的主要参数。因此，这项研究揭示了超临界沉积方法中的不同前体如何影响目标应用的材料性能。