State Key Laboratory for Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, and National Engineering Laboratory for Green Chemical Productions of Alcohols-Ethers-Esters and §Department of Chemical Engineering College of Chemistry and Chemical Engineering, Xiamen University , Xiamen 361005, China.
J Am Chem Soc. 2014 Apr 16;136(15):5583-6. doi: 10.1021/ja501530n. Epub 2014 Apr 1.
A facile method to boost the catalysis of Pd nanoparticulate catalysts by simple C2H2 treatment is developed. During the C2H2 treatment, Pd nanoparticles serve as active catalysts to polymerize C2H2 into trans-polyacetylene. The deposition of trans-polyacetylene layer on Pd nanoparticles makes their surface hydrophobic. Such a hydrophobic surface modification helps to accumulate more hydrophobic substrates during catalysis, making the modified Pd nanoparticulate catalysts more active than untreated catalysts in the catalytic reaction involving hydrophobic substrates. Moreover, the coating of polyacetylene on Pd creates encapsulated Pd nanocatalysts, stabilizing Pd nanoparticles against sintering or aggregation. Since the catalytic polymerization of polyacetylene on Pd is not facet dependent, the development is readily applied to enhance the catalysis of commercial Pd nanoparticulate catalysts by simple C2H2 treatment.
开发了一种通过简单的 C2H2 处理来提高 Pd 纳米颗粒催化剂催化活性的简便方法。在 C2H2 处理过程中，Pd 纳米颗粒作为活性催化剂将 C2H2 聚合为反式聚乙炔。反式聚乙炔层在 Pd 纳米颗粒上的沉积使它们的表面疏水。这种疏水表面改性有助于在催化过程中积累更多的疏水性底物，使得改性的 Pd 纳米颗粒催化剂在涉及疏水性底物的催化反应中比未处理的催化剂更具活性。此外，聚乙炔在 Pd 上的涂层形成了封装的 Pd 纳米催化剂，防止 Pd 纳米颗粒烧结或聚集。由于 Pd 上聚乙炔的催化聚合不依赖于晶面，因此该方法可以很容易地应用于通过简单的 C2H2 处理来提高商业 Pd 纳米颗粒催化剂的催化活性。
