Highly effective catalytic reaction process using nanoparticles in supercritical carbon dioxide

研究了不同包覆剂制备的钯纳米粒子在超临界二氧化碳中的分散性和催化活性。Pd纳米粒子在不同溶剂中的分散性随包覆剂种类和浓度的不同而变化。Pd纳米粒子在Mizoroki-Heck反应中的催化活性也与包覆剂条件有关，且存在一个最佳包覆剂条件。负载在新型底物上的Pd纳米粒子表现出高效的催化性能，并使催化剂能够从反应介质中成功回收。

Dispersibility and catalytic activity of palladium(Pd) nanoparticles prepared with various coating agents were investigated in supercritical carbon dioxide. The dispersibility of the Pd nanoparticles in various solvents was controlled with the species and concentration of coating agent. The catalytic activity of the Pd nanoparticles in the Mizoroki-Heck reaction also depended upon the coating agent conditions, and there was an optimal coating agent condition to exhibit a maximum. Pd nanoparticles supported on novel substrates exhibited highly effective catalytic performance and enabled the successful recovery of the catalysts form the reaction medium.