中文摘要：

采用化学还原法合成Pd纳米立方体,并将其作为晶种,进一步合成大尺寸的纳米Pd立方体以及具有不同{100}和{111}晶面比例的纳米Pd多面体.将形貌和尺寸可控的纳米Pd溶胶应用于1,4-丁炔二醇催化加氢的反应中,反应结果表明,纳米Pd的催化性能取决于其尺寸和形貌.{111}晶面的催化活性高于{100}晶面,PVP稳定的Pd胶体对1,4-丁烯二醇均具有较高选择性,具有适当{100}和{111}晶面比例的纳米Pd多面体对1,4-丁烯二醇的选择性可达96%.

英文摘要：

Uniform Pd nanocrystals with cubic shapes were synthesized through a chemical reduction method. These nanoparticles were used as seeds to synthesis nanocubes with larger size and polyhedral nanocrystals with dif- ferent proportions of t 100t to / 111 / facets on the surface. The selective hydrogenation of 1,4-butynediol was cho- sen as a model reaction, it was found that the catalytic properties of Pd nanoparticles are mainly determined by its size and shape. The hydrogenation of 1,4-butynediol on Pd t 111 t was faster than that on Pd { 100 t } All of the Pd nanocrystals stabilized by PVP showed higher selectivity to 1,4-butynediol, and the selectivity of 1,4-butynediol using Pd polyhedron with proper proportion of t 100 t and { 111 t facets as catalyst can received 96%.