以PdCl2为原料,加KCl促溶后在常温常压下直接通入H2反应,溶液中的Pd离子即被还原为金属Pd,体系由淡黄色变为暗棕色,同时pH值显著降低,表明有酸生成。聚乙烯吡咯烷酮(PVP)的加入会明显影响到Pd颗粒的形态。经透射电镜检测,无PVP时Pd会呈枝晶状团絮析出,加PVP后Pb晶体颗粒呈球状,且尺度均一(直径100nm左右),该胶体溶液在通常条件下性质稳定。可广泛用于污染修复或工业催化。 With PdCl2 as raw material, adding KCl to promote dissolution and then directly into H2 reaction at normal temperature and pressure, the Pd ion in the solution is reduced to metal Pd, the system changes from light yellow to dark brown, and the pH value is significantly reduced, indicating that there is Acid production. The addition of polyvinylpyrrolidone (PVP) significantly affects the morphology of Pd particles. Transmission electron microscopy revealed that Pd was dendritic flocculation without PVP, and the Pb crystal particles were spherical and uniform in size (about 100 nm in diameter) after addition of PVP. The colloidal solution was stable under normal conditions. Can be widely used in pollution repair or industrial catalysis.