粉末化学镀法制备的NiB/TiO_2非晶态合金催化剂对环丁烯砜加氢反应的催化性能

Preparation of NiB/TiO_2 Amorphous Alloy Catalyst by Powder Electroless Plating and Its Catalytic Performance for Hydrogenation of Sulfolene

采用诱导沉积法及粉末化学镀法分别制备了纯态NiB及负载型NiB/TiO2 非晶态合金催化剂 .用XRD ,ICP ,SEM ,TEM和DSC等手段对催化剂的物性及TiO2 载体与NiB非晶态合金之间的相互作用进行了表征 ,考察了非晶态合金的结构、组成、形貌和热稳定性 ,并将其用于环丁烯砜加氢反应中 .结果表明 ,相对于NiB而言 ,NiB/TiO2 催化剂具有优良的热稳定性和催化活性 ,这缘于NiB和TiO2 载体之间的相互作用及载体的分散作用 .

NiB and NiB/TiO 2 amorphous alloy catalysts were prepared by induction-che mical deposition method and power electroless plating method, respectively. The amorphous structure and properties of the alloy catalysts, and the interaction b etween NiB alloy and TiO 2 support were characterized by XRD, ICP, SEM, TEM and DSC. The catalytic activity of NiB and NiB/TiO 2 was measured during the hydro genation of sulfolene. The SEM and TEM results showed that the NiB amorphous all oy particles were mainly spherical ones with average size around 800 nm. However , the NiB particles supported on the TiO 2 support presented in half-spherical shape with average size around 90 nm. The stabilizing effect of the support on N iB amorphous alloy observed by DSC and the superior catalytic activity of NiB/Ti O 2 were attributed to the interaction between NiB alloy and TiO 2 support, esp ecially to the high dispersion of NiB alloy particles on the support.