Preparation Of New Amorphous Alloy And Its Catalytic Glucose, Maltose Hydrogenation

Amorphous alloys is a new class materials at present with short-range ordering and long-range disordering structure which may provide pathways to the excellent catalytic properties, such as higher catalytic activity and selectivity, stronger resistance to the poison, especially low and even none environmental pollution in the course of catalysts preparation. These topics are still attracting because of the industrial requirements on the atomic reactions and green chemistry. Although the study of amorphous alloy catalysts was carried out only two decades, lots of experimental data have strongly shown a good potential for their industrialapplication.In this dissertation, both the ultrafine and supported Ru-Fe-B amorphous alloys,the bimetallic amorphous alloy (Co-P-B), the bimetallic and bimetalloid amorphous alloy Ni-Co-P-B were prepared by chemical reduction. The catalytic performance of the amorphous alloy catalysts was measured during liquid phase hydrogenation of glucose or maltose to sorbitol or maltitol. The catalytic activity of the Ru-B amorphous alloy was further enhanced by adding Fe-dopant. The relationship between the structure, surface electronic state of the amorphous alloy and the catalytic performance was systematically studied based on a series of characterization of catalysts, together with the kinetic studies. Furthermore, changing the kinds of the additives and their amount in the amorphous alloys, the modification of several mixtures on the structure of the amorphous alloy has been investigated, which could account for their promoting effect on the catalytic behaviors. The researching work in the present dissertation could be summarized as follows:1. Catalysts preparation: By adding KBH4 into a solution containing (1) RuCl₃, (2) RuCl₃ and FeCl₃, (3) NiCl₂ (or CoCl₂), (4) NiCl₂ (or CoCl₂) and NaH₂PO₂, and (5) CoCl₂ and NaH₂PO₂, (6) NiCl₂, CoCl₂ and NaH₂PO₂, the ultrafine amorphous alloys of Ru-B, Ru-Fe-B, Co-B, Ni-B, Ni-P-B, Co-P-B and Ni-Co-P-B were prepared, which...