报道了 一种用 于乙腈加 氢的 新 型 复合 型 催化 剂 超细 Ｃｏ Ｂ 非 晶 态合 金（ 粒 径 ６０ ｎ ｍ左右） ， 其催 化性能显 著优于 其它 Ｃｏ 基催 化剂． 以此代替 工业用 Ｒａｎｅｙ Ｎｉ ， 不 仅可 提高 对乙 胺的选择性 ，而且可 显著减轻 环境污 染． 通 过一系列 表征，讨 论了乙腈 在催化 剂活性位 的吸附 模式及催化加氢 反应机 理，由此对 其催化 性能与催 化剂结 构的关系 进行了说 明． A new type of composite catalyst for the hydrogenation of acetonitrile has been reported for the ultrafine CoB amorphous alloy (about 60 nm in particle size). Its catalytic performance is significantly better than that of other Co-based catalysts. As a substitute for industrial Raney Ni, not only can increase the selectivity of ethylamine, but also significantly reduce environmental pollution. Through a series of characterizations, the adsorption mode of acetonitrile on catalytic active sites and the mechanism of catalytic hydrogenation were discussed. The relationship between the catalytic properties and catalyst structure was described.