We report a facile hydrothermal synthesis of nanorod-structured molybdenum-tungsten oxides as an efficient catalyst for olefin hydrogenation. The catalytic activity was demonstrated through hydrogenation of cyclohexene used as a model system. The as-prepared material was confirmed as a new phase (Mo_0.6W_0.4O₃) via a series of characterizations, instead of a simple mixture of MoO₃ and WO₃. The Mo_0.6W_0.4O₃ catalyst displays excellent catalytic activity with 100% conversion of cyclohexene in 3 h, which is much higher than that of pure MoO₃ and pure WO₃ synthesized with the same method. It was found that hydrogen bronze (H_xMo_0.6W_0.4O₃) was formed during the hydrogenation process, and the catalytic performance was positively correlated with the hydrogen content. The obtained nanorod-structured Mo_0.6W_0.4O₃ without loading any noble metal exhibits much higher catalytic activity than a Pd/MoO₃ catalyst. The results demonstrate that the nanorod-structured molybdenum-tungsten oxide may be a strong contender for serving as an efficient hydrogenation catalyst alternative to precious metals.

我们报告了纳米棒结构的钼-钨氧化物作为烯烃加氢的有效催化剂的简便水热合成。通过氢化用作模型系统的环己烯证明了催化活性。通过一系列表征，证实了所制备的材料为新相（Mo _0.6 W _0.4 O ₃），而不是MoO ₃和WO ₃的简单混合物。Mo _0.6 W _0.4 O ₃催化剂表现出优异的催化活性，在3小时内环己烯的转化率为100％，远高于纯MoO ₃和纯WO _3的转化率。用相同的方法合成。发现在氢化过程中形成了氢青铜（H _x Mo _0.6 W _0.4 O ₃），催化性能与氢含量呈正相关。所获得的纳米棒结构的Mo _0.6 W _0.4 O ₃没有负载任何贵金属，其催化活性比Pd / MoO ₃催化剂高得多。结果表明，纳米棒结构的钼钨氧化物可能是替代贵金属的有效氢化催化剂的有力竞争者。