environmentally benign hydrogenations. Here, we have developed a straightforward reductive amination methodology using molecular hydrogen in the presence of a Co3O4/NGr@C catalyst system. Various carbonyl compounds were transformed with secondary amines to the corresponding tertiary amines with good to excellent yields and selectivity. The Co3O4/NGr@C catalyst is recycled up to five times without significant
异质非贵金属基催化剂可实现经济高效且对环境无害的氢化反应。在这里,我们已经开发出了一种简单的还原胺化方法,该方法是在Co 3 O 4 / NGr @ C催化剂体系存在下使用分子氢。用仲胺将各种羰基化合物以良好或优异的收率和选择性转化为相应的叔胺。Co 3 O 4 / NGr @ C催化剂可循环使用五次,而不会明显降低活性。
Synthesis of Nickel Nanoparticles with N-Doped Graphene Shells for Catalytic Reduction Reactions
The synthesis of novel nanoparticles is of general importance for the development of efficient heterogeneous catalysts. Herein, the preparation of carbon‐supported nickel‐based nanoparticles (NPs), modified by nitrogen‐doped graphene layers, is reported for the first time. The resulting materials were characterized in detail by TEM, X‐ray photoelectron spectroscopy (XPS), XRD, elemental analysis (EA)