Catalytic hydrogenation by transition metal catalysts instead of noble metal catalysts has attracted considerable attention. Herein, the alloyed NiCo bimetallic nanoparticles encapsulated in nitrogen doped graphite-like carbon layers (Ni_xCo_1−x@NC) with controllable chemical compositions delivered high catalytic performance for hydrogenation of alkenes, alkynes, and nitroarenes. The Ni_xCo_1−x@NC catalysts exhibited a strong chemical composition-depended catalytic hydrogenation activity, in which the Ni_0.5Co_0.5@NC catalysts delivered the best performance. X-ray photoelectron spectroscopic analysis demonstrated that the highest catalytic performance of the Ni_0.5Co_0.5@NC catalysts is attributed to their optimized electronic structures for efficient hydrogen activation.

中文翻译：

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包覆在类石墨碳层中的NiCo双金属纳米颗粒，可作为高效，耐用的加氢催化剂†

通过过渡金属催化剂而不是贵金属催化剂的催化加氢已经引起了相当大的关注。在这里，合金化的NiCo双金属纳米颗粒被包裹在氮原子化的石墨状碳层（Ni _x Co _{1- x} @NC）中，具有可控的化学成分，从而为烯烃，炔烃和硝基芳烃的氢化提供了很高的催化性能。Ni _x Co _{1- x} @NC催化剂表现出很强的化学成分依赖性催化加氢活性，其中Ni _0.5 Co _0.5 @NC催化剂表现出最佳性能。X射线光电子能谱分析表明，镍具有最高的催化性能_0.5 Co _0.5 @NC催化剂归因于其为有效氢活化而优化的电子结构。