Metal hollow carbon nanocatalysts have attracted much attention in the field of catalytic hydrogenation due to their unique hollow structures. In this paper, 5%Ni15%Co@HCS with hollow structure was constructed by soft-template method, which achieved efficient hydrogenation of phenol in biphasic solvent within 1 h and has good potential for industrial application. Both alloying effects and metal-carrier interactions affected the electronic structure of Ni and Co. The formation of Ni-Co alloys was promoted by adjusting the appropriate metal ratios, which reduced the electron cloud density of Ni species and promoted metal–metal interactions. Meanwhile, the bending structure of the carbon spheres induced the metal-carrier interaction, which led to the transfer of electrons from the inner concave surface to the outer convex surface, leaving the Ni-Co NPs on the inner surface in an electron-deficient state and promoting the planar adsorption of phenol and the rapid generation of reactive H.

中文翻译：

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双金属、空心和纳米粒子催化剂在双相体系中的整体效应


金属空心碳纳米催化剂因其独特的空心结构在催化加氢领域备受关注。本文采用软模板法构建了中空结构的5%Ni15%Co@HCS，实现了1 h内苯酚在双相溶剂中的高效加氢，具有良好的工业应用潜力。合金化效应和金属-载流子相互作用都会影响Ni和Co的电子结构。通过调整适当的金属比例，降低Ni物种的电子云密度，促进金属-金属相互作用，促进Ni-Co合金的形成。同时，碳球的弯曲结构引起金属-载流子相互作用，导致电子从内凹面向外凸面转移，使内表面的Ni-Co纳米颗粒处于缺电子状态促进苯酚的平面吸附和反应性H的快速生成。