The development of base metal catalysts for industrially important reactions continues to be an important goal of catalysis research. Herein, the effects of pyrolysis temperature on the textural, structural, surface, magnetics properties and catalytic properties of silica-supported nickel nanoparticles (NiNPs) were thoroughly investigated. Mono-dispersed NiNPs encapsulated in graphitic shells were first successfully obtained and were characterized using a variety of methods such as BET surface area measurement, CO-pulse chemisorption, X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), high resolution transmission electron microscopy (HR-TEM), and superconducting quantum interference device (SQUID) measurement. The findings showed that all catalysts’ properties were considerably altered with change in pyrolysis temperature. Hydrogenation of diphenylacetylene was then selected as the model reaction for the evaluation of the catalytic performance of the graphitic-shelled NiNPs. After testing, pyrolysis of a nickel at 800 °C (catalyst A) displayed tremendous activity and selectivity to produce >94% of stilbene with selectivities of 99% for the Z-isomer.

用于工业上重要反应的贱金属催化剂的开发仍然是催化研究的重要目标。在本文中，彻底研究了热解温度对二氧化硅负载的镍纳米粒子（NiNPs）的组织，结构，表面，磁性和催化性能的影响。首先成功获得了包裹在石墨壳中的单分散NiNP，并使用多种方法进行了表征，例如BET表面积测量，CO脉冲化学吸附，X射线衍射（XRD），X射线光电子能谱（XPS），高分辨率的透射电子显微镜（HR-TEM）和超导量子干涉仪（SQUID）的测量。研究结果表明，随着热解温度的变化，所有催化剂的性能都发生了显着变化。然后选择二苯乙炔的氢化反应作为模型反应，以评估带壳的NiNPs的催化性能。经过测试，镍在800°C的高温下热解（催化剂A）显示出巨大的活性和选择性，可生产出94％以上的，其中Z-异构体的选择性为99％。