简便方法制备高分散SiO_(2)负载Ni催化剂用于甲烷干重整反应  

Facile approach for synthesizing highly dispersed SiO_(2) supported Ni catalyst for dry reforming of methane

作　　者：吴娟 迟玉娟[2] WU Juan;CHI Yujuan(The Third Department of the Law Enforcement Bureall,Bureau of Comprehensive Administrative Law Enforcement for Ecological and Environmental Protection of Heilongjiang Province,Harbin 150090,China;Schoo of Chemistry and Materials Science,Heilongiang Universit,Harbin 150080,China)

机构地区：[1]黑龙江省生态环境保护综合行政执法局执法三科,哈尔滨150090 [2]黑龙江大学化学化工与材料学院,哈尔滨150080

出　　处：《黑龙江大学自然科学学报》2023年第1期41-46,共6页Journal of Natural Science of Heilongjiang University

基　　金：Supported by the National Natural Science Foundation of China (51973046)。

摘　　要：采用配体辅助浸渍法合成了SiO_(2)负载Ni催化剂(命名为Ni/SiO_(2)-bipy)。Ni/SiO_(2)-bipy催化剂在甲烷干重整(Dry reforming of methane, DRM)反应中相比于利用硝酸镍作为前驱体制备的催化剂(命名为Ni/SiO_(2)-nit)显示出较高的催化活性。TEM、H_(2)-TPR、CO化学吸附以及X射线衍射表征证实了Ni/SiO_(2)-bipy催化剂在DRM反应中性能提高的原因在于其具有较小和高分散的颗粒尺寸以及较强金属-载体相互作用。具有较高催化活性的Ni/SiO_(2)-bipy催化剂有利于催化DRM反应产生出较低比率的H_(2)/CO合成气。A highly dispersed SiO_(2)supported Ni catayst(named as Ni/SiO_(2)-bipy) was synthesized by the ligand-assisted immersion strategy. The developed Ni/SiO_(2)-bipy catalyst exhibited higher catalytic activity for dry reforming of methane(DRM) reaction in comparison with classic catalyst(named as Ni/SiO_(2)-nit) prepared with nickel nitrate precursor. The transmission electron microscopy(TEM) images as well as H_(2)-TPR, CO chemisorption and X-ray diffraction(XRD) characterization results demonstrated that the enhanced catalytic activity of Ni/SiO_(2)-bipy for DRM was ascribed to small size and highly dispersed Ni nanoparticles, which strengthened the interaction between the metallic Ni and support. The much superior catalytic activity of the developed Ni/SiO_(2)-bipy catalyst endows it to be a promising candidate for producing low ratio syngas(H_(2)/CO) via DRM.

关 键 词：镍基催化剂 甲烷干重整 配体辅助策略 金属-载体相互作用 

分 类 号：O614.813[理学—无机化学]