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催化剂的微观结构在催化还原反应、有机物氧化反应及有机物转化反应中起着关键作用.本文利用无模板方法合成了多金核中空二氧化铈微球催化剂.将制备好的二氧化铈中空微球浸渍到一定浓度的氯金酸溶液中,然后多次洗涤除去表面吸附的氯金酸离子,最后通过硼氢化钠还原制成中空氧化铈微球包覆的多金核的核壳结构催化剂.将该核壳结构材料用于硝基苯酚加氢反应与金纳米粒子及氧化铈微球相比,多金核中空二氧化铈核壳结构表现出优越的活性和稳定性.通过这种浸渍洗涤再还原的简单方法合成的多金核二氧化铈催化剂有望应用于生物医药和能源环境等领域.
The microstructure of the catalyst plays a key role in the catalytic reduction reaction, the oxidation reaction of organic compounds and the conversion of organic compounds.In this paper, a multi-gold core hollow ceria microspheres catalyst was synthesized by using a template-free method.The prepared hollow ceria microspheres Impregnated into a certain concentration of chloroauric acid solution, and then washed several times to remove surface adsorbed chloroauric acid ions, and finally sodium borohydride reduction made of hollow cerium oxide microspheres coated multi-nuclear core-shell structure catalyst will The core-shell structure material for the nitrophenol hydrogenation reaction compared with the gold nanoparticles and cerium oxide microspheres, gold nanoparticles hollow cerium oxide core-shell structure showed superior activity and stability by this immersion washing and then The easiest way to restore the synthesis of multi-nuclear ceria catalyst is expected to be used in biomedical and energy environment and other fields.