CAJ | 학술논문

采用液相还原法合成出具有面心立方结构的PtNi双金属合金纳米颗粒，将其负载到SiO2载体上，然后在500℃空气氛下预处理原位合成Pt-NiO/SiO2纳米杂化体催化剂。采用XRD和TEM对样品进行了表征，结果表明，Pt-NiO/SiO2催化剂中Pt颗粒尺寸在焙烧过程中未增长，具有良好的稳定性。采用紫外吸收可见光谱仪对Pt-NiO/SiO2纳米杂化体催化剂和Pt/SiO2催化剂催化硼氢化钠还原对硝基苯酚合成对氨基苯酚的过程进行追踪测试。结果表明，Pt-NiO/SiO2纳米杂化体催化剂的催化活性和反应速率远高于Pt/SiO2催化剂的活性，这可能归因于Pt-NiO/SiO2之间的强相互作用。
채용액상환원법합성출구유면심립방결구적PtNi쌍금속합금납미과립，장기부재도SiO2재체상，연후재500℃공기분하예처리원위합성Pt-NiO/SiO2납미잡화체최화제。채용XRD화TEM대양품진행료표정，결과표명，Pt-NiO/SiO2최화제중Pt과립척촌재배소과정중미증장，구유량호적은정성。채용자외흡수가견광보의대Pt-NiO/SiO2납미잡화체최화제화Pt/SiO2최화제최화붕경화납환원대초기분분합성대안기분분적과정진행추종측시。결과표명，Pt-NiO/SiO2납미잡화체최화제적최화활성화반응속솔원고우Pt/SiO2최화제적활성，저가능귀인우Pt-NiO/SiO2지간적강상호작용。
PtNi bimetallic alloy nanopartilces with fcc crystal phase were synthesized by a liquid phase reduction method .The SiO2 supported PtNi bimetallic alloy nanopartilces was then used as precursor to obtain the Pt -NiO/SiO2 catalyst calcined at 500 ℃.Combined with XRD and TEM results ,it was found that the particle size of Pt-NiO/SiO2 using PtNi alloy nanoparticle precursor did not increase by calcination,indicating good thermal stability.The obtained catalysts were tested for catalytic reduction of p-Ni-trophenol to p-aminophenol in presence of sodium borohydride monitored by UV-visble.The results show that the catalytic activity and reaction rate of Pt-NiO/SiO2 catalyst was significantly higher than Pt/SiO2 catalyst prepared by the same conditions probably due to its strong Pt-NiO/SiO2 interaction.