Pd/MnO_(2)@C催化剂对Cr(Ⅵ)液相催化加氢还原的研究

Study on Catalytic Hydrogenation Reduction of Cr(Ⅵ)by Pd/MnO_(2)@C Catalyst

液体催化加氢技术是一种绿色经济无污染且能够有效还原去除水中污染物的技术。文章以贵金属Pd作为活性组分,以MnO_(2)作为载体,通过在Pd/MnO_(2)催化剂的表面包裹导电的碳层,形成碳包裹催化剂(Pd/MnO_(2)@C)。通过ICP、XRD、SEM和Raman等表征技术手段对催化剂的组成和形貌进行表征,并系统地研究催化剂催化加氢还原Cr(Ⅵ)的性能。为了比较包裹碳催化剂的炭化温度影响,制备了一系列不同炭化温度的Pd/MnO_(2)@C催化剂。结果表明Pd/MnO_(2)@C-600催化剂对还原Cr(Ⅵ)具有良好的稳定性。

Liquid catalytic hydrogenation is a green,economical and pollution-free technology that can effectively reduce and remove pollutants from water.In this paper,Pd as the active component and MnO_(2)as the carrier were used to wrap conductive carbon layer on the surface of Pd/MnO_(2)catalyst to form a carbon coated catalyst(Pd/MnO_(2)@C).The composition and morphology of the catalyst were characterized by ICP,XRD,SEM and Raman characterization techniques.The performance of the catalyst to reduce Cr(VI)was systematically studied.A series of Pd/MnO_(2)@C catalysts with different charring temperatures were prepared in order to compare the effect of charring temperature of the carbon encapsulated catalysts.The results of the catalyst showed that the Pd/MnO_(2)@C-600 catalyst has a good stability for reducing Cr(VI).