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Dechlorination degradation of 3-chlorophenol with Pd/Al bimetallic system

机译：Pd / Al双金属体系对3-氯苯酚的脱氯降解

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@@ 1. Introduction Hydrodechlorination (HDC) technology has been proved an effective degradation method for chloroorganic compounds (COC) in contaminated water. For COC degradation, HDC often employs the Pd-based bimetallic system mostly using palladized iron (Pd/Fe) particles to treat aqueous COC due to the relatively low cost, easy availability, and broad applicability of zero-valent iron (ZVI). Although Pd/Fe bimetallic particles can effectively remove COC in contaminated water, the material may not be stable for an extended run owing to ZVI corrosion. The uncontrollable corrosion would cause loss of catalyst base, iron oxide precipitation, and excessive H2 formation, which further lead to the deactivation of Pd/Fe. Recently, new attempts were made by selecting other metal substrates to replace Fe for HDC in Pd-based bimetallic systems, including Mg, Zn, or nanoscale Sn particles. In this work, Al was selected as the substrate for preparing Pd-based bimetallic material. In addition, Al is the most abundant metal element in the earth; moreover, zero-valent Al has a low standard electrode potential.
机译：@ 1.引言事实证明，加氢脱氯（HDC）技术是一种在污水中有效降解氯有机化合物（COC）的方法。对于COC降解，由于零价铁（ZVI）的成本相对较低，易于获得且具有广泛的适用性，因此HDC经常采用基于Pd的双金属系统，主要使用钯铁（Pd / Fe）颗粒处理水性COC。尽管Pd / Fe双金属颗粒可以有效去除污水中的COC，但由于ZVI腐蚀，该材料可能无法长期稳定运行。不可控制的腐蚀将导致催化剂碱的损失，氧化铁的沉淀和过量的H2形成，从而进一步导致Pd / Fe失活。最近，通过选择其他金属衬底来代替铁来替代基于Pd的双金属体系中的HDC中的铁，包括Mg，Zn或纳米级Sn颗粒，人们进行了新的尝试。在这项工作中，选择Al作为制备Pd基双金属材料的基材。另外，Al是地球上最丰富的金属元素。另外，零价Al的标准电极电位低。

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