钯
电化学
吸附
氢解
金属
无机化学
化学
电极
阴极
脱氯作用
水溶液中的金属离子
色散(光学)
催化作用
有机化学
生物降解
物理化学
物理
光学
作者
Yi Shen,Yiwen Tong,Jinli Xu,Shaobin Wang,Jun Wang,Tao Zeng,Zhiqiao He,Wanquan Yang,Shuang Song
标识
DOI:10.1016/j.apcatb.2019.118505
摘要
Electrocatalytic hydrogenolysis (ECH) appears to be an effective method for remediation of toxic contaminants in natural water. In this work, metallic palladium was loaded on Ni-based layered metal-organic frameworks (NiMOF) using adsorption followed by an electroreduction method. Benefiting from high dispersion of palladium and enhanced adsorption of NiMOF towards 2,4-dichlorophenoxyacetic acid (2,4-D), the as-obtained electrode (Pd-NiMOF/Ni) offers large amounts of active hydrogen and high surface concentration of 2,4-D in the ECH process. Consequently, Pd-NiMOF/Ni displays enhanced activity and selectivity compared to traditional electrodes. In addition, the Pd-NiMOF/Ni cathode was extremely stable, as verified by six successive cycling tests. Co-existing ions, including NO3−, HCO3−, CO32− and Ca2+ exert a negative impact on the electrocatalytic dechlorination, whereas no effect of Cl− on the process. Nonetheless, the electrochemical dechlorination of 2,4-D in Evian water remained effective, demonstrating the potential application of this electrode in efficient dechlorination of chlorinated aromatic compounds.
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