双金属片
催化作用
铼
无机化学
化学
金属
贵金属
吸附
材料科学
核化学
活性炭
过渡金属
钴
铑
作者
João Restivo,Olívia S. G. P. Soares,Carla A. Orge,Manuel Fernando R. Pereira
标识
DOI:10.1016/j.jece.2021.106397
摘要
Abstract Catalytic reduction in water is a potential alternative to replace current available techniques, such as adsorption or ion-exchange, for the efficient treatment of perchlorate contaminated waters. However, the development of an efficient catalytic system has been hindered by the perchlorate’s very stable tetrahedral structure. This work aims to obtain an efficient catalytic system to degrade perchlorate in contaminated water at natural pH and mild operation conditions by optimizing the design of a supported catalyst. To this end, different metal combinations, using Pt, Pd, and Ru in combination with Re were tested. The most active metallic pairing (Re/Pt) was then used in a systematic study to optimize its composition. An optimal composition that promotes the formation of coordinated Re/Pt species was established. This facilitates the interaction of perchlorate with spilled-over hydrogen, consequently resulting in improved reaction rates above those reported elsewhere. The stability of the catalytic system was demonstrated in reutilization experiments under anoxic atmosphere. Synopsis A systematic catalyst development study allows the rational design of a catalytic system to effectively remove perchlorate, a very stable water contaminant, from water.
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