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.

中文翻译：

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使用负载在活性炭上的铼贵金属双金属催化剂有效减少水中的高氯酸盐

水中的催化还原是替代当前可用技术（例如吸附或离子交换）的潜在替代方法，可有效处理高氯酸盐污染水。然而，高氯酸盐非常稳定的四面体结构阻碍了高效催化系统的开发。本工作旨在通过优化负载型催化剂的设计，获得一种在自然 pH 值和温和操作条件下降解污染水中高氯酸盐的有效催化系统。为此，测试了使用 Pt、Pd 和 Ru 与 Re 组合的不同金属组合。然后将最活跃的金属配对 (Re/Pt) 用于系统研究以优化其成分。建立了促进协调 Re/Pt 物种形成的最佳组成。这促进了高氯酸盐与溢出氢气的相互作用，从而导致反应速率高于其他地方报道的反应速率。在缺氧气氛下的再利用实验中证明了催化体系的稳定性。

概要

系统的催化剂开发研究允许合理设计催化系统，以有效地从水中去除高氯酸盐，这是一种非常稳定的水污染物。