Pd-based materials have been considered to be the preferred electrocatalysts for electrocatalytic hydrodechlorination (EHDC) due to their excellent H* production capacity. However, the scarcity and high price of Pd restrict its use, thus, an efficient Pd-based EHDC electrocatalyst with low Pd content should be developed. In this work, oxygen vacancies-rich CoO (CoO) cone-like architecture growth in situ on Ni foam was used as an intermediate layer to synthesize Pd@CoO/NF EHDC electrocatalyst with low Pd loading (0.0254 mg cm). Pd@CoO/NF electrocatalyst can obviously promote the H* production and shows high EHDC activity with a dechlorination activity (DA) of 2.07 mmol g min for EHDC of 2,4-dichlorophenol, which is higher than most reported Pd-modified electrodes. The Pd@CoO/NF exhibited excellent anti-background interference ability (different initial pH and anions in aqueous solution) and good cycle stability (5 consecutive EHDC cycles), which could effectively improve aquatic biosafety.

中文翻译：

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富含氧空位的 Co3O4 锥体负载低含量 Pd，用于高效快速的电催化加氢脱氯

钯基材料因其优异的H*生产能力而被认为是电催化加氢脱氯（EHDC）的首选电催化剂。然而，Pd的稀缺性和高价格限制了其使用，因此，需要开发一种低Pd含量的高效Pd基EHDC电催化剂。在这项工作中，采用在泡沫镍上原位生长的富含氧空位的CoO（CoO）锥状结构作为中间层，合成了低Pd负载量（0.0254 mg cm）的Pd@CoO/NF EHDC电催化剂。 Pd@CoO/NF电催化剂可以明显促进H*的产生，并表现出较高的EHDC活性，对2,4-二氯苯酚的EHDC脱氯活性（DA）为2.07 mmol g·min，高于大多数报道的Pd修饰电极。 Pd@CoO/NF表现出优异的抗背景干扰能力（水溶液中不同的初始pH和阴离子）和良好的循环稳定性（连续5次EHDC循环），可以有效提高水生生物安全性。