Codoping of phosphorus and nickel enhance electrocatalytic dechlorination performance of Pd-based catalyst

Chlorinated aromatic compounds are important raw materials or intermediates in many industries, but they are highly toxic and difficult to degrade in the natural environment. Electrocatalytic dechlorination technology can transform chlorinated compounds with high toxicity into substances with low toxicity and easy degradation, so it has broad application prospects. Compared with other metal catalysts, Pd-based catalysts have the highest electrocatalytic dechlorination activity. However, the high price of palladium limits the large-scale application of this technology. Hence, Ni doping strategy was used to reduce the usage of Pd in this paper, Pd-Ni and Pd-Ni-P catalysts were successfully prepared, and electrocatalytic dechlorination performance of 4-chlorophenol was studied. The results showed that the Pd-Ni-P catalyst had the highest dechlorination activity, the mass activity was 1.69 times that of pure palladium catalyst, and the use of Pd was reduced by 26.67%.