Professor Jie Ma’s Team Published in Nature Communications: New advances in defect-assisted electrochemical high-efficiency dechlorination

On May 31, 2024, the research paper entitled “Reactive P and S co-doped porous hollow nanotube arrays for high performance chloride ion storage” was published in the international authoritative academic journal Nature Communications, with the corresponding author Professor Jie Ma and the first author master’s student Siyang Xing. This work was funded by the National Natural Science Foundation of China and Shanghai Science and Technology Commission.

This work performed S-doping on transition metal phosphides by chemical vapor deposition, allowing the electrode to be doped while forming cavities through the Kirkendall effect. The CoNiP@CF electrode can significantly increase the conductivity of the precursor and achieve high electron transport capacity and ion adsorption kinetics. Doping S into CoNiP@CF can form a high-valent metal center (CoNiPS@CF), which promoted the interfacial charge transfer and improved the redox activity capacity of the active substance. Furthermore, the porous hollow nanotube structure has a large number of surface active sites and high-speed ion transport channels, which is conducive to the efficient Cl- adsorption at high rate and high capacity. The hollow structure reduced the bulk expansion caused by Cl- adsorption, and thus improved the cyclic stability, achieving a high capacity of 76.1 mgCl- g-1 and a high rate of 6.33 mgCl- g-1 min-1.

This work achieves the establishment of highly reactive sites and high-speed ion diffusion channels in one step through doping, which reveals the application prospects of transition metal phosphorus sulfides in electrochemical Cl- capture, and provides universal method for designing dechlorination anode.

Article link: https://www.nature.com/articles/s41467-024-49319-5