<p>Nanoscale face-centered cubic (FCC) (NbTaTiZrHf)C high-entropy carbide (HEC) powders were prepared by the molten salt CO₂ capture and electrochemical transformation method. The (NbTaTiZrHf)C HEC have a cluster-like structure, with the size of the clusters is less than 500 nm and the diameter of the small particles on the clusters is about 50 nm. The phase transformation from the metal oxides to HEC under different electrolysis durations was investigated by XRD SEM TEM, and XPS. The results show that the electrochemical reduction process of Nb₂O₅, Ta₂O₅, and TiO₂ is carried out step by step, while the electrochemical reduction process of ZrO₂ and HfO₂ is one-step electrochemical reduction processes to metals. The carbide is eventually formed by the solution reaction of the cathode carbon deposited and the electro-deoxidation metals. This approach offers a novel pathway for the environmentally sustainable synthesis of high-entropy carbides.</p>