Low-temperature electrochemical production of thorium borides in NaCl-KCl molten salt systems

Abstract

Thorium borides were synthesized via molten-salt electrochemistry in a NaCl-KCl-ThF₄-KBF₄ system at 973 K. The type of boride formed is influenced by the current density and B/Th molar ratio. Lower B/Th ratios favor ThB₄, while higher ratios promote ThB₆ formation. This method provides a green, low-temperature alternative for thorium compound synthesis, supporting sustainable TMSR fuel recycling.