Catalytic oxidation of methane on KCl-MClx (MÂ =Â Li, Mg, Co, Cu, Zn) eutectic molten salts

► Synthesis of potassium chloride molten salts. ► Catalytic oxidation of methane for the first time reported over such type of catalysts. ► Highest activity and high selectivity for hydrocarbons (≥ 80%) obtained over the potassium-copper chloride catalysts.