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Abstract: The catalytic activity of a homogeneous molten salt consisting of (Li,Na,K)2CO3 with dissolved additions of CsVO3–MoO3 for graphite electrooxidation is investigated. This electrolyte forms a eutectic mixture with low melting point, high stability in the presence of CO2, and catalytic activity for graphite electrooxidation. The current density of graphite electrooxidation in this novel electrolyte reaches 125mAcm−2 at −0.4V and 750°C, which is much higher than that obtained in the conventional molten carbonate electrolyte (47mAcm−2). More importantly, the addition of CsVO3–MoO3 significantly improves the electrooxidation activity of graphite at low temperature. The onset potential for graphite electrooxidation at 550°C is negatively shifted by −0.3V and the current density at −0.4V is increased by 6.7 times by introducing CsVO3–MoO3 into the molten (Li,Na,K)2CO3. The catalytic mechanism of CsVO3–MoO3 is briefly discussed. [Copyright &y& Elsevier]