A novel electrolyte composed of carbonate and CsVO3-MoO3 for electrochemical oxidation of graphite

作者：Liu, Jia; Ye, Ke; Zeng, Jia; Wang, Guiling; Yin, Jinling^*; Cao, Dianxue

来源：Electrochemistry Communications, 2014, 38: 12-14.

DOI：10.1016/j.elecom.2013.10.031

• Carbon electrooxidation
• Molten carbonate
• Direct carbon fuel cell
• Cesium vanadium trioxide
• Molybdenum trioxide

The catalytic activity of a homogeneous molten salt consisting of (Li,Na,K)(2)CO3 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 125 mA cm(-2) at -0.4 V and 750 degrees C, which is much higher than that obtained in the conventional molten carbonate electrolyte (47 mA cm(-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 degrees C is negatively shifted by -0.3 V and the current density at -0.4 V is increased by 6.7 times by introducing CsVO3-MoO3 into the molten (Li,Na,K)(2)CO3. The catalytic mechanism of CsVO3-MoO3 is briefly discussed.

• 出版日期2014-1
• 单位哈尔滨工程大学