The oxidation of anode carbon fuel directly affects the electrochemical performance of molten hydroxide direct carbon fuel cell (MHDCFC). In general, the anode carbon fuel can be oxidized at high temperature, thus the direct carbon fuel cell (DCFC) can show great electrochemical performance. In this study, rare earth oxides (La₂O₃, CeO₂, Pr₆O₁₁) were prepared by the method of precipitation. Activated carbon was prepared by pretreatment of lignite. Rare earth oxides and activated carbon were mixed as anode carbon fuel, and rare earth oxides were used to catalyze the electrochemical oxidation of anode carbon fuel. The results show that CeO₂ has better electrocatalytic activity compared with La₂O₃ and Pr₆O₁₁ in the MHDCFC. The electrochemical test results show that the current density (at 0.4 V) increases from 81.02 to 112.90 mA/cm² and the maximum power density increases from 34.78 to 47.05 mW/cm² at 450 °C, when the mass fraction of CeO₂ is increased from 0 to 40%. When the mass fraction of CeO₂ is 30%, the current density (82.55 mA/cm² at 0.4 V) at 400 °C is higher than that (81.02 mA/cm² at 0.4 V) without CeO₂ at 450 °C. The electrochemical oxidation mechanism of CeO₂ catalyzed anode carbon fuel is discussed.

阳极碳燃料的氧化直接影响熔融氢氧化物直接碳燃料电池（MHDCFC）的电化学性能。一般来说，阳极碳燃料可以在高温下被氧化，因此直接碳燃料电池（DCFC）可以表现出很好的电化学性能。本研究采用沉淀法制备稀土氧化物（La ₂ O ₃、CeO ₂、Pr ₆ O _{11 ）。}通过褐煤预处理制备活性炭。稀土氧化物和活性炭混合作为阳极碳燃料，稀土氧化物用于催化阳极碳燃料的电化学氧化。结果表明，CeO ₂在MHDCFC中与La ₂ O ₃和Pr ₆ O ₁₁相比具有更好的电催化活性。^{电化学测试结果}表明，当CeO ²的质量分数_为从 0 增加到 40%。当CeO ₂的质量分数为30%时，400 ℃时的电流密度（0.4 V时为82.55 mA/cm ²）高于450 ℃时没有CeO _{2时的电流密度（0.4 V时为81.02 mA/cm} ^{2 ）。}_{CeO 2}的电化学氧化机理讨论了催化阳极碳燃料。