Enhanced electrocatalytic performance of LaCo1−xMnxO3 perovskite catalyst for glycerol oxidation.

A series of cobalt-doped LaMnO₃ (LaCo_1−xMn_xO₃, x = 0.4, 0.5, 0.6, 1.0) perovskite electrode material were synthesized by sol–gel method and applied in catalytic oxidation for glycerol. The electrochemical tests showed that LaCo_1−xMn_xO₃ (x = 0.4, 0.5, 0.6) exhibited more excellent electrochemical properties than undoped LaMnO₃. Among which, LaCo_0.4Mn_0.6O₃ showed the smallest onset potiential (~ 0.8 V), lowest Tafel slope (215.3 mV dec⁻¹), and R_ct value (39.07 kΩ), and its stability was even better than commercial Pt/C (20 wt%-SA). The improved electrochemical performance of LaCo_1−xMn_xO₃ is attributed to the uneven distribution of oxygen in LaMnO₃ structure caused by Co doping. [ABSTRACT FROM AUTHOR]