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为降低阴离子膜燃料电池阴极氧还原反应(oxygen reduction reaction,ORR)催化剂的成本,通过简单的超声方法制备碳担载纳米Co_3O_4(Co_3O_4/C)催化剂,通过XRD、SEM手段对其结构、形貌进行表征,并评价其催化氧还原性能.结果表明,Co_3O_4/C催化剂在碱性溶液中表现出良好的ORR催化活性:随着Co_3O_4含量增加,催化活性先增加后减小;Co_3O_4含量达50%时,催化性能达到最佳,此时,氧还原反应的极化电流密度为2.93 m A·cm-2(@-0.8 V),氧还原反应的电子转移数为2.51.与传统的Co_3O_4/C相比,本实验采用超声法制备的Co_3O_4/C催化剂合成方法简单、成本低,且有较高的氧还原活性,因此,在阴离子膜燃料电池阴极催化剂中有良好的应用前景.
In order to reduce the cost of oxygen reduction reaction (ORR) catalyst for anionic membrane fuel cell, a carbon-loaded nano-Co_3O_4 (Co_3O_4 / C) catalyst was prepared by a simple ultrasonic method. Its structure, morphology The results showed that the catalytic activity of Co_3O_4 / C catalyst increased with the increase of Co_3O_4 content and then decreased with the increase of Co_3O_4 content in alkaline solution. The content of Co_3O_4 reached 50% The current density is 2.93 m A · cm-2 (@ - 0.8 V) and the electron transfer number is 2.51 in the oxygen reduction reaction. Compared with the conventional Co_3O_4 / C In contrast, Co_3O_4 / C catalyst prepared by this method is simple, low cost and high oxygen reduction activity. Therefore, it has a good application prospect in anion membrane fuel cell cathode catalyst.