| 侯雨薇,陈璐,李永祥,俞小花,沈庆峰.化学通报,2023,86(8):1012-1017. |
| 碳微球模板制备LaMnO3及其电化学性能研究 |
| Study on catalytic performance of LaMnO3 prepared by silica template method for oxygen reduction |
| 投稿时间：2022-12-06 修订日期：2023-02-23 |
| DOI： |
| 中文关键词: 碳微球模板 LaMnO3 电化学性能 催化剂 |
| 英文关键词:Carbon microsphere template LaMnO3 electrochemical performance catalyst |
| 基金项目:国家自然科学基金项目(51774160)和云南省万人计划项目(YNWR-QNBJ-2018-327)资助 |
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| 中文摘要: |
| 以葡萄糖为碳源采用水热法制备出碳微球，再将其作为模板剂，柠檬酸作为络合剂，去离子水和乙醇作为溶剂，经过混合搅拌、沉淀和去除模板剂等过程来制备LaMnO3。采用粉末 X 射线衍射(XRD)、场发射扫描电子显微镜(SEM）、N2 吸附-脱附等对制备LaMnO3进行表征分析，并对其电化学性能进行了测试。结果表明：碳微球模板可制备出层状多孔结构的LaMnO3，其具有良好的氧还原反应(ORR)和析氧反应（OER）催化活性，比表面积为26 m2/g，将其制备成铝-空气电池空气电极催化剂，在电流密度为20 mA·cm-2时放电电压可达1.476 V，相比于共沉淀法制备的LaMnO3的放电电压高。 |
| 英文摘要: |
| Using glucose as carbon source, carbon microspheres were prepared by hydrothermal method, and then used as templates, citric acid as complexing agent, deionized water and ethanol as solvents to prepare LaMnO3 through mixing, stirring, precipitation and removal of templates. The prepared LaMnO3 was characterized by powder X-ray diffraction (XRD), field emission scanning electron microscopy (SEM) and N2 adsorption desorption, and its electrochemical properties were tested. The results showed that LaMnO3 with layered porous structure could be prepared by carbon microsphere template, which had good catalytic activity for oxygen reduction reaction (ORR) and oxygen evolution reaction (OER), and its specific surface area was 26 m2/g. When the carbon microsphere template was prepared as the air electrode catalyst for aluminum air battery, the discharge voltage could reach 1.476 V at the current density of 20 mA · cm-2, which was higher than that of LaMnO3 prepared by coprecipitation method. |
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