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文章编号： 1672-6987（2020）01-0057-07； DOI： 10.16351/j.1672-6987.2020.01.009
林立光， 孟阿兰*
（青岛科技大学 化学与分子工程学院，山东 青岛 266042）
摘要： 采用水热法制备MoO2/MWCNTs，再通过紫外还原将银纳米颗粒沉积于其表面，成功制备了Ag/MoO2/MWCNTs复合材料。系统研究了合成条件对Ag/MoO2/MWCNTs的催化性能的影响。采用循环伏安法（CV）、线性扫描伏安法（LCV）及计时电流法（I-t）对Ag/MoO2/MWCNTs复合材料的电催化氧还原(ORR)性能及其催化氧还原稳定性进行了研究。结果表明，制备Ag/MoO2/MWCNTs的优选工艺条件为：合成MoO2/MWCNTs的反应温度为160 ℃，反应时间为6 h，MoO2(acac)2与MWCNTs的质量比为1∶1，AgNO3用量为200 μL每1 mg MoO2/MWCNTs (20 mg·mL-1)。优选条件下制备的Ag/MoO2/MWCNTs催化氧还原（ORR）为4电子催化过程，其起始电位为0.923 V，极限电流密度为6.34 mA·cm-2，半波电位为0.81 V，经过15 000 s后，催化活性仍高于90.5%。
关键词： Ag/MoO2/MWCNTs复合材料； 燃料电池； 电催化； 氧还原反应
中图分类号： O 643.36+1文献标志码： A
引用格式： 林立光， 孟阿兰. Ag/MoO2/MWCNTs纳米复合材料的制备及其催化氧还原性能\[J\]. 青岛科技大学学报（自然科学版）， 2020， 41（1）： 57-63.
LIN Liguang, MENG Alan. Preparation and catalytic performance investigation of Ag/MoO2/MWCNTs for oxygen reduction reaction\[J\]. Journal of Qingdao University of Science and Technology（Natural Science Edition), 2020， 41（1）： 57-63.
Preparation and Catalytic Performance Investigation of Ag/MoO2/MWCNTs
for Oxygen Reduction Reaction
LIN Liguang, MENG Alan
(College of Chemistry and Molecular Engineering, Qingdao University of Science and Technology, Qingdao 266042, China)
Abstract: MoO2/MWCNTs was prepared by hydrothermal method, and the Ag/MoO2/MWCNTs composite was successfully prepared by depositing silver nanoparticles on the surface by UV reduction. The synthesis conditions of Ag/MoO2/MWCNTs on the catalytic performance were systematically investigated. What is more, the oxygen reduction reaction (ORR) performance of Ag/MoO2/MWCNTs was investigated by cyclic voltammetry (CV) and linear sweep voltammetry (LSV), the stability of the product was investigated by the current-time (I-t) chronoamperometric response. The results showed that the optimal process parameters for preparing Ag/MoO2/MWCNTs were as follows: the reaction temperature of synthetic MoO2/MWCNTs was 160 ℃, the reaction time was 6 h, the mass ratio of MoO2(acac)2 to MWCNTs was 1∶1, the dosage of AgNO3 is 200 μL each 1 mg MoO2/MWCNTs (20 mg·mL-1). Ag/MoO2/MWCNTs showed ORR followed a four-electron pathway. This catalyst showed onset potential of 0.923 V, higher limiting current density of 6.34 mA·cm-2 and the half-wave potential of 0.81 V. After 15 000 s, the catalytic activity was still higher than 90.5%.
Key words: Ag/MoO2/MWCNTs composite; fuel cell; electrocatalytic; oxygen reduction reaction
收稿日期： 2019-01-24
基金项目： 国家自然科学基金资助项目（51672144）; 山东省高等学校科技计划资助项目（J16LA10）.
作者简介： 林立光（1993—），男，硕士研究生.*通信联系人.
