Ag1.8Mn8O16/MWCNTs杂化材料的制备及其电催化氧还原性能
Synthesis of Ag1.8Mn8O16/MWCNTs Hybrid Materials and Their Electrocatalytic Performance for Oxygen Reduction Reaction
贺明化 1孟文兵 1杨堡1
作者信息
- 1. 和田师范专科学校,新疆 和田 848000
- 折叠
摘要
克服动力学缓慢和解决电荷传输能力差是ORR电催化剂在实际化应用过程中必须要考虑到的两个重要问题.据此,本文使用MWCNTs作为良好的导电载体,采用一种绿色、经济和易得的合成方法成功地制备了Ag1.8Mn8O16/MWCNTs杂化材料,在碱性介质中该杂化材料展现出优异的电催化氧还原活性,起始电位和半波电位分别达到 1.00 V和0.79 V,tafel斜率低至 131.5 mV/dec,动力学电流密度高达 8.8 mA/cm2@0.75 V.活性的增强归因于Ag1.8Mn8O16 与MWCNTs之间协同作用的结果.本研究为高效锰基氧还原电催化剂的设计提供了一种新策略,也为电化学能量转换与存储装置提供了一种理想的候选材料.
Abstract
Overcoming the slow kinetics and solving the poor charge transport capacity are two critical issues that have to be taken into account in the actualisation of ORR electrocatalysts.In this study,Ag1.8Mn8O16/MWCNTs hybrid materials were successfully prepared using MWCNTs as well-conducting carriers by a green,economical and readily available synthetic method.The Ag1.8Mn8O16/MWCNTs exhibited excellent oxygen reduction electrocatalytic activity.The onset and half-wave potentials reached 1.00 V and 0.79 V,respectively.The Tafel slope exhibited a decrease to 131.5 mV·dec-1,while the kinetic current density reached a high of 8.8 mA cm-2@0.75 V.The enhanced activity was attributed to the synergistic effect between Ag1.8Mn8O16 and MWCNTs.This study provides a promising strategy for the design of efficient manganese-based oxygen reduction electrocatalysts,which provide an ideal candidate for electrochemical energy conversion and storage devices.
关键词
Ag1.8Mn8O16/MWCNTs/氧还原/电催化剂Key words
Ag1.8Mn8O16/MWCNTs/oxygen reduction reaction/electrocatalyst引用本文复制引用
出版年
2024
NETL
NSTL
万方数据