Synthesis of Ag1.8Mn8O16/MWCNTs Hybrid Materials and Their Electrocatalytic Performance for Oxygen Reduction Reaction
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.
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