Phosphate Promoted Hydrogen Radical Production with Fe@Fe2O3 Core-Shell Nanowires for Enhanced Reactive Oxygen Species Generation

摘要

In this study,we demonstrate that the addition of phosphate could significantly promote the oxygen activation performance of Fe@Fe2O3 core-shell nanowires to generate more reactive oxygen species (ROS).The rotating ring disk electrochemical analysis revealed that the low ROS yield of Fe@Fe2O3 core-shell nanowires was ascribed to their nearly four-electron oxygen reduction to H2O in the absence of phosphate.Interestingly,the addition of phosphate could shift the nearly four-electron molecular oxygen reduction to around one-electron proton reduction to hydrogen radical,which subsequently facilitated ROS generation.This study provides a new method to improve the ROS yield of zero-valent iron induced oxygen activation process.