Performance of Ag2O/Ag Electrode as Cathodic Electron Acceptor in Microbial Fuel Cell

• 来源期刊: 金属学报（英文版）
• 年，卷（期）: 2017,（12）
• 页码范围: 1243-1248
• 页数: 6页
• 语种: 英文
• DOI: 10.1007/s40195-017-0616-1

摘要

An Ag2O/Ag electrode was prepared through the electrochemical oxidation of sterling silver.This electrode was used as a cathodic electron acceptor in a microbial fuel cell (MFC).The Ag2O/Ag electrode was characterized by scanning electron microscopy,X-ray powder diffraction and linear sweep voltammetry.The maximum voltage output of the MFC with the Ag2O/Ag cathode was maintained at between 0.47 and 0.5 V in 100 cycles,indicating the good regenerative capacity of the Ag2O/Ag electrode.The overpotential loss for silver oxide was 0.021-0.006 V,and the maximum power output,open circuit potential and short circuit current of the MFC were 1.796 W m-3,0.559 V and 9.3375 A m-3,respectively.The energy required for electrochemical reoxidation ranged from 40％ to 55％ of the energy produced by the MFC.Results indicated that the Ag2O/Ag electrode could be used as a cathodic electron acceptor in MFCs with excellent stability.