Journal:Materials Chemistry and Physics
Key Words:OxidesElectrochemical techniquesElectrochemical propertiesNanostructures
Abstract:A high electrocatalytic activity of RuO2 has been found for oxygen reduction reaction (ORR) in the cathode of direct borohydride fuel cells (DBFCs). The electron transfer number n during the ORR changes from 3.58 to 3.86 and the percentage of the intermediate product H2O2 decreases from 20.8% to 7.2% correspondingly when the disk potential scans negatively from −0.39 V to −0.8 V versus Hg/HgO. Peak power densities of 425 mW cm−2 has been obtained at 60 °C, when RuO2 has been used as a cathodic catalyst in DBFCs. RuO2 displays low sensitivity to the BH4− oxidation in DBFCs. Moreover, RuO2, as a cathodic catalyst, demonstrates a superb stability during a 200-h durability test. The identical X-ray diffraction (XRD) patterns of the RuO2 before and after the durability test also prove its stability.
Indexed by:Journal paper
Discipline:Engineering
First-Level Discipline:Materials Science and Engineering
Document Type:J
Volume:145
Issue:6
Page Number:269-273
Translation or Not:no
Date of Publication:2014-06-16
DOI number:10.1016/j.matchemphys.2014.01.044
First Author:Xiaodong Yang
Co-author:XiaoZhu Wei
Correspondence Author:Yongning Liu,Ce Liu
Links to published journals:https://doi.org/10.1016/j.matchemphys.2014.01.044