Pyrolyzed iron-triethylenetetramine on carbon as catalyst for oxygen reduction reaction
Pyrolyzed iron-triethylenetetramine on carbon as catalyst for oxygen reduction reaction
复制标题
DOI：
10.1016/j.electacta.2012.10.019
复制
发表时间：
2013
影响因子：
6.6
通讯作者：
Hui-Juan Zhang;Xianxia Yuan;Zhenhao Wang;Junhe Yang;Zifeng Ma
中科院分区：
文献类型：
--
作者：
Hui-Juan Zhang;Xianxia Yuan;Zhenhao Wang;Junhe Yang;Zifeng Ma
在本研究中，以碳负载的三乙烯四胺铁为催化剂，在不同温度下，在惰性气氛中合成了一系列用于氧还原反应的铁基非贵金属非大环催化剂FeTETA/C。电化学表征表明，热处理温度对提高催化剂的ORR催化性能有重要影响，在800℃时达到最优，ORR峰电位为0.751V，电子转移数为3.85。此外，优化后的催化剂具有良好的耐甲醇性能和较好的耐酸性。利用X射线衍射仪、透射电子显微镜和X射线光电子能谱研究了热处理温度对催化剂微观结构和最佳催化剂表面元素状态的影响。
In this study, a series of Fe-based non-noble metal and non-macrocycle catalysts, FeTETA/C, for oxygen reduction reaction (ORR) have been synthesized by pyrolyzing carbon-supported iron triethylenetetramine chelate at various temperatures in an inert atmosphere. Electrochemical characterization revealed that heat treatment temperature plays an essential role on improving the catalytic property of the obtained catalysts for ORR, and the optimal could be achieved at 800°C with an ORR peak potential of 0.751V and an electron-transfer number of 3.85. Furthermore, the obtained optimal catalyst has excellent methanol-tolerance and acceptable acid-resistance. The effects of heat treatment temperature on microstructure of the catalysts as well as the elemental state on the optimal catalyst surface have been investigated using X-ray diffraction (XRD), transmission electron microscopy (TEM) and X-ray photoelectron spectroscopy (XPS).