文献类型：期刊文献

中文题名：用于质子交换膜燃料电池的高活性、高稳定性PdCo/C合金催化剂

英文题名：Remarkably Active and Durable PdCo/C Alloy Catalysts for Proton Exchange Membrane Fuel Cells

作者：朱新星[1];贺阳[1];吴焱林[1];王健农[1]

机构：[1]华东理工大学机械与动力工程学院

年份：2020

卷号：38

期号：1

起止页码：109

中文期刊名：材料科学与工程学报

外文期刊名：Journal of Materials Science and Engineering

收录：CSTPCD;;北大核心:【北大核心2017】；CSCD:【CSCD2019_2020】；

基金：国家自然科学基金资助项目(51271077,U1362104)

语种：中文

中文关键词：质子交换膜燃料电池;催化剂;热处理;氧还原反应;合金

外文关键词：proton exchange membrane fuel cell;catalyst;heat treatment;oxygen reduction reaction;alloy

摘要：利用乙酸钴和双氰胺在不同温度下制备了碳包覆钴样品,并将其作为载体,利用液相还原法和真空热处理制备了PdCo/C合金催化剂。采用多种测试技术对样品进行了结构、形貌及组分的表征,研究了不同载体和不同热处理温度的样品的催化性能。实验结果表明,平均粒径为1.9nm的钯纳米颗粒能够均匀负载到含氮的石墨化程度较低的碳包覆钴载体上。热处理带来的合金化作用能够极大地提高催化剂的氧还原活性和稳定性,经过900℃热处理的样品其氧还原活性和稳定性都优于传统商业Pt/C催化剂。
Carbon-coated cobalt samples were prepared at different temperatures using cobalt acetate and dicyandiamide.PdCo/C alloy catalysts were synthesized on the carbon-coated cobalt substrate by a liquid reduction and heat treatment method.All samples were characterized by several methods to study the morphologies and crystallization properties of the catalysts.Electrochemical measurements were used to test the catalytic performance of the samples with different supports and different heat treatment temperatures.Results show that Pd nanoparticles with an average particle diameter of 1.9 nm can be uniformly deposited on the nitrogen-containing carbon-coated cobalt support with a lower degree of graphitization.It is proved that great improvement of the activity and stability of the catalysts toward oxygen reduction reaction(ORR)can be achieved by the alloying effect,and the catalyst annealed at 900℃has better ORR activity and stability than the conventional commercial Pt/C catalyst.