文献类型：期刊文献

中文题名：电沉积制备三元Pt-Sn-Co合金纤维及氧还原电催化性能表征

英文题名：Preparation of Ternary Pt-Sn-Co Alloy Fibers by Electrodeposition and Characterization of Oxygen Reduction Electrocatalytic Performance

作者：刘帅[1];王乐萍[1];田林[2];杨妮[2];谢刚[2];李冰[1]

机构：[1]华东理工大学机械与动力工程学院,上海200237;[2]云南冶金集团共伴生有色金属资源加压湿法冶金技术国家重点实验室,昆明650503

年份：2020

卷号：10

期号：2

起止页码：1

中文期刊名：有色金属工程

外文期刊名：Nonferrous Metals Engineering

收录：CSTPCD;;北大核心:【北大核心2017】；

基金：国家自然科学基金资助项目(51774145);云南冶金集团共伴生有色金属资源加压湿法冶金技术国家重点实验室开放基金资助项目(yy2016008)~~

语种：中文

中文关键词：电沉积;PtSn23.2Co17.4;无模板;质量比活性;面积比活性

外文关键词：electrodeposition;PtSn23.2Co17.4;template-free;mass activity;area specific activity

摘要：采用CoCl2-SnCl2-1-乙基-3-甲基氯化咪唑(EMIC)离子液体,碳纸为基体,在-0.5V恒电位下无模板电沉积得到了SnCo0.73合金纤维。在K2PtCl4溶液和抗坏血酸中进行化学还原反应后,制备了PtSn23.2Co17.4纤维。电化学实验表明:经过500次循环后,PtSn23.2Co17.4纤维的电化学活性面积(ECSA)相对于商用催化剂(JM-Pt/C)下降得更慢。在0.85V时,PtSn23.2Co17.4纤维的质量比活性和面积比活性分别为23.35mA/mg和0.048mA/cm^2,分别是JM-Pt/C催化剂的1.3倍和1.5倍。在0.9V时,PtSn23.2Co17.4纤维的质量比活性和面积比活性分别为12.67mA/mg和0.026mA/cm^2,分别是JM-Pt/C催化剂的2.6倍和3.3倍。经过500次循环后,在0.85V和0.9V,PtSn23.2Co17.4纤维的质量比活性和面积比活性均明显高于JM-Pt/C催化剂。此外,负载PtSn23.2Co17.4纤维的碳纸可以作为电极直接组装进燃料电池,简化了燃料电池的制备过程。
Using CoCl2-SnCl2-1-ethyl-3-methylimidazole chloride(EMIC)ionic liquid with carbon paper as matrix,SnCo 0.73 alloy fibers were obtained by template-free electrodeposition at-0.5 Vconstant potential.PtSn23.2Co17.4 were prepared after chemical reduction in K2 PtCl4 solution and ascorbic acid.Electrochemical tests show that the electrochemical activity area(ECSA)of PtSn23.2Co17.4 fibers decreases more slowly than the commercial catalyst(JM-Pt/C)after 500 cycles.At 0.85 V,the mass specific activity and area specific activity of PtSn23.2Co17.4 fibers are 23.35 mA·mg^-1 and 0.048 mA·cm^-2,respectively,which are 1.3 times and 1.5 times of the JM-Pt/C catalyst,respectively.At 0.9 V,the mass specific activity and area specific activity of PtSn23.2Co17.4 fibers are12.67 mA·mg^-1 and 0.026 mA·cm^-2,respectively,which are 2.6 times and 3.3 times as much as those of the JM-Pt/C catalyst,respectively.After 500 cycles,the mass activity and area specific activity of PtSn23.2Co17.4 fibers are significantly higher than those of the JM-Pt/C catalyst at 0.85 Vand 0.9 V.In addition,carbon paper loaded with PtSn23.2Co17.4 fibers can be directly assembled into the fuel cell as an electrode,which simplifies the preparation process of the fuel cell.