高等学校化学学报 ›› 2015, Vol. 36 ›› Issue (10): 1961.doi: 10.7503/cjcu20150303

• 物理化学 • 上一篇    下一篇

高载量PtNi金属间化合物的氧还原电催化性能

黄庆红1,2, 邹亮亮2, 周毅2, 邹志青2, 张校刚1(), 杨辉2()   

  1. 1. 南京航空航天大学材料科学与技术学院, 南京 210016
    2. 中国科学院上海高等研究院, 上海 201210
  • 收稿日期:2015-04-16 出版日期:2015-10-10 发布日期:2015-09-18
  • 作者简介:联系人简介: 杨 辉, 男, 博士, 研究员, 博士生导师, 主要从事燃料电池及相关材料研究. E-mail:yangh@sari.ac.cn;张校刚, 男, 博士, 教授, 博士生导师, 主要从事电化学研究. E-mail:azhangxg@163.com
  • 基金资助:
    国家“九七三”计划项目(批准号: 2012CB932800)和国家自然科学基金(批准号: 21073219)资助

Electrocatalytic Performance of Highly Loaded PtNi Intermetallic Nanoparticles for Oxygen Reduction

HUANG Qinghong1,2, ZOU Liangliang2, ZHOU Yi2, ZOU Zhiqing2, ZHANG Xiaogang1,*(), YANG Hui2,*()   

  1. 1.College of Material Science and Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
    2. Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai 201210, China
  • Received:2015-04-16 Online:2015-10-10 Published:2015-09-18
  • Contact: ZHANG Xiaogang,YANG Hui E-mail:azhangxg@163.com;yangh@sari.ac.cn
  • Supported by:
    † Supported by the National Key Basic Research Program of China(No.2012CB932800) and the National Natural Science Foundation of China(No.21073219)

摘要:

采用改进的多元醇法制备了PtNi(原子比1∶1)质量分数为60%的高金属载量碳载PtNi合金(PtNi/C), 通过在450 ℃下退火处理获得了碳载PtNi金属间化合物氧还原电催化剂. 该催化剂对氧还原的质量比活性和面积比活性分别是商业化Pt/C(JM Pt/C)催化剂的1.66和2.3倍; 并且加速耐久性测试后PtNi金属间化合物催化剂的质量比活性仍与Pt/C的初始性能相当, 耐久性得到了大幅提升. PtNi/C金属间化合物催化剂氧还原活性和稳定性的提高归因于PtNi的有序原子排布结构及催化剂表面零价金属含量的提高.

关键词: 氧还原, PtNi金属间化合物, 电催化剂, 高稳定性

Abstract:

PtNi/C disordered alloy nanoparticles, synthesized in ethylene glycol solution, were annealed and converted into ordered PtNi/C intermetallic nanoparticles. Such an ordered intermetallic PtNi/C catalyst showed enhanced specific activity and mass activity, which were about 2.3 and 1.66 times those of Pt/C for the oxygen reduction reaction(ORR), in comparison with the Pt/C catalyst. After accelerated stress tests(ASTs), the ORR mass activity of the Pt/C and PtNi/C intermetallic nanoparticles decreased to 88.92% and 36.95% of the initial values, respectively; and the mass activity of PtNi/C intermetallic nanoparticles after ASTs was equivalent to the initial one of the Pt/C catalyst. The enhanced ORR activity and durability of the PtNi/C intermetallic nanoparticles could be attributed to the ordered atomic configuration and the increased content of zero valence metal on the surface of nanoparticles. Moreover, the ordered PtNi/C intermetallic nanoparticles exhibited higher methanol tolerance during the ORR than the Pt/C catalyst.

Key words: Oxygen reduction, PtNi intermetallic nanoparticles, Electrocatalyst, High durability

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