材料科学
催化作用
碳纤维
色散(光学)
纳米颗粒
氧还原
化学工程
氧化还原
主管(地质)
腐蚀
粒子(生态学)
氧气
金属
纳米技术
复合材料
冶金
有机化学
复合数
化学
电极
电化学
物理化学
工程类
地质学
物理
光学
地貌学
海洋学
作者
Zhong Ma,Shuang Li,Lijun Wu,Lihong Song,Gaopeng Jiang,Zhixiu Liang,Dong Su,Yimei Zhu,Radoslav R. Adžić,Jia X. Wang,Zhongwei Chen
出处
期刊:Nano Energy
[Elsevier]
日期:2020-03-01
卷期号:69: 104455-104455
被引量:37
标识
DOI:10.1016/j.nanoen.2020.104455
摘要
Further enhancing activity and durability of Pt-based catalysts for oxygen reduction is needed for the automotive application of fuel cells. This is however a very challenging task. Herein, we describe a new method to nail down low-oxidation-state NbOx nanoparticles at high temperature without overgrowth using the surface pores on carbon and then deposit Pt head selectively on top of NbOx derived by the redox reduction between themselves. This new structured catalyst, Pt-NbOxC, exhibited mass activities higher than 0.5 A mg−1 after 50,000 cycles between 0.6 and 1.0 V and 5,000 cycles between 1 and 1.5 V, which are 7 and 4 times of the 0.07 and 0.13 A mg−1, respectively, on Pt/C. That high sustainable ORR activity is ascribed to strong metal-support interaction that maximizes Pt utilization and minimizes particle agglomeration, carbon corrosion and metal oxidation. Furthermore, the method embedded nanoparticles into carbon pores will likely be used in developing small particles with uniform dispersion for various applications.
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