催化作用
材料科学
X射线光电子能谱
电催化剂
石墨烯
甲醇
电化学
静电纺丝
化学工程
碳纤维
碳纳米纤维
纳米纤维
无机化学
碳纳米管
纳米技术
复合数
复合材料
电极
化学
有机化学
聚合物
物理化学
工程类
作者
Bing Li,Suchithra Padmajan Sasikala,Dong‐Ha Kim,Junu Bak,Il‐Doo Kim,EunAe Cho,Sang Ouk Kim
出处
期刊:Nano Energy
[Elsevier]
日期:2019-02-01
卷期号:56: 524-530
被引量:91
标识
DOI:10.1016/j.nanoen.2018.11.054
摘要
Pt-based catalysts are suffering from the intrinsic high cost and poor stability for practical use in fuel cells. We develop a free-standing fabric type Pt-free high-performance oxygen reduction reaction (ORR) catalyst, consisting of N, Fe-codoped carbon nanofibers and graphene (N/Fe-CG) hybrids. Electrospinning is used to synthesize the free-standing fabric catalysts. Incorporation of graphene into the nanofiber structure greatly increases the electrical conductivity and catalytic surface area. X-ray photoelectron spectroscopy (XPS) analysis provides evidence that Fe-N4 active centers are possibly formed in the catalyst, as is confirmed by electrochemical tests also. Compared to commercial Pt/C, our N/Fe-CG exhibits a similar level of catalytic activity but superior stability and methanol tolerance in both alkaline and acidic media, making it a good candidate for an ORR electrocatalyst in energy storage/conversion and other relevant applications.
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