静电纺丝
材料科学
催化作用
纳米线
合金
铂金
钴
化学工程
电解质
纳米颗粒
化学计量学
电极
氧还原反应
氧还原
纳米技术
电化学
冶金
复合材料
物理化学
有机化学
化学
工程类
聚合物
作者
Drew Higgins,Rongyue Wang,Md. Ariful Hoque,Pouyan Zamani,Salah Abureden,Zhongwei Chen
出处
期刊:Nano Energy
[Elsevier]
日期:2014-11-01
卷期号:10: 135-143
被引量:79
标识
DOI:10.1016/j.nanoen.2014.09.013
摘要
One-dimensional platinum–cobalt alloy nanowires (PtCoNWs) are prepared by electrospinning, which provides a versatile platform for the synthesis of nanowires with tunable diameters and atomic compositions. PtCoNWs with a near unity stoichiometric ratio, excellent atomic distribution and an average diameter of 28 nm were evaluated for oxygen reduction reaction (ORR) activity in 0.1 M HClO4 electrolyte. Over a four-fold enhancement in Pt mass-based activity at an electrode potential of 0.9 V vs. RHE is obtained in comparison to pure PtNWs, highlighting the beneficial impact of the alloying structure. A near 7-fold specific activity increase is also observed in comparison to commercial Pt/C catalyst, along with improved electrochemically active surface area retention through repetitive (1000) potential cycles. Electrospinning is thereby an attractive approach to prepare morphology and composition controlled PtCoNWs that could potentially one day replace conventional nanoparticle catalysts.
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