多孔碳纤维负载Pt-Ni双金属催化剂对甲醇的电催化氧化
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- 英文论文题名：Electrooxidation of Methanol on Pt @Ni Bimetallic Catalyst Supported on Porous Carbon Nanofibers
- 论文作者：陈建溢 ; 聂俊 ; 马贵平
- 英文论文作者：JianYi Chen ; Jun Nie ; GuiPing Ma ; Beijing University of Chemical Technology
- 年：2016
- 作者机构：北京化工大学;
- 论文关键词：铂镍催化剂 ; 碳纳米纤维 ; 电纺丝 ; 甲醇燃料电池
- 会议召开时间：2016-11-18
- 会议录名称：中国第四届静电纺丝大会（CICE 2016）摘要集
- 语种：中文
- 分类号：TQ342.742;O643.36
- 学会代码：ZGNM
- 会议名称：中国第四届静电纺丝大会(CICE 2016)
- 会议地点：中国北京
- 主办单位：中国复合材料学会超细纤维材料分会（筹）
- 学会名称：中关村科创纳米技术创新研究会
- 页数：1
- 文件大小：660k
- 原文格式：D
- 会议级别：全国
摘要
通过静电纺丝、碳化和化学还原等方法我们制备出了Ni/Pt/CNFs(图1a)。通过XRD、Raman、XPS等手段进行了结构及性能的表征,形态特征的表征采用了SEM、TEM和BET等技术,电化学性能的测试采用了循环伏安法和计时电流法。结果表明,在实验过程中,铂和镍的纳米颗粒都被完全的还原且均匀的分布在纤维上,铂和镍纳米粒子的平均直径大小分别为3.8 nm和17.8 nm。此外,Ni50/Pt/CNFs展现出对甲醇具有很好的电催化性能,并且随着时间的推移电流也表现出了较慢的衰退(图1b),这表明其具有较好的抗CO中毒能力。并且甲醇氧化电位的负移也证明了Ni50/Pt/CNFs具有更高的活性。
We preparedthe Ni/Pt/CNFs successfully via electrospinning process, carbonization process and chemical reduction method. The structure and compositionof Ni/Pt/CNFswere characterized with XRD,Ramanspectroscopy and XPS. The morphology was characterized with SEM, TEM and Nitrogen adsorptionisotherms. The electrochemical performance was evaluated by cyclic voltammetry andchronopotentiometry. The results indicated that Pt and Ni nanoparticles were completely reduced in the experimental process and evenly distributed on the fibers and the average diameters of Pt and Ni are 3.8 nm and 17.8 nm. In addition, the Ni_(50)/Pt/CNFs catalyst showed superior specific and mass activities for methanol oxidationand exhibited a slightly slower current decay over time. Besides, negative shift in the methanol oxidation potential relied on the loadingamount of Ni, which also prove the higher activity of Ni_(50)/Pt/CNFs for methanol oxidation.
We preparedthe Ni/Pt/CNFs successfully via electrospinning process, carbonization process and chemical reduction method. The structure and compositionof Ni/Pt/CNFswere characterized with XRD,Ramanspectroscopy and XPS. The morphology was characterized with SEM, TEM and Nitrogen adsorptionisotherms. The electrochemical performance was evaluated by cyclic voltammetry andchronopotentiometry. The results indicated that Pt and Ni nanoparticles were completely reduced in the experimental process and evenly distributed on the fibers and the average diameters of Pt and Ni are 3.8 nm and 17.8 nm. In addition, the Ni_(50)/Pt/CNFs catalyst showed superior specific and mass activities for methanol oxidationand exhibited a slightly slower current decay over time. Besides, negative shift in the methanol oxidation potential relied on the loadingamount of Ni, which also prove the higher activity of Ni_(50)/Pt/CNFs for methanol oxidation.
引文
[1]Barakat N A M,Motlak M,Kim B S,et al.J.Mol.Catal.A-Chem,2014,394(394):177-187.