Probing the influence of the center atom coordination structure in iron phthalocyanine multi-walled carbon nanotube-based oxygen reduction reaction catalysts by X-ray absorption fine structure spectroscopy
文献类型：期刊论文
| 作者 | Peng, YX; Li, ZP; Xia, DG; Zheng, LR; Liao, Y; Li, K; Zuo, X; Zheng LR(郑黎荣)
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| 刊名 | JOURNAL OF POWER SOURCES
 |
| 出版日期 | 2015 |
| 卷号 | 291页码:20-28 |
| 关键词 | iron-phthalocyanine Multi-walled carbon nanotubes Microwave synthesis Oxygen reduction reaction Pentacoordinate X-ray absorption fine structure spectroscopy |
| 英文摘要 | Three different pentacoordinate iron phthalocyanine (FePc) electrocatalysts with an axial ligand (pyridyl group, Py) anchored to multi-walled carbon nanotubes (MWCNTs) are prepared by a microwave method as high performance composite electrocatalysts (FePc-Py/MWCNTs) for the oxygen reduction reaction (ORR). For comparison, tetracoordinate FePc electrocatalysts without an axial ligand anchored to MWCNTs (FePc/MWCNTs) are assembled in the same way. Ultraviolet-visible spectrophotometry (UV-Vis), Raman spectroscopy (RS), and high-resolution transmission electron microscopy (HRTEM) are used to characterize the obtained electrocatalysts. The electrocatalytic activity of the samples is measured by linear sweep voltammetry (LSV), and the onset potential of all of the FePc-Py/MWCNTs electrocatalysts is found to be more positive than that of their FePc/MWCNTs counterparts. X-ray photoelectron spectroscopy (XPS) and X-ray absorption fine structure (XAFS) spectroscopy are employed to elucidate the relationship between molecular structure and electrocatalytic activity. XPS indicates that higher concentrations of Fe3+ and pyridine-type nitrogen play critical roles in determining the electrocatalytic ORR activity of the samples. XAFS spectroscopy reveals that the FePc-Py/MWCNTs electrocatalysts have a coordination geometry around Fe that is closer to the square pyramidal structure, a higher concentration of Fe3+, and a smaller phthalocyanine ring radius compared with those of FePc/MWCNTs. (C) 2015 Elsevier B.V. All rights reserved. |
| 学科主题 | Electrochemistry; Energy & Fuels |
| 类目[WOS] | Electrochemistry ; Energy & Fuels |
| 收录类别 | SCI ; EI |
| WOS记录号 | WOS:000356746400003 |
| 公开日期 | 2016-05-03 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/228387]  |
| 专题 | 中国科学院高能物理研究所 |
| 推荐引用方式 GB/T 7714 | Peng, YX,Li, ZP,Xia, DG,et al. Probing the influence of the center atom coordination structure in iron phthalocyanine multi-walled carbon nanotube-based oxygen reduction reaction catalysts by X-ray absorption fine structure spectroscopy[J]. JOURNAL OF POWER SOURCES,2015,291:20-28. |
| APA | Peng, YX.,Li, ZP.,Xia, DG.,Zheng, LR.,Liao, Y.,...&郑黎荣.(2015).Probing the influence of the center atom coordination structure in iron phthalocyanine multi-walled carbon nanotube-based oxygen reduction reaction catalysts by X-ray absorption fine structure spectroscopy.JOURNAL OF POWER SOURCES,291,20-28. |
| MLA | Peng, YX,et al."Probing the influence of the center atom coordination structure in iron phthalocyanine multi-walled carbon nanotube-based oxygen reduction reaction catalysts by X-ray absorption fine structure spectroscopy".JOURNAL OF POWER SOURCES 291(2015):20-28. |
入库方式： OAI收割
来源：高能物理研究所
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