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, Yingxiang1; Li, Zhipan1; Xia, Dingguo2; Zheng, Lirong3; Liao, Yi1; Li, Kai1; Zuo, Xia1 |
| 刊名 | Journal of power sources
 |
| 出版日期 | 2015-09-30 |
| 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 |
| ISSN号 | 0378-7753 |
| DOI | 10.1016/j.jpowsour.2015.04.158 |
| 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. |
| 语种 | 英语 |
| WOS记录号 | WOS:000356746400003 |
| 出版者 | ELSEVIER SCIENCE BV |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/1639623 |
| 专题 | 高能物理研究所 |
| 通讯作者 | Zuo, Xia |
| 作者单位 | 1.Capital Normal Univ, Dept Chem, Beijing 100048, Peoples R China 2.Peking Univ, Coll Engn, Beijing 100871, Peoples R China 3.Chinese Acad Sci, Beijing Synchrotron Radiat Facil, Inst High Energy Phys, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Peng, Yingxiang,Li, Zhipan,Xia, Dingguo,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, Yingxiang.,Li, Zhipan.,Xia, Dingguo.,Zheng, Lirong.,Liao, Yi.,...&Zuo, Xia.(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, Yingxiang,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. |
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