Fe/n/c electrocatalysts for oxygen reduction reaction in pem fuel cells using nitrogen-rich ligand as precursor
文献类型：期刊论文
| 作者 | Yang, Lingling1,2; Su, Yumiao2,3; Li, Wenmu2,3; Kan, Xianwen1 |
| 刊名 | Journal of physical chemistry c
 |
| 出版日期 | 2015-05-28 |
| 卷号 | 119期号:21页码:11311-11319 |
| ISSN号 | 1932-7447 |
| DOI | 10.1021/jp511576q |
| 通讯作者 | Li, wenmu(liwm@fjirsm.ac.cn) |
| 英文摘要 | High temperature pyrolysis can significantly improve the activity and stability of fe-based catalysts. however, unwanted iron nanoparticles, which are proven inactive to oxygen reduction reaction (orr), will form under this procedure. herein, a nitrogen-rich and hindrance multifunctional 6,7-di(pyridin-2-yl)pteridine-2,4-diamine (dppd) monomer was deliberately designed and synthesized. high content of thermally stable nitrogen in dppd can increase the degree of coordination with iron and provide a high content of active nitrogen after pyrolysis. distorted nitrogen-rich ferrous complex polymers were successfully prepared to keep iron ions well separated and prevent them from aggregating during the heat treatment. carbon-supported fe-based catalysts with different initial iron loadings from 0.2 to 4.0 wt % were obtained. transmission electron microscopy (tem) revealed that there were no obvious nanocrystals observed, even the initial iron loading was up to 2.0 wt %. the electrochemical performance of the fe-based catalysts was evaluated via cyclic voltammetry (cv) and linear sweep voltammetry (lsv). the result shows that an fe-based catalyst with 2.0 wt % initial iron loading is the best orr catalyst in acid media among all the iron loadings. typically, in basic media, the catalyst with 2.0 wt % initial iron loading exhibits comparable electrocatalytic activity to commercial pt/c material via an efficient four-electron-dominant orr pathway coupled with better methanol tolerance as well as durability. xps measurements confirmed that the outstanding activity of the catalyst with 2.0 wt % initial iron loading was likely attributed to higher content of pyridinic nitrogen, providing the highest density of active site structures. |
| WOS关键词 | METAL-FREE ELECTROCATALYSTS ; FE-BASED CATALYSTS ; O-2 ELECTROREDUCTION ; IRON PHTHALOCYANINE ; ASSISTED SYNTHESIS ; CARBON SUPPORTS ; ACTIVE-SITES ; AREA CARBON ; PERFORMANCE ; CATHODE |
| WOS研究方向 | Chemistry ; Science & Technology - Other Topics ; Materials Science |
| WOS类目 | Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary |
| 语种 | 英语 |
| WOS记录号 | WOS:000355495600005 |
| 出版者 | AMER CHEMICAL SOC |
| URI标识 | http://www.irgrid.ac.cn/handle/1471x/2376646 |
| 专题 | 中国科学院大学 |
| 通讯作者 | Li, Wenmu |
| 作者单位 | 1.Anhui Normal Univ, Coll Chem & Mat Sci, Anhui Key Lab Chemo Biosensing, Wuhu 241000, Peoples R China 2.Chinese Acad Sci, Fujian Inst Res Struct Matter, Key Lab Res Chem & Phys Optoelect Mat, Fuzhou 350002, Peoples R China 3.Univ Chinese Acad Sci, Beijing, Peoples R China |
| 推荐引用方式 GB/T 7714 | Yang, Lingling,Su, Yumiao,Li, Wenmu,et al. Fe/n/c electrocatalysts for oxygen reduction reaction in pem fuel cells using nitrogen-rich ligand as precursor[J]. Journal of physical chemistry c,2015,119(21):11311-11319. |
| APA | Yang, Lingling,Su, Yumiao,Li, Wenmu,&Kan, Xianwen.(2015).Fe/n/c electrocatalysts for oxygen reduction reaction in pem fuel cells using nitrogen-rich ligand as precursor.Journal of physical chemistry c,119(21),11311-11319. |
| MLA | Yang, Lingling,et al."Fe/n/c electrocatalysts for oxygen reduction reaction in pem fuel cells using nitrogen-rich ligand as precursor".Journal of physical chemistry c 119.21(2015):11311-11319. |
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来源：中国科学院大学
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