Covalent Entrapment of Cobalt-Iron Sulfides in N-Doped Mesoporous Carbon: Extraordinary Bifunctional Electrocatalysts for Oxygen Reduction and Evolution Reactions
文献类型：期刊论文
| 作者 | Shen,Mengxia; Ruan,Changping; Chen,Yan; Jiang,Chunhuan; Ai,Kelong; Lu,Lehui |
| 刊名 | acs applied materials & interfaces
 |
| 出版日期 | 2015 |
| 卷号 | 7期号:2页码:1207-1218 |
| 关键词 | HIGH-PERFORMANCE SUPERCAPACITORS SENSITIZED SOLAR-CELLS LITHIUM-ION BATTERIES WATER OXIDATION ENERGY-CONVERSION MODEL CATALYSTS THIN-FILMS FUEL-CELLS GRAPHENE NITROGEN |
| 通讯作者 | ai,kl |
| 英文摘要 | to alleviate the kinetic barriers associated with orr (oxygen reduction reaction) and oer (oxygen evolution reaction) in electrochemical systems, efficient nonprecious electrocatalysts are urgently required. here we report a facile soft-template mediated approach for fabrication of nanostructured cobaltiron double sulfides that are covalently entrapped in nitrogen-doped mesoporous graphitic carbon (co(0.5)fe(0.)5s@n-mc). notably, with a positive half-wave potential (0.808 v) and a high diffusion-limiting current density, the composite material delivers unprecedentedly striking orr electrocatalytic activity among recently reported nonprecious late transition metal chalcogenide materials in alkaline medium. various characterization techniques, including x-ray absorption spectroscopy, x-ray photoelectron spectroscopy, and x-ray diffraction, are conducted to elucidate the correlation between structural features and catalytic activities of the composite. moderate substitution and well-dispersion of iron in bimetallic sulfide composites are believed to have positive effect on the adsorption and activation of oxygen-containing species, thus leading to conspicuous orr and oer catalytic enhancement compared to their monometallic counterparts. besides, the covalent bridge between active sulfide particles and mesoporous carbon shells provides facile pathways for electron and mass transport. beneficially, the intimate coupling interaction renders prolonged electrocatalytic performances to the composite. our results may possibly lend a new impetus to the rational design of bi- or multimetallic sulfides encapsulated in porous carbon with improved performance for electrocatalysis and energy storage applications. |
| 收录类别 | SCI |
| 语种 | 英语 |
| 公开日期 | 2016-05-09 |
| 源URL | [http://ir.ciac.jl.cn/handle/322003/64739]  |
| 专题 | 长春应用化学研究所_长春应用化学研究所知识产出_期刊论文 |
| 推荐引用方式 GB/T 7714 | Shen,Mengxia,Ruan,Changping,Chen,Yan,et al. Covalent Entrapment of Cobalt-Iron Sulfides in N-Doped Mesoporous Carbon: Extraordinary Bifunctional Electrocatalysts for Oxygen Reduction and Evolution Reactions[J]. acs applied materials & interfaces,2015,7(2):1207-1218. |
| APA | Shen,Mengxia,Ruan,Changping,Chen,Yan,Jiang,Chunhuan,Ai,Kelong,&Lu,Lehui.(2015).Covalent Entrapment of Cobalt-Iron Sulfides in N-Doped Mesoporous Carbon: Extraordinary Bifunctional Electrocatalysts for Oxygen Reduction and Evolution Reactions.acs applied materials & interfaces,7(2),1207-1218. |
| MLA | Shen,Mengxia,et al."Covalent Entrapment of Cobalt-Iron Sulfides in N-Doped Mesoporous Carbon: Extraordinary Bifunctional Electrocatalysts for Oxygen Reduction and Evolution Reactions".acs applied materials & interfaces 7.2(2015):1207-1218. |
入库方式： OAI收割
来源：长春应用化学研究所
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