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Identifying the Active Site in Nitrogen-Doped Graphene for the VO2+/VO2+ Redox Reaction
文献类型：期刊论文
| 作者 | Jin JT(金具涛)1,2 ; Fu XG(付小刚)1,3; Liu Q(刘乔)1,2; Liu YR(柳燕如)1; Wei ZY(魏志阳)1; Niu KX(牛可兴)1; Zhang JY(张俊彦)1
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| 刊名 | ACS Nano
 |
| 出版日期 | 2013 |
| 卷号 | 7期号:6页码:4764-4773 |
| 关键词 | graphene sheets nitrogen doping [VO](2+)/[VO2](+) couple reaction redox flow battery |
| ISSN号 | 1936-0851 |
| 通讯作者 | 张俊彦 |
| 英文摘要 | Nitrogen-doped graphene sheets (NGS), synthesized by annealing graphite oxide (GO) with urea at 700-1050 ℃, were studied as positive electrodes in a vanadium redox flow battery. The NGS, in particular annealed at 900 ℃, exhibited excellent catalytic performance in terms of electron transfer (ET) resistance (4.74 ±0.51 and 7.27 ± 0.42 Ω for the anodic process and cathodic process, respectively) and reversibility (ΔE = 100 mV, Ipa/Ipc = 1.38 at a scan rate of 50 mV s_1). Detailed research confirms that not the nitrogen doping level but the nitrogen type in the graphene sheets determines the catalytic activity. Among four types of nitrogen species doped into the graphene lattice including pyridinic-N, pyrrolic-N, quaternary nitrogen, and oxidic-N, quaternary nitrogen is verified as a catalytic active center for the [VO]2+/[VO2]+ couple reaction. A mechanism is proposed to explain the electrocatalytic performance of NGS for the [VO]2+/[VO2]+ couple reaction. The possible formation of a N-V transitional bonding state, which facilitates the ET between the outer electrode and reactant ions, is a key step for its high catalytic activity. |
| 学科主题 | 材料科学与物理化学 |
| 收录类别 | SCI |
| 资助信息 | the National Nature Science Foundation (NSFC) of China under award no. 50823008 |
| 语种 | 英语 |
| WOS记录号 | WOS:000321093800009 |
| 公开日期 | 2013-12-22 |
| 源URL | [http://210.77.64.217/handle/362003/4840]  |
| 专题 | 兰州化学物理研究所_固体润滑国家重点实验室 |
| 作者单位 | 1.Chinese Acad Sci, Lanzhou Inst Chem Phys, State Key Lab Solid Lubricat, Lanzhou 730000, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Lanzhou Univ, Coll Chem & Chem Engn, State Key Lab Appl Organ Chem, Lanzhou 730000, Peoples R China |
| 推荐引用方式 GB/T 7714 | Jin JT,Fu XG,Liu Q,et al. Identifying the Active Site in Nitrogen-Doped Graphene for the VO2+/VO2+ Redox Reaction[J]. ACS Nano,2013,7(6):4764-4773. |
| APA | Jin JT.,Fu XG.,Liu Q.,Liu YR.,Wei ZY.,...&Zhang JY.(2013).Identifying the Active Site in Nitrogen-Doped Graphene for the VO2+/VO2+ Redox Reaction.ACS Nano,7(6),4764-4773. |
| MLA | Jin JT,et al."Identifying the Active Site in Nitrogen-Doped Graphene for the VO2+/VO2+ Redox Reaction".ACS Nano 7.6(2013):4764-4773. |
入库方式： OAI收割
来源：兰州化学物理研究所
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