In situ formation of nitrogen-doped carbon nanoparticles on hollow carbon spheres as efficient oxygen reduction electrocatalysts | |
Zhou, Tingsheng1,2; Zhou, Yao2; Ma, Ruguang2; Zhou, Zhenzhen2; Liu, Guanghui2; Liu, Qian2,3; Zhu, Yufang1; Wang, Jiacheng2,3 | |
刊名 | NANOSCALE |
2016-11-14 | |
卷号 | 8期号:42页码:18134-18142 |
英文摘要 | In situ formation of nitrogen-doped carbon nanoparticles on hollow carbon spheres (NHCSs) were successfully realised via a simple, scalable emulsion polymerization route using melamine as the nitrogen precursor, followed by thermal treatment at 1000 degrees C in N-2. All NHCSs show large BET specific surface areas (648.2-837.7 cm(2) g(-1)) and pore volumes (0.91-1.16 cm(3) g(-1)), evidently superior to N-free hollow carbon spheres (HCSs) (524.3 cm(2) g(-1) and 0.48 cm(3) g(-1), respectively). This unique nanocomposite has hierarchical micro-/mesoporosity (1.9 nm and 16.2-19.0 nm). The X-ray photoelectron spectroscopy (XPS) measurements indicate the successful introduction of N atoms into the carbon framework and that the N-doping level can be controlled by changing the amount of melamine. The N-doping by adding melamine during the hydrothermal process not only affects the morphologies and porosities of the final samples, but also improves the electrocatalytic activity compared to N-free HCSs. NHCS-2, prepared with the molar melamine/hexamethylentetramine ratio of 1, showed the best electrocatalytic activity for the oxygen reduction reaction (ORR) in terms of onset potential, half-wave potential and limit current density. The NHCS-2 exhibited not only excellent activity with a mainly four-electron reaction pathway, but also superior long-term durability and methanol tolerance to that of commercial Pt/C in alkaline solution. The excellent electrocatalytic activity of the NHCS-2 is mainly due to its high relative content of pyridinic- and graphitic-N groups as well as unique hierarchical micro-/mesoporosity and a large specific surface area, advantageous for mass transfer and thus improving the electrocatalytic activity. |
WOS标题词 | Science & Technology ; Physical Sciences ; Technology |
类目[WOS] | Chemistry, Multidisciplinary ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied |
研究领域[WOS] | Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics |
关键词[WOS] | METAL-FREE ELECTROCATALYSTS ; CATALYST-FREE SYNTHESIS ; FUEL-CELL APPLICATIONS ; POROUS CARBON ; BIOLOGICAL-PROPERTIES ; CATHODE CATALYST ; GRAPHENE ; NANOSPHERES ; PERFORMANCE ; IRON |
收录类别 | SCI |
语种 | 英语 |
WOS记录号 | WOS:000387427400016 |
内容类型 | 期刊论文 |
源URL | [http://ir.sic.ac.cn/handle/331005/21944] |
专题 | 上海硅酸盐研究所_高性能陶瓷和超微结构国家重点实验室_期刊论文 |
作者单位 | 1.Univ Shanghai Sci & Technol, Sch Mat Sci & Engn, 516 Jungong Rd, Shanghai 200093, Peoples R China 2.Chinese Acad Sci, Shanghai Inst Ceram, State Key Lab High Performance Ceram & Superfine, 1295 Dingxi Rd, Shanghai 200050, Peoples R China 3.Shanghai Inst Mat Genome, Shanghai, Peoples R China |
推荐引用方式 GB/T 7714 | Zhou, Tingsheng,Zhou, Yao,Ma, Ruguang,et al. In situ formation of nitrogen-doped carbon nanoparticles on hollow carbon spheres as efficient oxygen reduction electrocatalysts[J]. NANOSCALE,2016,8(42):18134-18142. |
APA | Zhou, Tingsheng.,Zhou, Yao.,Ma, Ruguang.,Zhou, Zhenzhen.,Liu, Guanghui.,...&Wang, Jiacheng.(2016).In situ formation of nitrogen-doped carbon nanoparticles on hollow carbon spheres as efficient oxygen reduction electrocatalysts.NANOSCALE,8(42),18134-18142. |
MLA | Zhou, Tingsheng,et al."In situ formation of nitrogen-doped carbon nanoparticles on hollow carbon spheres as efficient oxygen reduction electrocatalysts".NANOSCALE 8.42(2016):18134-18142. |
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