Synthesis of an ordered porous carbon with the dual nitrogen-doped interfaces and its ORR catalysis

来源 :中国化学快报(英文版) | 被引量 : 0次 | 上传用户:qinglong21
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
Both nitrogen-doping feature and pore structure are critical factors for developing nitrogen-doped carbons based catalysts with a high performance toward oxygen reduction reaction (ORR). Herein, a simple one-step CVD of acetylene and acetonitrile vapor method using silanized SBA-15 as a template has been developed to synthesize an ordered porous carbon (OPC) with dual nitrogen-doped interfaces. The optimized sample as prepared with the CVD of 4 h at 750 C contains two types of ordered mesopores that one type is the ordered cylindrical pores inheriting from the pores of SBA-15 and has a pore width of 4.0~5.0 nm, the other type is the ordered quasi-hexagonal pores with a width of 3.0~4.0 nm produced by etching the pore walls of SBA-15. These two types of pores whose pore walls are built by the nitrogen doped carbon layers resulted by the CVD and thus it actually makes the dual nitrogen-doped interfaced OPC (DN-OPC). Meanwhile, DN-OPC contains a few of micropores and a large SSA of 1430 m2/g. This dual-ordered pores and dual nitrogen-doped interfaces cannot only facilitate mass transport but also utilize the active sites of DN-OPC for ORR. Therefore, as metal-free ORR catalyst, DN-OPC exhibits a good activity close to commercial Pt/C catalyst, and an excellent durability and methanol tolerance.
其他文献
Fe3O4 is considered as a promising electrode material for lithium-ion batteries (LIBs) due to its low cost and high theoretical capacity (928 mAh/g). Neverthele
The underlying effect of vortex interaction characterized by the merging and non-merging on mixing enhancement is of fundamental significance to understand the
A metal-organic photoinduced electron transfer (PET) supramolecular nanoarchitecture comprised of Ru(Ⅱ) bis(terpyridine)-modified pillar[5]arene (electron acce
The strategy of adopting cheap precursors or abundant resources, which can be obtained directly from nature, is a simple and excellent method of introducing acc
Colorimetric sensing strategies as a powerful point-of-care testing (POCT) tool have attracted significant interest in various chem/biosensing applications. Tak
A pyrene-tiaraed pillar[5]arene derivative was synthesized, which showed a concentration-independent intensive excimer emission. Photolysis of the pyrene-tiarae
应用化学分析方法对镁合金转化膜溶液中锰离子的浓度进行分析,使用电化学工作站和SEM对膜层的耐蚀性、形貌和成分进行表征.结果表明:随着处理面积的增加,锰离子浓度线性减少,
In this work, a blue emitter with a 3D rigid structure composed of multiple spirobifluorene (3-Spiro) has been synthesized and characterized. Through a detailed
宁波市镇海区九龙湖中心学校坐落于宁波市镇海区西部九龙湖镇田顾村,与风景秀丽的九龙湖旅游区相邻。学校如何立足实际、关注学生需求、挖掘地域资源,打造农村中心级学校的办
期刊
A novel BF3-promoted [3+2] annulation of azonaphthalenes and ynamides is described. This protocol provides a modular and efficient entry to functionalized amino