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学科主题物理化学
Graphene and N-doped graphene for electrocatalysis
Deng DH(邓德会); Pan XL(潘秀莲); Yu L(于良); Cui Y(崔义); Zhang H(张辉); Li WX(李微雪); Fu Q(傅强); Bao XH(包信和)
会议文集Precedings of Carbocat IV
会议名称4th International Symposium on Carbon for Catalysis
会议日期2010-11-7
2011
会议地点大连
页码74-0
出版者待补充
出版地待补充
合作性质墙报
部门归属502
主办者大连化物所
英文摘要Unique structural and electronic properties of graphene have evoked huge interest in its potential applications in a wide range of fields, e.g. nanoelectronic devices, sensors and catalysis. However, realization of these applications will rely on the availability of high quality graphene on a large scale. We developed here a non-liquid phase method for production of free-standing graphene nanosheets via one step thermal splitting of commercial polycrystalline silicon carbide granules. These graphene sheets contain few defects and exhibit a good stability against oxidation. This novel synthetic approach is expected to enable mass production of high quality graphene, which could promote further development of graphene-based technologies, in particular fuel cell electrocatalysts and other industrial catalysts. On the other hand, theoretical studies predicted that doping graphene with nitrogen can tailor its electronic properties and chemical reactivity. However, experimental investigations are still limited due to the lack of synthesis techniques that can deliver a reasonable quantity. We report here a novel bottom up approach for N-doped graphene based on a simple reaction of tetrachloromethane and lithium nitride under mild conditions. A gram scale N-graphene can be easily obtained in laboratory with varying nitrogen contents. The electronic structure perturbation in the graphene network due to the incorporation of nitrogen has been observed experimentally using STM, which is corroborated by density functional theory simulations. This method could enable a larger scale production since the one-pass yield only depends on the capacity of the autoclave. The obtained N-doped grapheme showed an enhanced activity as a catalyst for fuel cell cathode oxygen reduction reaction with respect to pure graphene and commercial carbon black XC-72.; Unique structural and electronic properties of graphene have evoked huge interest in its potential applications in a wide range of fields, e.g. nanoelectronic devices, sensors and catalysis. However, realization of these applications will rely on the availability of high quality graphene on a large scale. We developed here a non-liquid phase method for production of free-standing graphene nanosheets via one step thermal splitting of commercial polycrystalline silicon carbide granules. These graphene sheets contain few defects and exhibit a good stability against oxidation. This novel synthetic approach is expected to enable mass production of high quality graphene, which could promote further development of graphene-based technologies, in particular fuel cell electrocatalysts and other industrial catalysts. On the other hand, theoretical studies predicted that doping graphene with nitrogen can tailor its electronic properties and chemical reactivity. However, experimental investigations are still limited due to the lack of synthesis techniques that can deliver a reasonable quantity. We report here a novel bottom up approach for N-doped graphene based on a simple reaction of tetrachloromethane and lithium nitride under mild conditions. A gram scale N-graphene can be easily obtained in laboratory with varying nitrogen contents. The electronic structure perturbation in the graphene network due to the incorporation of nitrogen has been observed experimentally using STM, which is corroborated by density functional theory simulations. This method could enable a larger scale production since the one-pass yield only depends on the capacity of the autoclave. The obtained N-doped grapheme showed an enhanced activity as a catalyst for fuel cell cathode oxygen reduction reaction with respect to pure graphene and commercial carbon black XC-72.
语种英语
文献类型会议论文
条目标识符http://cas-ir.dicp.ac.cn/handle/321008/115898
专题中国科学院大连化学物理研究所
通讯作者Pan XL(潘秀莲); Bao XH(包信和)
推荐引用方式
GB/T 7714
Deng DH,Pan XL,Yu L,et al. Graphene and N-doped graphene for electrocatalysis[C]. 待补充:待补充,2011:74-0.
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