DICP OpenIR
Subject Area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)
Source PublicationPrecedings of Carbocat IV
Conference Name4th International Symposium on Carbon for Catalysis
Conference Date2010-11-7
2011
Conference Place大连
Pages74-0
Publisher待补充
Publication Place待补充
Cooperation Status墙报
Department502
Funding Organization大连化物所
AbstractUnique 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.
Language英语
Document Type会议论文
Identifierhttp://cas-ir.dicp.ac.cn/handle/321008/115898
Collection中国科学院大连化学物理研究所
Corresponding AuthorPan XL(潘秀莲); Bao XH(包信和)
Recommended Citation
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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