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Nitrogen-doped Hierarchical Mesoporous/Macroporous Carbon (H-C) prepared from the combined silica templates with different size for Oxygen Reduction

机译：由不同尺寸的组合二氧化硅模板制备的氮掺杂多级介孔/大孔碳（H-C），用于减少氧气

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摘要

In this work, by combining a simple two-step graphitization of the impregnated carbon, we have synthesized novel nitrogen-doped hierarchical mesoporous/macroporous carbon (H-C) with high efficient catalytic activity for ORR by mixing two or more kinds of particle size controlled silica template agent. Results of electrochemical characterization, which was performed using cyclic voltammetry (CV) and linear sweep voltammetry (LSV) employing a rotating disk electrode (RDE), with emphasis on the activity of the catalyst are presented. The catalytic activity was found to depend strongly on the porous structure. The resulting H-C obtained from the binary nanosilica template (15nm/500nm = 9:1 in mass) exhibits the highest catalytic performance in terms of ORR among the catalysts studied, where the onset potential at 0.2V, half-wave potential at 0.03V and average transferred electron number at 3.50, were achieved in alkaline media.
机译：在这项工作中，通过将浸渍碳的简单两步石墨化相结合，我们通过混合两种或更多种粒度控制的二氧化硅，合成了对ORR具有高效催化活性的新型氮掺杂分级介孔/大孔碳（HC）模板代理。给出了使用循环伏安法（CV）和使用旋转圆盘电极（RDE）的线性扫描伏安法（LSV）进行的电化学表征结果，重点是催化剂的活性。发现催化活性强烈取决于多孔结构。从二元纳米二氧化硅模板（质量为15nm / 500nm = 9：1）获得的HC在所研究的催化剂中，在ORR方面表现出最高的催化性能，其中起始电势为0.2V，半波电势为0.03V，在碱性介质中获得的平均转移电子数为3.50。

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  • 会议地点 Chicago IL(US)
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    Mingjie Wu; Jingjing Shi; Qiang Wang; Jinli Qiao; Yuyu Liu;

  • 作者单位

    College of Environmental Science and Engineering, Donghua Universtiy, 2999 Ren'min North Road, Shanghai 201620, China;

    College of Environmental Science and Engineering, Donghua Universtiy, 2999 Ren'min North Road, Shanghai 201620, China;

    State Grid Shanghai Songjiang Electric Power Supply Company, 336, Ledu Rd., Songjiang Area, Shanghai 201600, P. R. China;

    College of Environmental Science and Engineering, Donghua Universtiy, 2999 Ren'min North Road, Shanghai 201620, China;

    Multidisciplinary Research on the Circulation of Waste Resources, Graduate School of Environmental Studies, Tohoku University. 6-6-11 Aoba-Aramaki-Aza, Aoba-ku, Sendai, 980-8579, Japan;

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