三维石墨烯-碳纳米管复合材料的制备及其氧还原催化性能研究
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湖南省教育厅科学研究基金资助项目(19C0581),湖南省自然科学基金资助项目(2020JJ5142) ,湖南创新 型省份建设专项基金资助项目(2019RS2067),国家重点研发计划(2018YFB1502500)


Preparation of 3D Graphene and Carbon Nanotubes Composites with High Electrocatalytic Activity for Oxygen Reduction Reactions
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    摘要:

    采用化学气相沉积法(CVD)制备了硼、氮共掺杂三维石墨烯与碳纳米管复合的非金属电催化材料(B-N-G-CNT)。利用扫描电子显微镜(SEM)、能谱仪(EDS)、透射电子显微镜(TEM)对B-N-G-CNT的形貌、结构及成分进行了表征,结果显示:三维石墨烯-碳纳米管呈有序多孔网状结构,石墨烯与碳纳米管形成稳定的化学结合,具有质量高、缺陷少等优点。运用循环伏安法(CV)、旋转圆盘电极(RDE)、电流时间曲线(i-t curve)等手段测试了B-N-G-CNT在碱性介质中的氧还原电化学性能,结果表明:在浓度为0.1 mol·L-1 的KOH溶液中,B-N-G-CNT复合材料具有比 B-N-G更高的起始电位和半波势能,其电子转移数接近4电子;同时B-N-G-CNT比商业Pt/C具有更高的稳定性。

    Abstract:

    3D Boron and Nitrogen dual-doped graphene and carbon nanotubes (B-N-G-CNTs) was fabricated by chemical vapour deposition (CVD) method. The structure and morphology of the B-N-G-CNTs were investigated by scanning electron microscopy (SEM), energy disperse spectroscopy (EDS) and transmission electron microscopy (TEM). The results showed that the B-N-G-CNTs were of 3D porous graphene structure, the graphene and carbon nanotubes formed into a stable chemical bonding, showing the features of high quality and less defects. The electrocatalytic activity for oxygen reduction was demonstrated by cyclic voltammetry (CV), the rotating disk electrode (RDE) and Amperometeic (i-t curve) method. The electrochemical measurements showed the B-N-G-CNT was more efficient than B-N-G for ORR in terms of the onset/peak potential while a typical four-step pathway was seen for the B-N-G-CNT in an O2-saturated 0.1mol·L-1 KOH solution, and the catalytically active sites on the B-N-G-CNTs were much more durable than the commercial Pt/C electrode.

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伍小波,姜利民,钟豪胤,王 鹏,谭栋梁,何 涛,郭怀湘,谢志勇.三维石墨烯-碳纳米管复合材料的制备及其氧还原催化性能研究[J].包装学报,2020,12(4):1-7.

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  • 收稿日期:2020-05-22
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  • 在线发布日期: 2020-10-15
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