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首页> 外文期刊>RSC Advances >Efficient synthesis of nitrogen-doped carbon with flower-like tungsten nitride nanosheets for improving the oxygen reduction reactions
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Efficient synthesis of nitrogen-doped carbon with flower-like tungsten nitride nanosheets for improving the oxygen reduction reactions

机译：花状氮化钨纳米片有效合成氮掺杂碳以改善氧还原反应

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A novel three-dimensional (3D) electrocatalyst composite was successfully prepared through a facile hydrothermal method, consisting of tungsten nitride nanosheets with flower-like morphology (WN FNs) and nitrogen-doped carbon black (N–C). Highly crystalline WN FNs were observed to be uniformly distributed in N–C, and remarkably promoted the catalytic activities toward oxygen reduction reaction (ORR) of the N–C. Moreover, the electrochemical results proved that, WN FNs/N–C composite shows a significantly higher ORR activity with a 4-electron transfer pathway and limiting current density of 5.8 mA cm?2 in alkaline solutions. The stability test of the nanocomposite showed less degradation after 5 h and its methanol tolerance also was enhanced compared with Pt/C. The improved performance of the WN FNs/N–C composite can be attributed to its unique configuration and the increased exposure of active sites, which suggests that it could serve as an ideal candidate for developing high performance ORR catalysts.
机译：通过一种简便的水热方法成功地制备了一种新型的三维（3D）电催化剂复合材料，该复合材料由具有花状形态的氮化钨纳米片（WN FNs）和氮掺杂的炭黑（NC）组成。观察到高度结晶的WN FNs在N–C中均匀分布，并显着促进了N–C的对氧还原反应（ORR）的催化活性。此外，电化学结果证明，WN FNs / NC复合材料具有显着更高的ORR活性，具有四电子转移途径，极限电流密度为5.8 mA cm ？2 在碱性溶液中。与Pt / C相比，纳米复合材料的稳定性测试显示5小时后降解较少，并且其甲醇耐受性也得到增强。 WN FNs / NC复合材料性能的提高可归因于其独特的构型和活性部位暴露的增加，这表明它可以作为开发高性能ORR催化剂的理想选择。

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