Mo2C nanoparticles embedded within bacterial cellulose-derived 3D N-doped carbon nanofiber networks for efficient hydrogen evolution
Mo2C nanoparticles embedded within bacterial cellulose-derived 3D N-doped carbon nanofiber networks for efficient hydrogen evolution
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DOI：
10.1038/am.2016.87
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发表时间：
2016-07
影响因子：
9.7
通讯作者：
Zhen-Yu Wu;Bi‐Cheng Hu;Ping Wu;Haiwei Liang;Zhi-Long Yu;Yue Lin;Ya-Rong Zheng;Zhenyu Li;
中科院分区：
文献类型：
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作者：
Zhen-Yu Wu;Bi‐Cheng Hu;Ping Wu;Haiwei Liang;Zhi-Long Yu;Yue Lin;Ya-Rong Zheng;Zhenyu Li;
碳化钼（Mo 2c）被认为是一种很有前途的非贵金属析氢反应（HER）电催化剂。在这项工作中，我们报告了一种简单、绿色、低成本和可扩展的方法，用于合成基于Mo 2c的HER电催化剂，该电催化剂由超细Mo 2c纳米颗粒组成，该纳米颗粒嵌入细菌纤维素衍生的3D n掺杂碳纳米纤维网络（Mo 2c @ N-CNFs），使用3D纳米结构生物质作为前体。该电催化剂具有显著的HER活性（167 mV过电位达到10 mA cm−2，交换电流密度为4.73× 10−2 mA cm−2），在酸性介质中具有良好的稳定性，在中性和碱性介质中具有较高的HER活性。进一步的理论计算表明，在Mo 2 C@ N-CNF催化剂中，Mo 2 C纳米颗粒和N-CNF之间存在很强的协同效应，从而导致令人印象深刻的HER性能。
Molybdenum carbide (Mo 2 C) has been considered as a promising non-noble-metal hydrogen evolution reaction (HER) electrocatalyst for future clean energy devices. In this work, we report a facile, green, low-cost and scalable method for the synthesis of a Mo 2 C-based HER electrocatalyst consisting of ultrafine Mo 2 C nanoparticles embedded within bacterial cellulose-derived 3D N-doped carbon nanofiber networks (Mo 2 C@ N-CNFs) using 3D nanostructured biomass as a precursor. The electrocatalyst exhibits remarkable HER activity (an overpotential of 167 mV achieves 10 mA cm− 2 and a high exchange current density of 4.73× 10− 2 mA cm− 2) and excellent stability in acidic media as well as high HER activity in neutral and basic media. Further theoretical calculations indicate a strong synergistic effect between Mo 2 C nanoparticles and N-CNFs in the Mo 2 C@ N-CNF catalyst, which leads to an impressive HER performance.