Incorporating ultra-small N-doped Mo2C nanoparticles onto 3D N-doped flower-like carbon nanospheres for robust electrocatalytic hydrogen evolution
Incorporating ultra-small N-doped Mo2C nanoparticles onto 3D N-doped flower-like carbon nanospheres for robust electrocatalytic hydrogen evolution
复制标题
将超小型氮掺杂 Mo2C 纳米粒子整合到 3D 氮掺杂花状碳纳米球上，以实现强大的电催化析氢
DOI：
10.1016/j.nanoen.2021.106047
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发表时间：
2021-04
期刊：
影响因子：
17.6
通讯作者：
Shun Wang
中科院分区：
文献类型：
--
作者：
Huifang Wei;Jiahui Wang;Qian Lin;Yanwen Zou;Xi’an Chen;Huaping Zhao;Jun Li;Huile Jin;Yong Lei;Shun Wang
开发高效、稳定的析氢反应电催化剂是实现电催化水裂解制氢的关键。在阳离子表面活性剂的辅助下，制备了具有氧化表面的超小氮掺杂碳化钼（N-Mo2C）纳米颗粒，并将其固定在三维氮掺杂花状碳纳米球（NFCNS）上，进一步研究了N-Mo2C/NFCNS复合材料作为HER电催化剂的作用。分析结果表明，在Mo2C的晶格和碳骨架中都掺杂了氮原子，使得Mo-H键的解吸能较低，有利于氢气的析出。此外，NFCNS的高比面积使N-Mo2C纳米颗粒富集，其开放的框架有利于离子的快速扩散。结果表明，N-Mo2C/NFCNS复合材料表现出令人印象深刻的HER活性，具有过电位低、tafelslope小、在酸性和碱性介质中都具有优异的耐久性，优于大多数已报道的mo基HER催化剂，也与商业Pt/C催化剂高度相似。这项工作不仅局限于HER电催化剂，还将为定制用于氧还原反应、析氧反应、氮还原反应等的高效碳/金属化合物电催化剂开辟新的途径。
Developing highly-efficient and stable hydrogen evolution reaction (HER) electrocatalysts plays a crucial role in realizing the hydrogen production from electrocatalytic water splitting. Herein, ultra-small and nitrogen-doped molybdenum carbide (N-Mo2C) nanoparticles with oxidized surfaces are facilely synthesized with the assistance of cationic surfactants and simultaneously anchored onto three-dimensional nitrogen-doped flower-like carbon nanospheres (NFCNS), and the N-Mo2C/NFCNS composites are further investigated as HER electrocatalysts. Analysis results reveal that nitrogen atoms are doped into both the lattice and the carbon framework of Mo2C, resulting in low desorption energy of Mo-H bond for the easy evolution of hydrogen gas. Moreover, the high specific area of NFCNS enables enrichment of N-Mo2C nanoparticles, and its open framework facilitates fast ion diffusion. As a result, the N-Mo2C/NFCNS composites exhibit impressive HER activities with low overpotential, smallTafelslope, and excellent durability in both acidic and alkaline media, which outperform most of the reported Mo-based HER catalysts and are also highly comparable to the commercial Pt/C catalyst. Not limited to HER electrocatalysts, this work should open a new avenue for tailoring highly-efficient carbon/metal compounds-based electrocatalysts for oxygen reduction reaction, oxygen evolution reaction, nitrogen reduction reaction, etc.
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影响因子：
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