Ni@Mo2C/NC纳米复合物的制备及其电催化析氢性能研究
Preparation of Ni@Mo2C/NC Nanocomposites and Their Study in Electrocatalytic Hydrogen Evolution Performance
摘要: 众所周知，在水裂解的氢气分解反应中，寻求高效且经济成本低的电催化剂对于开发清洁和可再生能源至关重要。然而，这仍然是一个巨大的挑战。而电催化剂的设计是实现析氢催化活性的重要途径。基于此，本文以无水柠檬酸作为螯合剂和分散剂，杂化粒子均匀的分布在氮掺杂碳基底上，制备了Ni@Mo2C/NC纳米复合材料。电化学测试表明，Ni@Mo2C/NC复合材料在碱性条件下有着较小的析氢过电位，并拥有较好的稳定性。这主要归因于Ni与Mo2C的耦合作用能显著减小粒子的尺寸，增加了活性位点。石墨-N、吡啶-N和吡咯-N具有丰富的电子，增加了氮掺杂碳表面的电子密度，促进了氢的吸附和析氢过程。
Abstract: As well known for the hydrogen evolution reaction (HER) of water splitting, it is very important to explore an efficient and cost-effective electrocatalyst for the development of clean and renewable energy. However, there still remains a huge challenge in design of highly catalytic activity for HER. Herein, this work employs anhydrous citric acid as a chelating and dispersing agent, and the hybrid particles are uniformly distributed on a nitrogen doped carbon substrate to prepare Ni@Mo2C/NC nanocomposite. Electrochemical tests indicate that the Ni@Mo2C/NC catalyst presented a small HER over-potential and good stability in acidic media. This is mainly due to the coupling effect of Ni and Mo2C, which can significantly reduce the particle size and increase the active site. In addition, graphene-N, pyridine-N, and pyrrole-N with abundant electrons could increase the electron density on the surface of nitrogen doped carbon and promote the hydrogen adsorption and evolution.
文章引用：陈荟媛, 秦天, 杨贝贝, 宾端. Ni@Mo2C/NC纳米复合物的制备及其电催化析氢性能研究[J]. 物理化学进展, 2023, 12(4): 387-396. https://doi.org/10.12677/JAPC.2023.124037

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