氢气因清洁和可再生等优点,被认为是一种具有发展前景的清洁能源,在未来替代传统化石燃料的可再生能源体系中具有重要地位。电化学分解水是一种高效且环境友好的制氢途径,在电解水制氢技术的发展中,高效电催化析氢催化剂的作用显得尤为重要。二硫化钼(MoS2)具有较低的析氢吉布斯自由能及耐酸碱腐蚀等优点,因此,MoS2作为高效的电催化析氢催化剂一直是研究热点。阐述了MoS2的电催化析氢机理,综述了不同形貌MoS2在电催化析氢中的应用,通过对MoS2电催化剂进行改性来优化其催化活性。研究表明通过改善MoS2边缘位点的催化活性、增加活性位点的数量等方法能够极大地改善MoS2电化学析氢过程中的催化活性。
Hydrogen is considered to be a promising clean energy due to its clean and renewable advantages,and it will play an important role in the renewable energy system to replace traditional fossil fuels in the future.Electrochemical decomposition of water is an efficient and environmentally friendly way of hydrogen production.In the development of water electrolysis hydrogen production technology,the role of efficient electrocatalytic hydrogen evolution catalyst has become particularly important.Molybdenum disulfide (MoS2) has the advantages of lower Gibbs free energy for hydrogen evolution and resistance to acid and alkali corrosion,therefore,it has been a research hotspot as an efficient electrocatalytic hydrogen evolution catalyst.In this paper,the mechanism of electrocatalytic hydrogen evolution reaction was described,and the application of MoS2 with different morphologies in electrocatalytic hydrogen evolution was reviewed.MoS2 electrocatalysts were modified to optimize their catalytic activity.The studies showed that the catalytic activity of MoS2 in the electrochemical hydrogen evolution process could be greatly enhanced by improving the catalytic activity of MoS2 edge sites and increasing the number of active sites.
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基金资助
国家自然科学基金面上项目(21671092);辽宁省”兴辽英才“创新领军人才项目(XLYC1802057);辽宁省-沈阳材料科学国家研究中心联合研发基金项目(2019010280-JH3/301)
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