电催化氢气析出Mo基催化剂研究进展

Research Progresses in Mo-based Catalysts for Electrocatalystic Hydrogen Evolution Reaction

作为一种绿色可持续的制备氢气方法,电催化析氢反应受到广泛的关注。高效且低成本的电催化析氢催化剂的研发对制氢技术的提升,促进氢能工业化的发展具有重要意义。本文综述了近年来在Mo基电化学析氢催化剂方面的研究成果和进展,主要介绍了Mo基硫化物,Mo基碳化物,Mo基磷化物,Mo合金等,探讨了这些催化剂的合成技术,结构特性,HER性能以及结构与析氢性能之间的关系。Mo基硫化物的稳定性高,但活性有待提高;Mo基碳化物活性较好,但合成温度较高且表面易积碳堵塞孔道;Mo基磷化物导电性较高,但稳定性欠佳;Mo合金的制备简单,原料易得,但在碱性溶液中的溶出效应会降低催化活性。最后提出能提高析氢催化活性的方法,并对未来Mo基催化剂的优化方向进行了展望。

As a green and sustainable method to prepare hydrogen,electrocatalytic hydrogen evolution reaction has attracted a wide spread attention.Development of high-efficiency and low-cost electrocatalysist can promote the technology of hydrogen production and has a great significance for developing industrialization of hydrogen.In this article,the research progresses of electrocatalytic hydrogen evolution reaction is briefly reviewed firstly,then the Mo-based sulfides,Mo-based carbides,Mo-based phosphides,Mo-based alloys are mainly discussed.The synthetic methods,structure characteristics,their HER performance and the relationship between the structure and performance are analyzed.Mo-based sulfide catalysts possess superior stability,but their HER catalytic activity is relatively poor;the Mo-based carbide catalysts have better HER catalytic activity,but the synthesis temperature is relatively higher and carbon is liable to deposited on the surface of catalyst to block pores;Mo-based phosphide catalysts have excellent conductivity,but their stability is relatively poor;Mo-based alloys catalysts have the advantages of convenience for preparation and availability of the raw materials,but dissolution effect will reduce the catalytic activity in alkali solutions.The article proposes methods to improve the electrocatalytic activity of catalysts and predicates optimal direction of Mo-based catalysts in the future.