School of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, Singapore, 637459 (Singapore) http://www.ntu.edu.sg/home/xwlou/
School of Materials Science and Engineering, Harbin Institute of Technology, Harbin, 150001 (China).
Angew Chem Int Ed Engl. 2015 Dec 14;54(51):15395-9. doi: 10.1002/anie.201508715. Epub 2015 Nov 3.
Production of hydrogen by electrochemical water splitting has been hindered by the high cost of precious metal catalysts, such as Pt, for the hydrogen evolution reaction (HER). In this work, novel hierarchical β-Mo2 C nanotubes constructed from porous nanosheets have been fabricated and investigated as a high-performance and low-cost electrocatalyst for HER. An unusual template-engaged strategy has been utilized to controllably synthesize Mo-polydopamine nanotubes, which are further converted into hierarchical β-Mo2 C nanotubes by direct carburization at high temperature. Benefitting from several structural advantages including ultrafine primary nanocrystallites, large exposed surface, fast charge transfer, and unique tubular structure, the as-prepared hierarchical β-Mo2 C nanotubes exhibit excellent electrocatalytic performance for HER with small overpotential in both acidic and basic conditions, as well as remarkable stability.
电化学水分解制氢受到贵金属催化剂（如 Pt）成本高的限制，而这些催化剂对于析氢反应（HER）至关重要。在这项工作中，我们制备了一种新型的由多孔纳米片构成的分级β-Mo2 C 纳米管，并将其作为一种高性能、低成本的 HER 电催化剂进行了研究。我们采用了一种独特的模板参与策略来可控合成 Mo-聚多巴胺纳米管，然后通过在高温下直接碳化进一步将其转化为分级β-Mo2 C 纳米管。得益于包括超细的一次纳米晶、大的暴露表面、快速的电荷转移和独特的管状结构在内的多种结构优势，所制备的分级β-Mo2 C 纳米管在酸性和碱性条件下均表现出优异的 HER 电催化性能，具有较小的过电势和显著的稳定性。
