Hierarchical β-Mo2C Nanotubes Organized by Ultrathin Nanosheets as a Highly Efficient Electrocatalyst for Hydrogen Production
Hierarchical β-Mo2C Nanotubes Organized by Ultrathin Nanosheets as a Highly Efficient Electrocatalyst for Hydrogen Production
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DOI：
10.1002/anie.201508715
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发表时间：
2015-12-14
影响因子：
16.6
通讯作者：
Lou, Xiong Wen (David)
中科院分区：
文献类型：
--
作者：
Ma, Fei-Xiang;Wu, Hao Bin;Lou, Xiong Wen (David)
电化学水裂解制氢一直受到铂等贵金属析氢催化剂昂贵的阻碍。在这项工作中，由多孔纳米片构建的新型分层β - mo2c纳米管被制成并研究了作为HER的高性能和低成本电催化剂。采用一种不同寻常的模板参与策略，可控地合成了mo -聚多巴胺纳米管，并通过高温直接渗碳将其转化为分层的β - mo2c纳米管。由于具有超细原生纳米晶、大暴露表面、快速电荷转移和独特的管状结构等结构优势，制备的分层β - mo2c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，过电位小，稳定性好。
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 beta-Mo2C 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 beta-Mo2C 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 beta-Mo2C nanotubes exhibit excellent electrocatalytic performance for HER with small overpotential in both acidic and basic conditions, as well as remarkable stability.