title: Hierarchical β-Mo2 C Nanotubes Organized by Ultrathin Nanosheets as a Highly Efficient Electrocatalyst for Hydrogen Production.
abstract: 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.
authors.affiliation: 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).
authors.forename: Fei-Xiang
authors.initials: FX
authors.lastname: Ma
authors.affiliation: School of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, Singapore, 637459 (Singapore) http://www.ntu.edu.sg/home/xwlou/
authors.forename: Hao Bin
authors.initials: HB
authors.lastname: Wu
authors.affiliation: School of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, Singapore, 637459 (Singapore) http://www.ntu.edu.sg/home/xwlou/
authors.forename: Bao Yu
authors.initials: BY
authors.lastname: Xia
authors.affiliation: School of Materials Science and Engineering, Harbin Institute of Technology, Harbin, 150001 (China).
authors.forename: Cheng-Yan
authors.initials: CY
authors.lastname: Xu
authors.affiliation: School of Chemical and Biomedical Engineering, Nanyang Technological University, 62 Nanyang Drive, Singapore, 637459 (Singapore) http://www.ntu.edu.sg/home/xwlou/. xwlou@ntu.edu.sg.
authors.forename: Xiong Wen David
authors.initials: XW
authors.lastname: Lou
keywords: electrocatalysis; hydrogen evolution reaction; molybdenum carbide; nanosheets; nanotubes