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Engineering Ultrathin MoS 2 Nanosheets on Co x P/Nitrogen‐Doped Carbon Nanocubes for Efficient Hydrogen Evolution
Author(s) -
Chen Danyang,
Zhou Hu,
Xiao Jinghao,
Yuan Aihua
Publication year - 2020
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.202001837
Subject(s) - tafel equation , overpotential , materials science , catalysis , electrochemistry , carbon fibers , chemical engineering , nitrogen , nanotechnology , hydrogen , doping , electrode , chemistry , composite number , optoelectronics , composite material , organic chemistry , engineering
Designing core‐shell heterostructures is essential for electrocatalytic hydrogen evolution reaction (HER). In this study, ultrathin MoS 2 sheets are uniformly anchored on Co x P/nitrogen dual‐doped carbon nanocubes (Co x P/NC) through a template sacrificial method followed by a hydrothermal reaction. The resultant hybrid Co x P/NC@MoS 2 possesses a core‐shell structure and superior catalytic activity to individual counterparts. The hybrid catalyst needs a low overpotential of 148 mV to drive the current density of 10 mA cm −2 , together with an extremely small Tafel slope of 33 mV dec −1 and outstanding stability in acidic media. Most importantly, the best catalytic activity is achieved by coupling MoS 2 nanosheets with the matrix Co x P/NC rather than Co/NC. The remarkably high HER activity of Co x P/NC@MoS 2 mainly benefits from the core‐shell feature and strong synergistic interaction between Co x P/NC and MoS 2 . The present study inspires a continuous exploration of engineering MoS 2 nanosheets on nanostructured metal phosphides for electrochemical applications.