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Facial Synthesis of 1T Phase MoS 2 Nanoflowers via Anion Exchange Method for Efficient Hydrogen Evolution
Author(s) -
Li Jinming,
Qi Weihong,
Li Yejun
Publication year - 2019
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.201803442
Subject(s) - tafel equation , overpotential , catalysis , yield (engineering) , materials science , exchange current density , hydrogen production , phase (matter) , ion , chemical engineering , ion exchange , hydrogen , nanotechnology , chemistry , electrochemistry , electrode , composite material , organic chemistry , engineering
In this work, a low cost and high yield method is proposed to synthesize 1T phase MoS 2 nanoflowers (NFs) by means of anion exchange using MoO 3 nanosheets as the exchange template. The synthesized MoS 2 NFs are composed of ultrathin MoS 2 nanoflakes with plenty of active edge sites, large specific surface area, and rich defects, as well as reduced intrinsic resistance. Therefore, they show enhanced hydrogen evolution reaction (HER) activity with an overpotential of 166 mV at 10 mA cm −2 and Tafel slope of 47 mV dec −1 , better than those of previously reported MoS 2 ‐based HER catalysts. A systematic study is carried out on the effects of mass loading and reaction temperature on its catalytic performance. It is shown that, with reaction temperature of 200 °C and mass loading of 0.43 mg cm −2 , the obtained MoS 2 NFs show the optimal HER activity. The present work provides a facile and cost‐effective way to synthesize 1T MoS 2 NFs with advanced HER performances, indicating significant potential for larger‐scale production in practical industrial applications.