Journal
APPLIED SURFACE SCIENCE
Volume 496, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.apsusc.2019.143729
Keywords
MXenes; TiOF2; TiOF2@Ti3C2Tx; Hydrogen evolution reaction; Humidity sensor
Categories
Funding
- NSF of China [61574055, 61974041, 11974110]
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MXenes, a new class of two-dimensional materials, possessing high electrical conductivity and unique surface properties,have exhibited great potential as non-noble metal catalyst for hydrogen evolution reaction (HER). However, due to poor oxidation resistance, they are easily oxidized in aqueous solution and high humidity environment, resulting in a great loss of electronic properties and surface reactivity. Herein, we report a simple and effective composite synthesis strategy with TiOF2 intercalation to improve the stability of MXenes materials. TiOF2@Ti3C2Tx prepared by this strategy shows ultra-long catalytic activity life of 1000 cycles in acid electrolyte. Besides,the catalyst also shows high HER activity with a low onset potential of 103 mV and a Tafel slope as low as 56.2 mV dec(-1). Benefiting from the stabilization of TiOF2 and the physicochemical properties of Ti3C2Tx, TiOF2@Ti3C2Tx also exhibits excellent humidity sensitivity and stability.
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