Catalytic properties of vanadium diselenide: a comprehensive study on ıts electrocatalytic performance in alkaline, neutral, and acidic media
Date
2017Source Title
ACS Omega
Print ISSN
2470-1343
Publisher
American Chemical Society
Volume
2
Issue
11
Pages
8319 - 8329
Language
English
Type
ArticleItem Usage Stats
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Abstract
Here, we report the synthesis of vanadium
diselenide (VSe2) three-dimensional nanoparticles (NPs) and
two-dimensional (2D) nanosheets (NSs) utilizing nanosecond
pulsed laser ablation technique followed by liquid-phase
exfoliation. Furthermore, a systematic study has been
conducted on the effect of NP and NS morphologies of
VSe2 in their catalytic activities toward oxygen reduction
reaction (ORR), oxygen evolution reaction (OER) and
hydrogen evolution reaction (HER) under alkaline, neutral,
and acidic conditions. Research on VSe2 clearly demonstrates that these morphologies do not have a significant difference for
ORR and OER; however, a drastic effect of morphology was observed for HER. The ORR activity of both NSs and NPs involves
∼2.85 numbers of electrons with the Tafel slope of 120 mV/dec in alkaline and neutral pH. In alkaline solution, NPs are proved
to be an efficient catalyst for OER with an onset potential 1.5 V; however, for HER, NSs have a better onset potential of −0.25 V.
Moreover, the obtained NPs have also better catalytic activity with a 400 mV anodic shift in the onset potential compared to NSs.
These results provide a reference point for the future application of VSe2 in energy storage and conversion devices and mass
production of other 2D materials.