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.com
Volume 5, Issue 5
Res. Rev. J Mat. Sci. 2017
ISSN: 2321-6212
Advanced Materials 2017
September 07-08, 2017
September 07-08, 2017 | Edinburgh, Scotland
Advanced materials & Processing
11
th
International Conference on
Electrochemical decoration of MoS2 nanoplatelet arrays with Pt quantum dots for high efficient water splitting
Arnas Naujokaitis
1
, Kestutis Arlauskas
2
, Rokas Zalneravicius
3
and
Arunas Jagminas
4
1
Vilnius University, Lithuania
2
NCPTS, Lithuania
S
tatement of the Problem: Water splitting via low-cost electrocatalysis is crucial for the development of clean energy from renewable
sources.1 However, high cost of the prior Pt and Ir/Ru-based catalysts hinder their wide usage. Consequently, development of cost-
effective electrocatalysts recently is of great significance. Currently, molybdenum disulfide (MoS
2
) nanoplatelet arrays are extensively
investigated as electrocatalysts for hydrogen evolution reaction (HER) in the acidic solutions proceeding preferentially at the exposed
edge sites of MoS
2
nanosheets. In fact, MoS
2
-based catalysts with increased active for HER sites, as well as doped with Ni and Co
atoms, enhance HER efficiency.2 Nevertheless, they still demonstrate the HER efficiencies in times lower than at the surface of bulk
Pt. The purpose of this study is to describe our experience of seeking markedly enhance the efficiency of MoS
2
electrocatalysts for
HER throughout decoration with numerous Pt quantum dots (QDs). Methodology: Crystalline nanoplatelet-shaped MoS
2
arrays
were formed at the surface of various substrates by hydrothermal synthesis. FE-SEM, HR-TEM, EDX analysis and cyclic voltammetry
were employed. Findings: We have showed that a significant improvement of HER efficiency at the nanoplatelet MoS
2
substrates can
be obtained via a simple decoration with extremely low amount of Pt QDs, ca 6.0 mg/cm
2
, deposited both at the nanoplatelet edges
and at the basal planes (Figure 1b). To the best of our knowledge, the reported by us decoration approach of MoS
2
nanoplatelets with
Pt QDs and Nps3-5 has not been explored for superior improvement of HER efficiency. Conclusion & Significance: This work opens
new further opportunities for significant improving the efficiency of HER at nanoplatelet MoS
2
substrates.
Biography
Arnas Naujokaitis is a PhD student in Vilnius University and also working as junior scientific researcher at The National Centre of Physical and Technological
Sciences (NCPTS). He already has decent experience in MoS
2
layers formation and characterization. As a result, there are three publications in this research.
Another fields of interest are materials deposition, synthesis and growth techniques, also electron microscopy and material characterization methods.
arnas.naujokaitis@gmail.comArnas Naujokaitis et al., Res. Rev. J Mat. Sci. 2017, 5:5
DOI: 10.4172/2321-6212-C1-006
Figure1:
Top-side FESEM images of nanoplatelet
MoS2 array before (a) and after (b) electrochemical
decoration with plentiful amount of Pt QDs.