TY - JOUR
T1 - Molybdenum Disulfide Nanosheets Decorated with Platinum Nanoparticle as a High Active Electrocatalyst in Hydrogen Evolution Reaction
AU - Razavi, Mina
AU - Sookhakian, M.
AU - Goh, Boon Tong
AU - Bahron, Hadariah
AU - Mahmoud, Eyas
AU - Alias, Y.
N1 - Funding Information:
This research is supported by the AUA-UAEU Joint Research Grant Project (IF016-2021 and G00003485).
Publisher Copyright:
© 2021, The Author(s).
PY - 2022
Y1 - 2022
N2 - Electrochemical hydrogen evolution reaction (HER) refers to the process of generating hydrogen by splitting water molecules with applied external voltage on the active catalysts. HER reaction in the acidic medium can be studied by different mechanisms such as Volmer reaction (adsorption), Heyrovsky reaction (electrochemical desorption) or Tafel reaction (recombination). In this paper, facile hydrothermal methods are utilized to synthesis a high-performance metal-inorganic composite electrocatalyst, consisting of platinum nanoparticles (Pt) and molybdenum disulfide nanosheets (MoS2) with different platinum loading. The as-synthesized composite is further used as an electrocatalyst for HER. The as-synthesized Pt/Mo-90-modified glassy carbon electrode shows the best electrocatalytic performance than pure MoS2 nanosheets. It exhibits Pt-like performance with the lowest Tafel slope of 41 mV dec−1 and superior electrocatalytic stability in an acidic medium. According to this, the HER mechanism is related to the Volmer-Heyrovsky mechanism, where hydrogen adsorption and desorption occur in the two-step process. According to electrochemical impedance spectroscopy analysis, the presence of Pt nanoparticles enhanced the HER performance of the MoS2 nanosheets because of the increased number of charge carriers transport.
AB - Electrochemical hydrogen evolution reaction (HER) refers to the process of generating hydrogen by splitting water molecules with applied external voltage on the active catalysts. HER reaction in the acidic medium can be studied by different mechanisms such as Volmer reaction (adsorption), Heyrovsky reaction (electrochemical desorption) or Tafel reaction (recombination). In this paper, facile hydrothermal methods are utilized to synthesis a high-performance metal-inorganic composite electrocatalyst, consisting of platinum nanoparticles (Pt) and molybdenum disulfide nanosheets (MoS2) with different platinum loading. The as-synthesized composite is further used as an electrocatalyst for HER. The as-synthesized Pt/Mo-90-modified glassy carbon electrode shows the best electrocatalytic performance than pure MoS2 nanosheets. It exhibits Pt-like performance with the lowest Tafel slope of 41 mV dec−1 and superior electrocatalytic stability in an acidic medium. According to this, the HER mechanism is related to the Volmer-Heyrovsky mechanism, where hydrogen adsorption and desorption occur in the two-step process. According to electrochemical impedance spectroscopy analysis, the presence of Pt nanoparticles enhanced the HER performance of the MoS2 nanosheets because of the increased number of charge carriers transport.
KW - Acidic medium
KW - Electrocatalyst
KW - Hydrogen evolution reaction
KW - Molybdenum disulfide
KW - Platinum nanoparticles
UR - http://www.scopus.com/inward/record.url?scp=85122757095&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85122757095&partnerID=8YFLogxK
U2 - 10.1186/s11671-021-03644-6
DO - 10.1186/s11671-021-03644-6
M3 - Article
AN - SCOPUS:85122757095
SN - 1931-7573
VL - 17
JO - Nanoscale Research Letters
JF - Nanoscale Research Letters
IS - 1
M1 - 9
ER -