Razavi, Mina and Sookhakian, Mehran and Goh, Boon Tong and Bahron, Hadariah and Mahmoud, Eyas and Alias, Yatimah (2022) Molybdenum disulfide nanosheets decorated with platinum nanoparticle as a high active electrocatalyst in hydrogen evolution reaction. Nanoscale Research Letters, 17 (1). ISSN 1931-7573, DOI https://doi.org/10.1186/s11671-021-03644-6.
Full text not available from this repository.Abstract
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.
| Item Type: | Article |
|---|---|
| Funders: | AUA-UAEU Joint Research Grant Project [IF016-2021] [G00003485] |
| Uncontrolled Keywords: | Platinum nanoparticles; Molybdenum disulfide; Electrocatalyst; Hydrogen evolution reaction; Acidic medium |
| Subjects: | Q Science > QC Physics T Technology > TA Engineering (General). Civil engineering (General) |
| Divisions: | Faculty of Science > Department of Chemistry Faculty of Science > Department of Physics |
| Depositing User: | Ms. Juhaida Abd Rahim |
| Date Deposited: | 03 Aug 2022 00:45 |
| Last Modified: | 03 Aug 2022 00:45 |
| URI: | http://eprints.um.edu.my/id/eprint/33490 |
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