Madadkhani, Sepideh Nandy, Subhajit Chae, Keun Hwa Aleshkevych, Pavlo Najafpour, Mohammad Mahdi 2024-05-30T10:00:31Z 2024-05-30T10:00:31Z 2024-05-30 2024-05 1948-7185 https://pubs.kist.re.kr/handle/201004/149976 Tungsten disulfide (WS2), a promising electrocatalyst made from readily available materials, demonstrates significant effectiveness in the hydrogen-evolution reaction (HER). The study conducts a thorough investigation using various analytical methods such as scanning electron microscopy (SEM), transmission electron microscopy (TEM), energy dispersive spectrometry (EDS), X-ray diffraction (XRD), X-ray absorption spectroscopy (XAS), electron paramagnetic resonance (EPR), and in situ Raman spectroscopy. These techniques have uncovered changes in the WS2 particle structure during HER. Through employing EPR, XAS, and in situ Raman spectroscopy, the research reveals structural and chemical transformations. This includes the formation of novel W species and signs of W-O bond formation. Moreover, significant changes in the morphology of the particles were observed. These findings offer enhanced insights into the mechanisms of WS2 under HER conditions, highlighting its catalytic performance and durability. English American Chemical Society Advances in Understanding Tungsten Disulfide Dynamics during the Hydrogen-Evolution Reaction: An Initial Step in Elucidating the Mechanism Article 10.1021/acs.jpclett.4c00924 1 The Journal of Physical Chemistry Letters, v.15, no.19, pp.5112 - 5119 The Journal of Physical Chemistry Letters 15 19 5112 5119 N scie scopus 001225074400001 2-s2.0-85192814274 Chemistry, Physical Nanoscience & Nanotechnology Materials Science, Multidisciplinary Physics, Atomic, Molecular & Chemical Chemistry Science & Technology - Other Topics Materials Science Physics Article FIELD-EFFECT TRANSISTOR DICHALCOGENIDES TRANSITION EFFICIENT ALKALINE NANOPARTICLES NANOSHEETS COS2 FILM