TY - JOUR
T1 - Facile Synthesis of Molybdenum Diselenide Layers for High-Performance Hydrogen Evolution Electrocatalysts
AU - Vikraman, Dhanasekaran
AU - Hussain, Sajjad
AU - Akbar, Kamran
AU - Adaikalam, Kathalingam
AU - Lee, Seung Hu
AU - Chun, Seung Hyun
AU - Jung, Jongwan
AU - Kim, Hyun Seok
AU - Park, Hui Joon
N1 - Publisher Copyright:
Copyright © 2018 American Chemical Society.
PY - 2018/5/31
Y1 - 2018/5/31
N2 - A cost-effective solution-based synthesis route to grow MoSe2 thin films with vertically aligned atomic layers, thereby maximally exposing the edge sites on the film surface as well as enhancing charge transport to the electrode, is demonstrated for hydrogen evolution reaction. The surface morphologies of thin films are investigated by scanning electron microscopy and atomic force microscopy, and transmission electron microscopy analyses confirm the formation of the vertically aligned layered structure of MoSe2 in those films, with supporting evidences obtained by Raman. Additionally, their optical and compositional properties are investigated by photoluminescence and X-ray photoelectron spectroscopy, and their electrical properties are evaluated using bottom-gate field-effect transistors. The resultant pristine MoSe2 thin film exhibited low overpotential of 88 mV (at 10 mA·cm-2) and a noticeably high exchange current density of 0.845 mA·cm-2 with excellent stability, which is superior to most of other reported MoS2 or MoSe2-based catalysts, even without any other strategies such as doping, phase transformation, and integration with other materials.
AB - A cost-effective solution-based synthesis route to grow MoSe2 thin films with vertically aligned atomic layers, thereby maximally exposing the edge sites on the film surface as well as enhancing charge transport to the electrode, is demonstrated for hydrogen evolution reaction. The surface morphologies of thin films are investigated by scanning electron microscopy and atomic force microscopy, and transmission electron microscopy analyses confirm the formation of the vertically aligned layered structure of MoSe2 in those films, with supporting evidences obtained by Raman. Additionally, their optical and compositional properties are investigated by photoluminescence and X-ray photoelectron spectroscopy, and their electrical properties are evaluated using bottom-gate field-effect transistors. The resultant pristine MoSe2 thin film exhibited low overpotential of 88 mV (at 10 mA·cm-2) and a noticeably high exchange current density of 0.845 mA·cm-2 with excellent stability, which is superior to most of other reported MoS2 or MoSe2-based catalysts, even without any other strategies such as doping, phase transformation, and integration with other materials.
UR - http://www.scopus.com/inward/record.url?scp=85047881403&partnerID=8YFLogxK
U2 - 10.1021/acsomega.8b00459
DO - 10.1021/acsomega.8b00459
M3 - Article
AN - SCOPUS:85047881403
SN - 2470-1343
VL - 3
SP - 5799
EP - 5807
JO - ACS Omega
JF - ACS Omega
IS - 5
ER -