TY - JOUR
T1 - Stable Sulfur-Intercalated 1T′ MoS2 on Graphitic Nanoribbons as Hydrogen Evolution Electrocatalyst
AU - Ekspong, Joakim
AU - Sandström, Robin
AU - Rajukumar, Lakshmy Pulickal
AU - Terrones, Mauricio
AU - Wågberg, Thomas
AU - Gracia-Espino, Eduardo
N1 - Funding Information:
E.G.-E. acknowledges the Ångpanneföreningen (15-391) and Carl Tryggers foundation (CTS-16-161) for the financial support. T.W. acknowledges support from Vetenskapsrådet (2017–04862) Energimyndigheten (45419-1), and Ångpanneföreningen (15-483). Sample imaging was supported by Umeå Core Facility for Electron Microscopy (UCEM) and the Electron Microscopy Center (EMC) at the Department of Materials and Environmental Chemistry (MMK), Stockholm University. The authors acknowledge the vibrational spectroscopy core facility (VISP) at Umeå University for sample routine screening. The theoretical simulations were performed on resources provided by the Swedish National Infrastructure for Computing (SNIC) at the High Performance Computing Center North (HPC2N).
Publisher Copyright:
© 2018 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
PY - 2018/11/14
Y1 - 2018/11/14
N2 - The metastable 1T′ polymorph of molybdenum disulfide (MoS2) has shown excellent catalytic activity toward the hydrogen evolution reaction (HER) in water-splitting applications. Its basal plane exhibits high catalytic activity comparable to the edges in 2H MoS2 and noble metal platinum. However, the production and application of this polymorph are limited by its lower energetic stability compared to the semiconducting 2H MoS2 phase. Here, the production of stable intercalated 1T′ MoS2 nanosheets attached on graphitic nanoribbons is reported. The intercalated 1T′ MoS2 exhibits a stoichiometric S:Mo ratio of 2.3 (±0.1):1 with an expanded interlayer distance of 10 Å caused by a sulfur-rich intercalation agent and is stable at room temperature for several months even after drying. The composition, structure, and catalytic activity toward HER are investigated both experimentally and theoretically. It is concluded that the 1T′ MoS2 phase is stabilized by the intercalated agents, which further improves the basal planes′ catalytic activity toward HER.
AB - The metastable 1T′ polymorph of molybdenum disulfide (MoS2) has shown excellent catalytic activity toward the hydrogen evolution reaction (HER) in water-splitting applications. Its basal plane exhibits high catalytic activity comparable to the edges in 2H MoS2 and noble metal platinum. However, the production and application of this polymorph are limited by its lower energetic stability compared to the semiconducting 2H MoS2 phase. Here, the production of stable intercalated 1T′ MoS2 nanosheets attached on graphitic nanoribbons is reported. The intercalated 1T′ MoS2 exhibits a stoichiometric S:Mo ratio of 2.3 (±0.1):1 with an expanded interlayer distance of 10 Å caused by a sulfur-rich intercalation agent and is stable at room temperature for several months even after drying. The composition, structure, and catalytic activity toward HER are investigated both experimentally and theoretically. It is concluded that the 1T′ MoS2 phase is stabilized by the intercalated agents, which further improves the basal planes′ catalytic activity toward HER.
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U2 - 10.1002/adfm.201802744
DO - 10.1002/adfm.201802744
M3 - Article
AN - SCOPUS:85054188827
SN - 1616-301X
VL - 28
JO - Advanced Functional Materials
JF - Advanced Functional Materials
IS - 46
M1 - 1802744
ER -
