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MoS2 stacking matters: 3R polytype significantly outperforms 2H MoS2 for the hydrogen evolution reaction
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SYSNO ASEP 0545897 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title MoS2 stacking matters: 3R polytype significantly outperforms 2H MoS2 for the hydrogen evolution reaction Author(s) Luxa, J. (CZ)
Spejchalova, L. (CZ)
Jakubec, Ivo (UACH-T) SAI, RID, ORCID
Sofer, Z. (CZ)Number of authors 4 Source Title Nanoscale. - : Royal Society of Chemistry - ISSN 2040-3364
Roč. 13, č. 46 (2021), s. 19391-19398Number of pages 8 s. Language eng - English Country GB - United Kingdom Keywords transition-metal dichalcogenides ; phase ; catalyst ; sites Subject RIV CA - Inorganic Chemistry OECD category Inorganic and nuclear chemistry Method of publishing Limited access Institutional support UACH-T - RVO:61388980 UT WOS 000696590300001 EID SCOPUS 85120730282 DOI 10.1039/d1nr03284d Annotation Transition metal dichalcogenides (TMDs) are an intriguing family of materials with large application potential in a variety of scientific fields ranging from electronics to electrocatalysis. Within this group of materials, MoS2 has been attracting a lot of scientific attention due to its chemical and physical properties. In this report, we studied the exfoliation of the largely unexplored 3R MoS2 polytype prepared by high-temperature, high-pressure synthesis. Bulk as well as sodium naphthalenide exfoliated materials were studied in terms of their quality and performance for the hydrogen evolution reaction (HER). The HER performance was benchmarked versus the commonly available 2H polytype. The reported results show that the 3R polytype is more suitable for the conversion of MoS2 into the metallic 1T phase, which was attributed to surface oxidation occurring in the 2H polytype. Higher content of the 1T phase then resulted in an overall lower overpotential of0.25 V vs. RHE for the 3R polytype compared with the overpotential of0.30 V for the 2H polytype. These results show that the 3R polytype might serve as a better starting point for the synthesis of highly active chemically exfoliated MoS2 catalysts for hydrogen evolution. Workplace Institute of Inorganic Chemistry Contact Jana Kroneislová, krone@iic.cas.cz, Tel.: 311 236 931 Year of Publishing 2022 Electronic address https://doi.org/10.1039/D1NR03284D
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