期刊
CHEMELECTROCHEM
卷 9, 期 17, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/celc.202200586
关键词
chemical vapour deposition; hydrogen evolution reaction; molybdenum disulfide; scanning electrochemical cell microscopy; thin film materials
资金
- German Research Foundation (Deutsche Forschungsgemeinschaft, DFG) [AN 1570/2-1 (440951282)]
- German Research Foundation (DFG) [SCHL 384/20-1 (406129719)]
- European Union [833408]
- Marie Skodowska-Curie MSCA-ITN, Sentinel [812398]
- Projekt DEAL
- Marie Curie Actions (MSCA) [812398] Funding Source: Marie Curie Actions (MSCA)
The electrocatalytic activity of micrometer-sized MoS2 layers transferred on a glassy carbon surface for the hydrogen evolution reaction (HER) was evaluated using scanning electrochemical cell microscopy (SECCM) in a high-throughput approach. The results showed a high lateral heterogeneity in HER activity over different areas of the MoS2 sheet, and stacked MoS2 layers exhibited similar electrocatalytic activity to single MoS2 sheets.
The electrocatalytic activity concerning the hydrogen evolution reaction (HER) of micrometer-sized MoS2 layers transferred on a glassy carbon surface was evaluated by scanning electrochemical cell microscopy (SECCM) in a high-throughput approach. Multiple areas on single or multiple MoS2 layers were assessed using a hopping mode nanocapillary positioning with a hopping distance of 500 nm and a nanopipette size of around 55 nm. The locally recorded linear sweep voltammograms revealed a high lateral heterogeneity over the MoS2 sheet regarding their HER activity, with currents between -40 and -60 pA recorded at -0.89 V vs. reversible hygrogen electrode over about 4400 different measured areas on the MoS2 sheet. Stacked MoS2 layers did not show different electrocatalytic activity than the single MoS2 sheet, suggesting that the interlayer resistance influences the electrocatalytic activity less than the resistances induced by possible polymer residues or water layers formed between the transferred MoS2 sheet and the glassy carbon electrode.
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