Local electrochemical activity of transition metal dichalcogenides and their heterojunctions on 3D-printed nanocarbon surfaces

Katarina A. Novčić, Christian Iffelsberger, Siowwoon Ng, Martin Pumera

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

Transition metal dichalcogenides (TMDs) have shown to be promising catalysts for the electrochemical hydrogen evolution reaction (HER) and 3D-printing enables fast prototyping and manufacturing of water splitting devices. However, the merging of TMDs with complex 3D-printed surfaces and nanostructures as well as their localized characterization remains challenging. In this work, electrodeposition of MoS2 and WS2 and their heterojunctions are used to modify thermally activated 3D-printed nanocarbon structures. Their electrochemical performance for the HER is investigated macroscopically by linear sweep voltammetry and microscopically by scanning electrochemical microscopy. This study demonstrates different local HER active sites of MoS2 and WS2 within the 3D-printed nanocarbon structure that are not solely located at the outer surface, but also in the interior up to ∼150 μm for MoS2 and ∼300 μm for WS2. This journal is

Original languageEnglish
Pages (from-to)5324-5332
Number of pages9
JournalNanoscale
Volume13
Issue number10
DOIs
Publication statusPublished - 2021 Mar 14

Bibliographical note

Funding Information:
M. P. acknowledges the financial support from the Grand Agency of Czech Republic (GACR EXPO: 19-26896X). K. A. N., C. I. and S. N. acknowledge the support from the CzechNanoLab Research Infrastructure (ID LM2018110, MEYS CR) for providing the sample preparation and material characterization facilities.

Publisher Copyright:
© The Royal Society of Chemistry.

All Science Journal Classification (ASJC) codes

  • Materials Science(all)

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