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PreprintCC BYChemRxiv

Thickness dependent HER activity of individual MXene flakes revealed by SECCM

  • Maryam Alihosseini1
  • Samaneh Salek1
  • Joshua Byers1
  • Guillaume Goubert1
  1. 1Université du Québec à Montréal
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Abstract

MXenes, 2D transition metal carbides, provide unique properties for a large range of applications including electrocatalysis and energy storage. Specifically, Ti 3 C 2 T x , has shown activity for the hydrogen evolution reaction (HER). MXenes are conductive, present a rich surface chemistry and do not contain rare and expensive elements. They are promising for next generation catalyst materials. Here, we study the HER activity of individual single-layer and multilayer Ti 3 C 2 T x flakes, using SECCM and ex situ AFM. Our results show that multilayer flakes have a much larger overpotential, revealing that the reaction proceeds more slowly in the interlayer volume compared to the open basal plane of a single layer. This opens avenues of optimization for MXene catalyst layer formulation that have not been considered before.

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Cite

BibTeXRIS
BibTeX
@misc{alihosseini2026thickness,
  title = {{Thickness dependent HER activity of individual MXene flakes revealed by SECCM}},
  author = {Maryam Alihosseini and Samaneh Salek and Joshua Byers and Guillaume Goubert},
  howpublished = {ChemRxiv},
  year = {2026},
  month = oct,
  doi = {10.26434/chemrxiv-2025-7wpgf/v3},
  url = {https://chemrxiv.org/doi/full/10.26434/chemrxiv-2025-7wpgf/v3},
  note = {CC BY},
}
RIS
TY  - UNPB
TI  - Thickness dependent HER activity of individual MXene flakes revealed by SECCM
AU  - Maryam Alihosseini
AU  - Samaneh Salek
AU  - Joshua Byers
AU  - Guillaume Goubert
PY  - 2026
DA  - 2026/10/06
PB  - ChemRxiv
DO  - 10.26434/chemrxiv-2025-7wpgf/v3
UR  - https://chemrxiv.org/doi/full/10.26434/chemrxiv-2025-7wpgf/v3
AB  - MXenes, 2D transition metal carbides, provide unique properties for a large range of applications including electrocatalysis and energy storage. Specifically, Ti 3 C 2 T x , has shown activity for the hydrogen evolution reaction (HER). MXenes are conductive, present a rich surface chemistry and do not contain rare and expensive elements. They are promising for next generation catalyst materials. Here, we study the HER activity of individual single-layer and multilayer Ti 3 C 2 T x flakes, using SECCM and ex situ AFM. Our results show that multilayer flakes have a much larger overpotential, revealing that the reaction proceeds more slowly in the interlayer volume compared to the open basal plane of a single layer. This opens avenues of optimization for MXene catalyst layer formulation that have not been considered before.
ER  -