Atomic layer deposition of Pd and SnO₂ on TiO₂ nanotubes: a route to efficient hydrogen evolution

Abstract

Advancing efficient hydrogen production requires new electrocatalysts with tenable activity and stability. Here, titanium dioxide nanotubes (TNTs) are engineered via atomic layer deposition (ALD) of palladium (Pd) and tin oxide (SnO₂) to unlock synergistic effects for hydrogen evolution reaction (HER) enhancement. The study highlights how controlled deposition of Pd and SnO₂ influences the nanotubes morphology, structure, and electrochemical properties. The Pd/SnO₂ co-modified TNTs showed synergistic enhancement for HER, achieving overpotential of approximately 160 mV at a current density of 10 mAcm⁻² and a low Tafel slope of about 52 mVdec⁻¹ for the best-performing sample and excellent stability over 48 h at 10 mAcm⁻². Impedance spectroscopy confirms superior charge transfer in these heterostructures compared to bare TNTs and singly modified electrodes. Moreover, the Faradaic efficiency calculated for the best-performing sample is 98 ± 2 %, while H₂ production rate equals 183 ± 2 μmolh⁻¹cm².

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BibTeX RIS

BibTeX

@article{wolff2026atomic,
  title = {{Atomic layer deposition of Pd and SnO₂ on TiO₂ nanotubes: a route to efficient hydrogen evolution}},
  author = {Stefania Wolff and Katarzyna Grochowska and Elissa Makhoul and Justyna Gumieniak and Agnieszka Kramek and Karol Załęski and Emerson Coy and Ryan Crisp and Mikhael Bechelany and Natalia Anna Wójcik and Katarzyna Siuzdak},
  journal = {International Journal of Hydrogen Energy},
  year = {2026},
  month = may,
  doi = {10.1016/j.ijhydene.2026.155494},
  url = {https://hal.science/hal-05659545v1},
  note = {CC BY-SA 4.0},
}

RIS

TY  - JOUR
TI  - Atomic layer deposition of Pd and SnO₂ on TiO₂ nanotubes: a route to efficient hydrogen evolution
AU  - Stefania Wolff
AU  - Katarzyna Grochowska
AU  - Elissa Makhoul
AU  - Justyna Gumieniak
AU  - Agnieszka Kramek
AU  - Karol Załęski
AU  - Emerson Coy
AU  - Ryan Crisp
AU  - Mikhael Bechelany
AU  - Natalia Anna Wójcik
AU  - Katarzyna Siuzdak
PY  - 2026
DA  - 2026/05/13
JO  - International Journal of Hydrogen Energy
DO  - 10.1016/j.ijhydene.2026.155494
UR  - https://hal.science/hal-05659545v1
AB  - Advancing efficient hydrogen production requires new electrocatalysts with tenable activity and stability. Here, titanium dioxide nanotubes (TNTs) are engineered via atomic layer deposition (ALD) of palladium (Pd) and tin oxide (SnO₂) to unlock synergistic effects for hydrogen evolution reaction (HER) enhancement. The study highlights how controlled deposition of Pd and SnO₂ influences the nanotubes morphology, structure, and electrochemical properties. The Pd/SnO₂ co-modified TNTs showed synergistic enhancement for HER, achieving overpotential of approximately 160 mV at a current density of 10 mAcm⁻² and a low Tafel slope of about 52 mVdec⁻¹ for the best-performing sample and excellent stability over 48 h at 10 mAcm⁻². Impedance spectroscopy confirms superior charge transfer in these heterostructures compared to bare TNTs and singly modified electrodes. Moreover, the Faradaic efficiency calculated for the best-performing sample is 98 ± 2 %, while H₂ production rate equals 183 ± 2 μmolh⁻¹cm².
SN  - 0360-3199
SN  - 1879-3487
ER  -

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