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

Wolff S, Grochowska K, Makhoul E, Gumieniak J, Kramek A, Załęski K, Coy E, Crisp R, Bechelany M, Wójcik NA, Siuzdak K (2026)

Publication Type: Journal article

Publication year: 2026

Journal

International Journal of Hydrogen Energy Elsevier

Book Volume: 240

Article Number: 155494

DOI: 10.1016/j.ijhydene.2026.155494

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−1cm−2.

Authors with CRIS profile

Ryan Crisp Lehrstuhl für Chemistry of thin film materials

Involved external institutions

The Szewalski Institute of Fluid-Flow Machinery Polish Academy of Sciences PL Poland (PL) Institut Européen des Membranes (IEM) FR France (FR) Politechnika Rzeszowska PL Poland (PL) Adam Mickiewicz University / Uniwersytet im. Adama Mickiewicza w Poznaniu (UAM) PL Poland (PL) Gdańsk University of Technology (GUT) / Politechnika Gdańska PL Poland (PL)

How to cite

APA:

Wolff, S., Grochowska, K., Makhoul, E., Gumieniak, J., Kramek, A., Załęski, K.,... Siuzdak, K. (2026). Atomic layer deposition of Pd and SnO2 on TiO2 nanotubes: A route to efficient hydrogen evolution. International Journal of Hydrogen Energy, 240. https://doi.org/10.1016/j.ijhydene.2026.155494

MLA:

Wolff, Stefania, et al. "Atomic layer deposition of Pd and SnO2 on TiO2 nanotubes: A route to efficient hydrogen evolution." International Journal of Hydrogen Energy 240 (2026).

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