Cited by 20Electrocatalysts for Energy ConversionHydrogen Storage and MaterialsCatalytic Processes in Materials Science

Titanium oxynitride-supported Ru nanoparticles as exceptional electrocatalysts for alkaline hydrogen evolution reaction

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Smiljanić, M., Bele, M., Pavko, L., Hrnjić, A., Ruiz-Zepeda, F., Bijelić, L., Kamšek, A.R., Nuhanović, M. +4 more·2025·Chemical Engineering Journal

Abstract

We present a novel and highly efficient catalyst for the hydrogen evolution reaction (HER) consisting of low-loaded Ru nanoparticles dispersed on a titanium oxynitride-graphene oxide (Ru/TiON-C) support. Ru/TiON-C with a Ru loading of only 6 wt.% is significantly more active for HER in alkaline media than Ru/C analog. More importantly, Ru/TiON-C outperforms the Pt/C benchmark both intrinsically (2.5 times higher turnover frequency) and in terms of metal utilization (4.5 times higher mass activity). The exceptional HER activity of Ru/TiON-C is related to the metal-support interaction (MSI) induced by TiON, which was experimentally evidenced by X-ray photoelectron spectroscopy and further investigated by density functional theory calculations. It can be proposed that MSI enhances water dissociation properties and tunes hydrogen adsorption energy at Ru active sites, while stability is provided by strong anchoring of the Ru nanoparticles on the TiON. The presented strategy to develop advanced electrocatalytic composites can be extended to other metallic active sites and electrochemical reactions.

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Crossref · 10.1016/j.cej.2025.164204

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  • Ruthenium is a compelling alternative to Pt for hydrogen production due to its relatively lower cost, favorable hydrogen adsorption energy, and well-established catalytic performance.

    “ruthenium (Ru) has emerged as a compelling alternative to Pt for hydrogen production due to its relatively lower cost, favorable hydrogen adsorption energy, and well-established catalytic performance [8–12].”

    From Efficient Hydrogen Evolution Catalysis Enabled by Ru Nanoparticles on Few‐Layer Black Phosphorus/Graphene Heterostructured Aerogels (2026) · cites this paper as [11]

    The passage labeled Abstract (p. 2) describes Ru as a promising HER catalyst and says its average price was about 25% of Pt’s over the preceding decade. But it says Ru overbinds hydrogen relative to Pt and that this must be addressed; it does not support favorable hydrogen adsorption energy as an unqualified property of Ru. The Abstract (p. 1) instead attributes tuned hydrogen adsorption energy to the specific Ru/TiON-C catalyst. (LLM, conf=0.87)

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Research works printed but not linked: 2

  1. [39][39] A. Loncar, L. Moriau, K. Stojanovski, F. Ruiz-Zepeda, P. Jovanovic, M. Bele, M. Gaberscek, N. Hodnik, Ir/TiON x /C high-performance oxygen evolution reaction nanocomposite electrocatalysts in acidic media: synthesis, characterization and electrochemical benchmarking protocol, Journal of Physics: Energy 2 (2020) 02LT01, https://doi.org/10.1088/2515-7655/ab69a2. - · DOI
  2. [68][68] [J. Lin, X. Wang, Z. Zhao, D. Chen, R. Liu, Z. Ye, B. Lu, Y. Hou, J. Lu, Design of pHuniversal electrocatalysts for hydrogen evolution reaction, Carbon Energy (2024) e555.](http://refhub.elsevier.com/S1385-8947(25)05039-9/h0340) -

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Authors
Smiljanić, M., Bele, M., Pavko, L., Hrnjić, A., Ruiz-Zepeda, F., Bijelić, L., Kamšek, A. R., Nuhanović, M., Marsel, A., Gašparič, L., Kokalj, A., & Hodnik, N.
Affiliations
  • National Institute of Chemistry (SI)
  • University of Nova Gorica (SI)
  • University of Ljubljana (SI)
  • Jožef Stefan Institute (SI)
Corresponding author
  • Smiljanić, M.
  • Hodnik, N.
Venue
Chemical Engineering Journal
Publisher
Elsevier BV
Published
2025-08
Volume
517
Pages
164204
ISSN
1385-8947 (ISSN-L)
OpenAlex
W4410813354
Cited by
18
References
76
Citations by year
2026: 16 · 2025: 2
FWCI
2.49
Type
journal article
Language
en
Open access
Locations
  • Chemical Engineering Journal (publishedVersion, cc-by)
  • SSRN Electronic Journal (acceptedVersion)
  • DiRROS repository (University of Maribor) (submittedVersion, cc-by)
  • Repository of the University of Ljubljana (University of Ljubljana) (submittedVersion, cc-by)
Funders
  • The Slovenian Research and Innovation Agency (J7-50227, J7-4637, N2-0385, I0-0003, N2-0155, J2-50055, P2-0393, NC-0016, J7-4636, N2-0248, GC-0001)
  • European Commission
  • Government of the Republic of Slovenia
  • European Research Council (852208, 123STABLE)
  • North Atlantic Treaty Organization
Topics
  • Physical Sciences › Energy › Renewable Energy, Sustainability and the Environment › Electrocatalysts for Energy Conversion
  • Physical Sciences › Materials Science › Materials Chemistry › Hydrogen Storage and Materials
  • Physical Sciences › Materials Science › Materials Chemistry › Catalytic Processes in Materials Science
Keywords
hydrogen evolution reaction, ruthenium nanoparticles, titanium oxynitride, graphene oxide, metal-support interaction, alkaline electrocatalysis, low metal loading, water dissociation, hydrogen adsorption energy, catalyst stability, mass activity

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