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

Smiljanić, Milutin (avtor), Bele, Marjan (avtor), Pavko, Luka (avtor), Hrnjić, Armin (avtor), Ruiz-Zepeda, Francisco (avtor), Bijelić, Lazar (avtor), Kamšek, Ana Rebeka (avtor), Nuhanović, Mejrema (avtor), Marsel, Aleš (avtor), Gašparič, Lea (avtor), Kokalj, Anton (avtor), Hodnik, Nejc (avtor)

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 the 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 the 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.

• Jezik: Angleški jezik
• Ključne besede: hydrogen evolution reaction, alkaline electrolyte, ruthenium, titanium oxynitride, metal–support interaction, DFT
• Vrsta gradiva: Članek v reviji
• Tipologija: 1.01 - Izvirni znanstveni članek
• Organizacija: FKKT - Fakulteta za kemijo in kemijsko tehnologijo
• Status publikacije: Objavljeno
• Različica publikacije: Objavljena publikacija
• Leto izida: 2025
• Št. strani: 15 str.
• Številčenje: Vol. 517, art. 164204
• PID: 20.500.12556/RUL-182045
• UDK: 66
• ISSN pri članku: 1873-3212
• DOI: 10.1016/j.cej.2025.164204
• COBISS.SI-ID: 241180419
• Datum objave v RUL: 23.04.2026

Gradivo je del revije

• Naslov: Chemical engineering journal
• Založnik: Elsevier
• ISSN: 1873-3212
• COBISS.SI-ID: 23123973

Licence

• Licenca: CC BY 4.0, Creative Commons Priznanje avtorstva 4.0 Mednarodna
• Povezava: http://creativecommons.org/licenses/by/4.0/deed.sl
• Opis: To je standardna licenca Creative Commons, ki daje uporabnikom največ možnosti za nadaljnjo uporabo dela, pri čemer morajo navesti avtorja.

Sekundarni jezik

• Jezik: Slovenski jezik
• Ključne besede: kemijska tehnologija, reakcije izločanja vodika, HER, kovine, elektrokemija