Milutin Smiljanić (Avtor), Stefan R. Panić (Avtor), Marjan Bele (Avtor), Francisco Ruiz-Zepeda (Avtor), Luka Pavko (Avtor), Lea Gašparič (Avtor), Anton Kokalj (Avtor), Miran Gaberšček (Avtor), Nejc Hodnik (Avtor)

Povzetek

Water electrolysis powered by renewables is regarded as the feasible route for the production of hydrogen, obtained at the cathode side through electrochemical hydrogen evolution reaction (HER). Herein, we present a rational strategy to improve the overall HER catalytic performance of Pt, which is known as the best monometallic catalyst for this reaction, by supporting it on a conductive titanium oxynitride (TiON$_x$) dispersed over reduced graphene oxide nanoribbons. Characterization of the Pt/TiON$_x$ composite revealed the presence of small Pt particles with diameters between 2 and 3 nm, which are well dispersed over the TiON$_x$ support. The Pt/TiON$_x$ nanocomposite exhibited improved HER activity and stability with respect to the Pt/C benchmark in an acid electrolyte, which was ascribed to the strong metal−support interaction (SMSI) triggered between the TiON$_x$ support and grafted Pt nanoparticles. SMSI between TiON$_x$ and Pt was evidenced by X-ray photoelectron spectroscopy (XPS) through a shift of the binding energies of the characteristic Pt 4f photoelectron lines with respect to Pt/C. Density functional theory (DFT) calculations confirmed the strong interaction between Pt nanoparticles and the TiON$_x$ support. This strong interaction improves the stability of Pt nanoparticles and weakens the binding of chemisorbed H atoms thereon. Both of these effects may result in enhanced HER activity.

Ključne besede

elektrokemija;elektroliza;vodik;nanodelci;platina;

Podatki

Jezik: Angleški jezik
Leto izida:
Tipologija: 1.01 - Izvirni znanstveni članek
Organizacija: KI - Kemijski inštitut
Založnik: ACS Publications
UDK: 544.5/.6
COBISS: 128119555 Povezava se bo odprla v novem oknu
ISSN: 2155-5435
Št. ogledov: 40
Št. prenosov: 11
Ocena: 0 (0 glasov)
Metapodatki: JSON JSON-RDF JSON-LD TURTLE N-TRIPLES XML RDFA MICRODATA DC-XML DC-RDF RDF

Ostali podatki

Sekundarni jezik: Slovenski jezik
Sekundarne ključne besede: elektrokemija;elektroliza;vodik;nanodelci;platina;
Vrsta dela (COBISS): Članek v reviji
Komentar vira: Nasl. z nasl. zaslona; Opis vira z dne 4. 11. 2022;
Strani: str. 13021–13033
Letnik: ǂVol. ǂ12
Zvezek: ǂiss. ǂ20
Čas izdaje: 12 Oct. 2022
DOI: 10.1021/acscatal.2c03214
ID: 26315105