20.500.12556/RUL-144309 Improving the HER activity and stability of Pt nanoparticles by titanium oxynitride support 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. hydrogen evolution reaction platinum nanoparticles titanium oxynitride strong metal−support interaction XPS DFT catalysts evolution reactions metal nanoparticles nanoparticles platinum elektrokemija elektroliza vodik nanodelci platina true false true Angleški jezik Slovenski jezik Članek v reviji 2023-02-14 08:22:10 2023-02-14 08:22:11 2023-02-22 11:07:54 0000-00-00 00:00:00 2022 0 0 Str. 13021–13033 iss. 20 Vol. 12 Oct. 2022 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 544.5/.6 2155-5435 10.1021/acscatal.2c03214 128119555 acscatal.2c03214.pdf acscatal.2c03214.pdf 1 CFF43012ED89ECC08157BB8F4DB8080A d0e1e82eca88531ec01484355269bbc17d1b56a71094b3b80ad925514d491034 82893f30-ac38-11ed-9c94-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=166549 https://pubs.acs.org/doi/10.1021/acscatal.2c03214 0 37ab4938-ac38-11ed-9c94-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=166547 Fakulteta za kemijo in kemijsko tehnologijo 0 0 0