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Improving the HER Activity and Stability of Pt Nanoparticles by Titanium Oxynitride Support

[Image: see text] 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...

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Autores principales: Smiljanić, Milutin, Panić, Stefan, Bele, Marjan, Ruiz-Zepeda, Francisco, Pavko, Luka, Gašparič, Lea, Kokalj, Anton, Gaberšček, Miran, Hodnik, Nejc
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Chemical Society 2022
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9594320/
https://www.ncbi.nlm.nih.gov/pubmed/36313525
http://dx.doi.org/10.1021/acscatal.2c03214
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author Smiljanić, Milutin
Panić, Stefan
Bele, Marjan
Ruiz-Zepeda, Francisco
Pavko, Luka
Gašparič, Lea
Kokalj, Anton
Gaberšček, Miran
Hodnik, Nejc
author_facet Smiljanić, Milutin
Panić, Stefan
Bele, Marjan
Ruiz-Zepeda, Francisco
Pavko, Luka
Gašparič, Lea
Kokalj, Anton
Gaberšček, Miran
Hodnik, Nejc
author_sort Smiljanić, Milutin
collection PubMed
description [Image: see text] 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.
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spelling pubmed-95943202022-10-26 Improving the HER Activity and Stability of Pt Nanoparticles by Titanium Oxynitride Support Smiljanić, Milutin Panić, Stefan Bele, Marjan Ruiz-Zepeda, Francisco Pavko, Luka Gašparič, Lea Kokalj, Anton Gaberšček, Miran Hodnik, Nejc ACS Catal [Image: see text] 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. American Chemical Society 2022-10-12 2022-10-21 /pmc/articles/PMC9594320/ /pubmed/36313525 http://dx.doi.org/10.1021/acscatal.2c03214 Text en © 2022 The Authors. Published by American Chemical Society https://creativecommons.org/licenses/by/4.0/Permits the broadest form of re-use including for commercial purposes, provided that author attribution and integrity are maintained (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Smiljanić, Milutin
Panić, Stefan
Bele, Marjan
Ruiz-Zepeda, Francisco
Pavko, Luka
Gašparič, Lea
Kokalj, Anton
Gaberšček, Miran
Hodnik, Nejc
Improving the HER Activity and Stability of Pt Nanoparticles by Titanium Oxynitride Support
title Improving the HER Activity and Stability of Pt Nanoparticles by Titanium Oxynitride Support
title_full Improving the HER Activity and Stability of Pt Nanoparticles by Titanium Oxynitride Support
title_fullStr Improving the HER Activity and Stability of Pt Nanoparticles by Titanium Oxynitride Support
title_full_unstemmed Improving the HER Activity and Stability of Pt Nanoparticles by Titanium Oxynitride Support
title_short Improving the HER Activity and Stability of Pt Nanoparticles by Titanium Oxynitride Support
title_sort improving the her activity and stability of pt nanoparticles by titanium oxynitride support
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9594320/
https://www.ncbi.nlm.nih.gov/pubmed/36313525
http://dx.doi.org/10.1021/acscatal.2c03214
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