Improving the HER Activity and Stability of Pt Nanoparticles by Titanium Oxynitride Support
2022
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Authors
Smiljanić, MilutinPanić, Stefan
Bele, Marjan
Ruiz-Zepeda, Francisco
Pavko, Luka
Gašparič, Lea
Kokalj, Anton
Gaberšček, Miran
Hodnik, Nejc
Article (Published version)
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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 (TiONx) dispersed over reduced graphene oxide nanoribbons. Characterization of the Pt/TiONx composite revealed the presence of small Pt particles with diameters between 2 and 3 nm, which are well dispersed over the TiONx support. The Pt/TiONx 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 TiONx support and grafted Pt nanoparticles. SMSI between TiONx and Pt was evidenced by X-ray photoelectron spectroscopy (XPS) through a shi...ft 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 TiONx 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.
Keywords:
DFT / hydrogen evolution reaction / platinum nanoparticles / strong metal-support interaction / titanium oxynitride / XPSSource:
ACS Catalysis, 2022, 12, 20, 13021-13033Funding / projects:
- Slovenian Ministry of Education Science and Sport & EU -European Regional Development Fund [project Raziskovalci-2.1-KI-952007]
- Slovenian Research Agency through the research programs/ projects [I0-0003 and P2-0393, NC-0007, NC-0016, N2-0248, and N2-0155]
- European Research Council (ERC) [Grant 123STABLE (Grant agreement ID: 852208)]
- NATO Science for Peace and Security Program [Grant G5729]
Institution/Community
VinčaTY - JOUR AU - Smiljanić, Milutin AU - Panić, Stefan AU - Bele, Marjan AU - Ruiz-Zepeda, Francisco AU - Pavko, Luka AU - Gašparič, Lea AU - Kokalj, Anton AU - Gaberšček, Miran AU - Hodnik, Nejc PY - 2022 UR - https://vinar.vin.bg.ac.rs/handle/123456789/10503 AB - 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 (TiONx) dispersed over reduced graphene oxide nanoribbons. Characterization of the Pt/TiONx composite revealed the presence of small Pt particles with diameters between 2 and 3 nm, which are well dispersed over the TiONx support. The Pt/TiONx 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 TiONx support and grafted Pt nanoparticles. SMSI between TiONx 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 TiONx 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. T2 - ACS Catalysis T1 - Improving the HER Activity and Stability of Pt Nanoparticles by Titanium Oxynitride Support VL - 12 IS - 20 SP - 13021 EP - 13033 DO - 10.1021/acscatal.2c03214 ER -
@article{ author = "Smiljanić, Milutin and Panić, Stefan and Bele, Marjan and Ruiz-Zepeda, Francisco and Pavko, Luka and Gašparič, Lea and Kokalj, Anton and Gaberšček, Miran and Hodnik, Nejc", year = "2022", abstract = "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 (TiONx) dispersed over reduced graphene oxide nanoribbons. Characterization of the Pt/TiONx composite revealed the presence of small Pt particles with diameters between 2 and 3 nm, which are well dispersed over the TiONx support. The Pt/TiONx 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 TiONx support and grafted Pt nanoparticles. SMSI between TiONx 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 TiONx 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.", journal = "ACS Catalysis", title = "Improving the HER Activity and Stability of Pt Nanoparticles by Titanium Oxynitride Support", volume = "12", number = "20", pages = "13021-13033", doi = "10.1021/acscatal.2c03214" }
Smiljanić, M., Panić, S., Bele, M., Ruiz-Zepeda, F., Pavko, L., Gašparič, L., Kokalj, A., Gaberšček, M.,& Hodnik, N.. (2022). Improving the HER Activity and Stability of Pt Nanoparticles by Titanium Oxynitride Support. in ACS Catalysis, 12(20), 13021-13033. https://doi.org/10.1021/acscatal.2c03214
Smiljanić M, Panić S, Bele M, Ruiz-Zepeda F, Pavko L, Gašparič L, Kokalj A, Gaberšček M, Hodnik N. Improving the HER Activity and Stability of Pt Nanoparticles by Titanium Oxynitride Support. in ACS Catalysis. 2022;12(20):13021-13033. doi:10.1021/acscatal.2c03214 .
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" in ACS Catalysis, 12, no. 20 (2022):13021-13033, https://doi.org/10.1021/acscatal.2c03214 . .