Dobrota, Ana S.

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Authority KeyName Variants
orcid::0000-0001-6200-8612
  • Dobrota, Ana S. (2)
  • Dobrota, Ana (1)
Projects
Lithium-ion batteries and fuel cells - research and development Bilateral cooperation project between the Republic of Serbia and the Federal Republic of Germany (project years 2020–2021, No. 22), as well as the ERC and DFG.
Carl Tryggers Foundation for Scientific Research Strengthening of the MagBioVin Research and Innovation Team for Development of Novel Approaches for Tumour Therapy based on Nanostructured Materials
Development, characterization and application nanostructured and composite electrocatalysts and interactive supports for fuel cells and water electrolysis Ministry of Education, Science and Technological Development, Republic of Serbia, Grant no. 451-03-68/2020-14/200053 (University of Belgrade, Institute for Multidisciplinary Research)
Ministry of Education, Science and Technological Development, Republic of Serbia, Grant no. 451-03-68/2020-14/200146 (University of Belgrade, Faculty of Physical Chemistry) Advanced technologies for monitoring and environmental protection from chemical pollutants and radiation burden
Synthesis, processing and characterization of nanostructured materials for application in the field of energy, mechanical engineering, environmental protection and biomedicine Fabrication and characterization of nano-photonic functional structrues in biomedicine and informatics
NATO [EAP.SFPP 984925] NATO Project [EAP.SFPP 984925]
Serbian Academy of Sciences and Arts [F-190] Swedish Research Council [2014-5993]
The computations and data handling were enabled by resources provided by the Swedish National Infrastructure for Computing (SNIC) at National Supercomputer Centre (NSC) at Link¨oping University, partially funded by the Swedish Research Council through grant agreement No. 2018-05973. The networking support from COST action MP1407 is greatly appreciated.

Author's Bibliography

High-performance hydrogen evolution electrocatalysis using proton-intercalated TiO2 nanotube arrays as interactive supports for Ir nanoparticles

Lačnjevac, Uroš; Vasilić, Rastko; Dobrota, Ana; Đurđić, Slađana Z.; Tomanec, Ondřej; Zbořil, Radek; Mohajernia, Shiva; Nguyen, Nhat Truong; Skorodumova, Natalia; Manojlović, Dragan D.; Elezović, Nevenka; Pašti, Igor; Schmuki, Patrik

(Royal Society of Chemistry, 2020)

TY  - JOUR
AU  - Lačnjevac, Uroš
AU  - Vasilić, Rastko
AU  - Dobrota, Ana
AU  - Đurđić, Slađana Z.
AU  - Tomanec, Ondřej
AU  - Zbořil, Radek
AU  - Mohajernia, Shiva
AU  - Nguyen, Nhat Truong
AU  - Skorodumova, Natalia
AU  - Manojlović, Dragan D.
AU  - Elezović, Nevenka
AU  - Pašti, Igor
AU  - Schmuki, Patrik
PY  - 2020
UR  - http://cherry.chem.bg.ac.rs/handle/123456789/4288
AB  - Developing ultraefficient electrocatalytic materials for the hydrogen evolution reaction (HER) with low content of expensive platinum group metals (PGMs) via low-energy-input procedures is the key to the successful commercialization of green water electrolysis technologies for sustainable production of high-purity hydrogen. In this study, we report a facile room-temperature synthesis of ultrafine metallic Ir nanoparticles on conductive, proton-intercalated TiO2 nanotube (H-TNT) arrays via galvanic displacement. A series of experiments demonstrate that a controlled transformation of the H-TNT surface microstructure from neat open-top tubes to disordered nanostripe bundles (“nanograss”) is highly beneficial for providing an abundance of exposed Ir active sites. Consequently, for nanograss-engineered composites, outstanding HER activity metrics are achieved even at very low Ir(III) precursor concentrations. An optimum Ir@TNT cathode loaded with 5.7 μgIr cm−2 exhibits an overpotential of −63 mV at −100 mA cm−2 and a mass activity of 34 A mgIr−1 at −80 mV under acidic conditions, along with excellent catalytic durability and structural integrity. Density functional theory (DFT) simulations reveal that the hydrogen-rich TiO2 surface not only stabilizes the deposited Ir and weakens its H binding strength to a moderate intensity, but also actively takes part in the HER mechanism by refreshing the Ir catalytic sites near the Ir|H–TiO2 interface, thus substantially promoting H2 generation. The comprehensive characterization combined with theory provides an in-depth understanding of the electrocatalytic behavior of H-TNT supported PGM nanoparticles and demonstrates their high potential as competitive electrocatalyst systems for the HER.
PB  - Royal Society of Chemistry
T2  - Journal of Materials Chemistry A
T1  - High-performance hydrogen evolution electrocatalysis using proton-intercalated TiO2 nanotube arrays as interactive supports for Ir nanoparticles
VL  - 8
IS  - 43
SP  - 22773
EP  - 22790
DO  - 10.1039/D0TA07492F
ER  - 
@article{
author = "Lačnjevac, Uroš and Vasilić, Rastko and Dobrota, Ana and Đurđić, Slađana Z. and Tomanec, Ondřej and Zbořil, Radek and Mohajernia, Shiva and Nguyen, Nhat Truong and Skorodumova, Natalia and Manojlović, Dragan D. and Elezović, Nevenka and Pašti, Igor and Schmuki, Patrik",
year = "2020",
url = "http://cherry.chem.bg.ac.rs/handle/123456789/4288",
abstract = "Developing ultraefficient electrocatalytic materials for the hydrogen evolution reaction (HER) with low content of expensive platinum group metals (PGMs) via low-energy-input procedures is the key to the successful commercialization of green water electrolysis technologies for sustainable production of high-purity hydrogen. In this study, we report a facile room-temperature synthesis of ultrafine metallic Ir nanoparticles on conductive, proton-intercalated TiO2 nanotube (H-TNT) arrays via galvanic displacement. A series of experiments demonstrate that a controlled transformation of the H-TNT surface microstructure from neat open-top tubes to disordered nanostripe bundles (“nanograss”) is highly beneficial for providing an abundance of exposed Ir active sites. Consequently, for nanograss-engineered composites, outstanding HER activity metrics are achieved even at very low Ir(III) precursor concentrations. An optimum Ir@TNT cathode loaded with 5.7 μgIr cm−2 exhibits an overpotential of −63 mV at −100 mA cm−2 and a mass activity of 34 A mgIr−1 at −80 mV under acidic conditions, along with excellent catalytic durability and structural integrity. Density functional theory (DFT) simulations reveal that the hydrogen-rich TiO2 surface not only stabilizes the deposited Ir and weakens its H binding strength to a moderate intensity, but also actively takes part in the HER mechanism by refreshing the Ir catalytic sites near the Ir|H–TiO2 interface, thus substantially promoting H2 generation. The comprehensive characterization combined with theory provides an in-depth understanding of the electrocatalytic behavior of H-TNT supported PGM nanoparticles and demonstrates their high potential as competitive electrocatalyst systems for the HER.",
publisher = "Royal Society of Chemistry",
journal = "Journal of Materials Chemistry A",
title = "High-performance hydrogen evolution electrocatalysis using proton-intercalated TiO2 nanotube arrays as interactive supports for Ir nanoparticles",
volume = "8",
number = "43",
pages = "22773-22790",
doi = "10.1039/D0TA07492F"
}
Lačnjevac, U., Vasilić, R., Dobrota, A., Đurđić, S. Z., Tomanec, O., Zbořil, R., Mohajernia, S., Nguyen, N. T., Skorodumova, N., Manojlović, D. D., Elezović, N., Pašti, I.,& Schmuki, P. (2020). High-performance hydrogen evolution electrocatalysis using proton-intercalated TiO2 nanotube arrays as interactive supports for Ir nanoparticles.
Journal of Materials Chemistry A
Royal Society of Chemistry., 8(43), 22773-22790.
https://doi.org/10.1039/D0TA07492F
Lačnjevac U, Vasilić R, Dobrota A, Đurđić SZ, Tomanec O, Zbořil R, Mohajernia S, Nguyen NT, Skorodumova N, Manojlović DD, Elezović N, Pašti I, Schmuki P. High-performance hydrogen evolution electrocatalysis using proton-intercalated TiO2 nanotube arrays as interactive supports for Ir nanoparticles. Journal of Materials Chemistry A. 2020;8(43):22773-22790
Lačnjevac Uroš, Vasilić Rastko, Dobrota Ana, Đurđić Slađana Z., Tomanec Ondřej, Zbořil Radek, Mohajernia Shiva, Nguyen Nhat Truong, Skorodumova Natalia, Manojlović Dragan D., Elezović Nevenka, Pašti Igor, Schmuki Patrik, "High-performance hydrogen evolution electrocatalysis using proton-intercalated TiO2 nanotube arrays as interactive supports for Ir nanoparticles" Journal of Materials Chemistry A, 8, no. 43 (2020):22773-22790,
https://doi.org/10.1039/D0TA07492F .
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A study of ordered mesoporous carbon doped with Co and Ni as a catalyst of oxygen reduction reaction in both alkaline and acidic media

Gavrilov, Nemanja; Momcilovic, Milan; Dobrota, Ana S.; Stanković, Dalibor; Jokić, Bojan; Babić, Biljana; Skorodumova, Natalia V.; Mentus, Slavko V.; Pasti, Igor A.

(Elsevier Science Sa, Lausanne, 2018)

TY  - JOUR
AU  - Gavrilov, Nemanja
AU  - Momcilovic, Milan
AU  - Dobrota, Ana S.
AU  - Stanković, Dalibor
AU  - Jokić, Bojan
AU  - Babić, Biljana
AU  - Skorodumova, Natalia V.
AU  - Mentus, Slavko V.
AU  - Pasti, Igor A.
PY  - 2018
UR  - http://cherry.chem.bg.ac.rs/handle/123456789/2088
AB  - The incorporation of trace amounts ( lt  0.2%) of Co and Ni noticeably enhanced the catalytic activity of nitrogen free ordered mesoporous carbon (OMC) towards oxygen reduction reaction (ORR). (Co,Ni)-doped OMCs were characterized by N-2-adsorption measurements, X-ray powder diffraction, field emission scanning electron microscopy and Raman spectroscopy methods, and their ORR activity was estimated by voltammetry on rotating disk electrode in acidic and alkaline media. (Co,Ni)-doped OMCs show modest activities in acidic media, while the catalytic activity in alkaline media is rather high. The measured activities are compared to the Pt-based and Pt-free ORR catalysts reported in the literature. The number of electrons consumed per O-2 in metal-doped OMCs was found to vary between 2 and 4, which is advantageous in comparison to metal-free OMC. Also, the mass activities of metal-doped OMCs were found to be up to 2.5 times higher compared to that of metal-free OMC. We suggest that the ORR activity is governed by a balance between (i) textural properties, which determine the electrochemically accessible surface of the catalyst and which are influenced by the addition of a metal precursor, and (ii) novel active sites formed upon the introduction of metals into the carbon structure. In particular, our Density Functional Theory calculations suggest that Co and Ni atoms embedded into the single vacancies of graphene can activate the O-2 molecule and contribute to the decomposition of peroxide.
PB  - Elsevier Science Sa, Lausanne
T2  - Surface and Coatings Technology
T1  - A study of ordered mesoporous carbon doped with Co and Ni as a catalyst of oxygen reduction reaction in both alkaline and acidic media
VL  - 349
SP  - 511
EP  - 521
DO  - 10.1016/j.surfcoat.2018.06.008
ER  - 
@article{
author = "Gavrilov, Nemanja and Momcilovic, Milan and Dobrota, Ana S. and Stanković, Dalibor and Jokić, Bojan and Babić, Biljana and Skorodumova, Natalia V. and Mentus, Slavko V. and Pasti, Igor A.",
year = "2018",
url = "http://cherry.chem.bg.ac.rs/handle/123456789/2088",
abstract = "The incorporation of trace amounts ( lt  0.2%) of Co and Ni noticeably enhanced the catalytic activity of nitrogen free ordered mesoporous carbon (OMC) towards oxygen reduction reaction (ORR). (Co,Ni)-doped OMCs were characterized by N-2-adsorption measurements, X-ray powder diffraction, field emission scanning electron microscopy and Raman spectroscopy methods, and their ORR activity was estimated by voltammetry on rotating disk electrode in acidic and alkaline media. (Co,Ni)-doped OMCs show modest activities in acidic media, while the catalytic activity in alkaline media is rather high. The measured activities are compared to the Pt-based and Pt-free ORR catalysts reported in the literature. The number of electrons consumed per O-2 in metal-doped OMCs was found to vary between 2 and 4, which is advantageous in comparison to metal-free OMC. Also, the mass activities of metal-doped OMCs were found to be up to 2.5 times higher compared to that of metal-free OMC. We suggest that the ORR activity is governed by a balance between (i) textural properties, which determine the electrochemically accessible surface of the catalyst and which are influenced by the addition of a metal precursor, and (ii) novel active sites formed upon the introduction of metals into the carbon structure. In particular, our Density Functional Theory calculations suggest that Co and Ni atoms embedded into the single vacancies of graphene can activate the O-2 molecule and contribute to the decomposition of peroxide.",
publisher = "Elsevier Science Sa, Lausanne",
journal = "Surface and Coatings Technology",
title = "A study of ordered mesoporous carbon doped with Co and Ni as a catalyst of oxygen reduction reaction in both alkaline and acidic media",
volume = "349",
pages = "511-521",
doi = "10.1016/j.surfcoat.2018.06.008"
}
Gavrilov, N., Momcilovic, M., Dobrota, A. S., Stanković, D., Jokić, B., Babić, B., Skorodumova, N. V., Mentus, S. V.,& Pasti, I. A. (2018). A study of ordered mesoporous carbon doped with Co and Ni as a catalyst of oxygen reduction reaction in both alkaline and acidic media.
Surface and Coatings Technology
Elsevier Science Sa, Lausanne., 349, 511-521.
https://doi.org/10.1016/j.surfcoat.2018.06.008
Gavrilov N, Momcilovic M, Dobrota AS, Stanković D, Jokić B, Babić B, Skorodumova NV, Mentus SV, Pasti IA. A study of ordered mesoporous carbon doped with Co and Ni as a catalyst of oxygen reduction reaction in both alkaline and acidic media. Surface and Coatings Technology. 2018;349:511-521
Gavrilov Nemanja, Momcilovic Milan, Dobrota Ana S., Stanković Dalibor, Jokić Bojan, Babić Biljana, Skorodumova Natalia V., Mentus Slavko V., Pasti Igor A., "A study of ordered mesoporous carbon doped with Co and Ni as a catalyst of oxygen reduction reaction in both alkaline and acidic media" Surface and Coatings Technology, 349 (2018):511-521,
https://doi.org/10.1016/j.surfcoat.2018.06.008 .
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The Effects of a Low-Level Boron, Phosphorus, and Nitrogen Doping on the Oxygen Reduction Activity of Ordered Mesoporous Carbons

Pasti, Igor A.; Gavrilov, Nemanja; Dobrota, Ana S.; Momcilovic, Milan; Stojmenovic, Marija; Topalov, Angel; Stanković, Dalibor; Babić, Biljana; Ćirić-Marjanović, Gordana; Mentus, Slavko V.

(Springer, New York, 2015)

TY  - JOUR
AU  - Pasti, Igor A.
AU  - Gavrilov, Nemanja
AU  - Dobrota, Ana S.
AU  - Momcilovic, Milan
AU  - Stojmenovic, Marija
AU  - Topalov, Angel
AU  - Stanković, Dalibor
AU  - Babić, Biljana
AU  - Ćirić-Marjanović, Gordana
AU  - Mentus, Slavko V.
PY  - 2015
UR  - http://cherry.chem.bg.ac.rs/handle/123456789/1980
AB  - In order to elucidate the role of B, N, and P dopants in carbon materials on the kinetics of oxygen reduction reaction (ORR) and to provide a fair comparison of the effects of each dopant, a series of ordered mesoporous carbons (OMCs) with low concentration of heteroatoms ( lt  1 at%) has been prepared. Doped OMCs were characterized using X-ray photoelectron spectroscopy (XPS), inductively coupled plasma optical emission spectroscopy (ICP-OES), Raman spectroscopy, X-ray powder diffraction (XRD), and N-2 physisorption measurements. Comparative study of the ORR activity of these materials in alkaline solution was performed using rotating disk electrode voltammetry. The experiments evidenced that, compared to non-doped OMC, charge transfer kinetics was improved independently on the nature of the heteroatom. The decrease of the ORR overvoltage and the increase of the mass activity upon doping are similar for B and P and less prominent for N. On the other hand, OMCs doped with low levels of B and N were found to be selective for O-2 reduction to peroxide, while for P-doped OMCs, the apparent number of electrons consumed per O-2 molecule was up to 3.1. Experimental measurements were complemented by density functional theory (DFT) calculations.
PB  - Springer, New York
T2  - Electrocatalysis
T1  - The Effects of a Low-Level Boron, Phosphorus, and Nitrogen Doping on the Oxygen Reduction Activity of Ordered Mesoporous Carbons
VL  - 6
IS  - 6
SP  - 498
EP  - 511
DO  - 10.1007/s12678-015-0271-0
ER  - 
@article{
author = "Pasti, Igor A. and Gavrilov, Nemanja and Dobrota, Ana S. and Momcilovic, Milan and Stojmenovic, Marija and Topalov, Angel and Stanković, Dalibor and Babić, Biljana and Ćirić-Marjanović, Gordana and Mentus, Slavko V.",
year = "2015",
url = "http://cherry.chem.bg.ac.rs/handle/123456789/1980",
abstract = "In order to elucidate the role of B, N, and P dopants in carbon materials on the kinetics of oxygen reduction reaction (ORR) and to provide a fair comparison of the effects of each dopant, a series of ordered mesoporous carbons (OMCs) with low concentration of heteroatoms ( lt  1 at%) has been prepared. Doped OMCs were characterized using X-ray photoelectron spectroscopy (XPS), inductively coupled plasma optical emission spectroscopy (ICP-OES), Raman spectroscopy, X-ray powder diffraction (XRD), and N-2 physisorption measurements. Comparative study of the ORR activity of these materials in alkaline solution was performed using rotating disk electrode voltammetry. The experiments evidenced that, compared to non-doped OMC, charge transfer kinetics was improved independently on the nature of the heteroatom. The decrease of the ORR overvoltage and the increase of the mass activity upon doping are similar for B and P and less prominent for N. On the other hand, OMCs doped with low levels of B and N were found to be selective for O-2 reduction to peroxide, while for P-doped OMCs, the apparent number of electrons consumed per O-2 molecule was up to 3.1. Experimental measurements were complemented by density functional theory (DFT) calculations.",
publisher = "Springer, New York",
journal = "Electrocatalysis",
title = "The Effects of a Low-Level Boron, Phosphorus, and Nitrogen Doping on the Oxygen Reduction Activity of Ordered Mesoporous Carbons",
volume = "6",
number = "6",
pages = "498-511",
doi = "10.1007/s12678-015-0271-0"
}
Pasti, I. A., Gavrilov, N., Dobrota, A. S., Momcilovic, M., Stojmenovic, M., Topalov, A., Stanković, D., Babić, B., Ćirić-Marjanović, G.,& Mentus, S. V. (2015). The Effects of a Low-Level Boron, Phosphorus, and Nitrogen Doping on the Oxygen Reduction Activity of Ordered Mesoporous Carbons.
Electrocatalysis
Springer, New York., 6(6), 498-511.
https://doi.org/10.1007/s12678-015-0271-0
Pasti IA, Gavrilov N, Dobrota AS, Momcilovic M, Stojmenovic M, Topalov A, Stanković D, Babić B, Ćirić-Marjanović G, Mentus SV. The Effects of a Low-Level Boron, Phosphorus, and Nitrogen Doping on the Oxygen Reduction Activity of Ordered Mesoporous Carbons. Electrocatalysis. 2015;6(6):498-511
Pasti Igor A., Gavrilov Nemanja, Dobrota Ana S., Momcilovic Milan, Stojmenovic Marija, Topalov Angel, Stanković Dalibor, Babić Biljana, Ćirić-Marjanović Gordana, Mentus Slavko V., "The Effects of a Low-Level Boron, Phosphorus, and Nitrogen Doping on the Oxygen Reduction Activity of Ordered Mesoporous Carbons" Electrocatalysis, 6, no. 6 (2015):498-511,
https://doi.org/10.1007/s12678-015-0271-0 .
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