TY  - JOUR
AU  - Lačnjevac, Uroš
AU  - Vasilic, Rastko
AU  - Dobrota, Ana
AU  - Durdic, Sladana
AU  - Tomanec, Ondrej
AU  - Zboril, Radek
AU  - Mohajernia, Shiva
AU  - Nhat, Truong Nguyen
AU  - Skorodumova, Natalia
AU  - Manojlović, Dragan
AU  - Elezović, Nevenka R.
AU  - Pasti, Igor
AU  - Schmuki, Patrik
PY  - 2020
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/1373
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 mu g(Ir) cm(-2) exhibits an overpotential of -63 mV at -100 mA cm(-2) and a mass activity of 34 A mg(Ir)(-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 H-2 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 Soc Chemistry, Cambridge
T2  - Journal of Materials Chemistry A
T1  - High-performance hydrogen evolution electrocatalysis using proton-intercalated TiO2 nanotube arrays as interactive supports for Ir nanoparticles
EP  - 22790
IS  - 43
SP  - 22773
VL  - 8
DO  - 10.1039/d0ta07492f
ER  - 

@article{
author = "Lačnjevac, Uroš and Vasilic, Rastko and Dobrota, Ana and Durdic, Sladana and Tomanec, Ondrej and Zboril, Radek and Mohajernia, Shiva and Nhat, Truong Nguyen and Skorodumova, Natalia and Manojlović, Dragan and Elezović, Nevenka R. and Pasti, Igor and Schmuki, Patrik",
year = "2020",
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 mu g(Ir) cm(-2) exhibits an overpotential of -63 mV at -100 mA cm(-2) and a mass activity of 34 A mg(Ir)(-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 H-2 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 Soc Chemistry, Cambridge",
journal = "Journal of Materials Chemistry A",
title = "High-performance hydrogen evolution electrocatalysis using proton-intercalated TiO2 nanotube arrays as interactive supports for Ir nanoparticles",
pages = "22790-22773",
number = "43",
volume = "8",
doi = "10.1039/d0ta07492f"
}

Lačnjevac, U., Vasilic, R., Dobrota, A., Durdic, S., Tomanec, O., Zboril, R., Mohajernia, S., Nhat, T. N., Skorodumova, N., Manojlović, D., Elezović, N. R., Pasti, I.,& Schmuki, P.. (2020). High-performance hydrogen evolution electrocatalysis using proton-intercalated TiO2 nanotube arrays as interactive supports for Ir nanoparticles. in Journal of Materials Chemistry A
Royal Soc Chemistry, Cambridge., 8(43), 22773-22790.
https://doi.org/10.1039/d0ta07492f

Lačnjevac U, Vasilic R, Dobrota A, Durdic S, Tomanec O, Zboril R, Mohajernia S, Nhat TN, Skorodumova N, Manojlović D, Elezović NR, Pasti I, Schmuki P. High-performance hydrogen evolution electrocatalysis using proton-intercalated TiO2 nanotube arrays as interactive supports for Ir nanoparticles. in Journal of Materials Chemistry A. 2020;8(43):22773-22790.
doi:10.1039/d0ta07492f .

Lačnjevac, Uroš, Vasilic, Rastko, Dobrota, Ana, Durdic, Sladana, Tomanec, Ondrej, Zboril, Radek, Mohajernia, Shiva, Nhat, Truong Nguyen, Skorodumova, Natalia, Manojlović, Dragan, Elezović, Nevenka R., Pasti, Igor, Schmuki, Patrik, "High-performance hydrogen evolution electrocatalysis using proton-intercalated TiO2 nanotube arrays as interactive supports for Ir nanoparticles" in Journal of Materials Chemistry A, 8, no. 43 (2020):22773-22790,
https://doi.org/10.1039/d0ta07492f . .

TY  - JOUR
AU  - Kostić Kravljanac, Ljiljana
AU  - Nikolić, Nina
AU  - Samardžić, Jelena T.
AU  - Milisavljević, Mira
AU  - Maksimović, Vuk
AU  - Cakmak, Dragan
AU  - Manojlović, Dragan
AU  - Nikolic, Miroslav
PY  - 2015
UR  - http://rimsi.imsi.bg.ac.rs/handle/123456789/838
AB  - We studied the effect of liming and P fertilization of extremely acid soil (accidently acidified by sulfidic mining waste) on P availability and the subsequent adaptive responses of wheat roots. The wheat plants were grown in rhizoboxes allowing precise sampling of rhizosphere and bulk soil for sequential extraction of P fractions and determination of exchangeable Al. Root exudates were collected by pieces of paper for electrophoresis and subjected to HPLC analysis. Expression of organic anions and P-i transporter genes was analyzed by a real-time quantitative PCR. The concomitant application of lime with P fertilization increased the concentrations of plant-available P fractions in both rhizosphere and bulk compartments. The applied soil amendments strongly affected plant growth, biomass partitioning and shoot P accumulation. Liming enhanced root exudation of citrate in P unfertilized plants, while the high malate efflux was maintained until both P deficiency and Al toxicity were eliminated by the amendments. We showed the importance of liming for recovering of P acquisition potential of wheat roots, which can be strongly impaired in acid soils. Our results clearly demonstrated that P-deficient roots not subjected to Al stress in the limed soil can maintain high efflux of malate and even increase efflux of citrate along with the enhanced expression of related anion transporters (TaMATE1 and TaALMT1).
PB  - Springer, New York
T2  - Biology and Fertility of Soils
T1  - Liming of anthropogenically acidified soil promotes phosphorus acquisition in the rhizosphere of wheat
EP  - 298
IS  - 3
SP  - 289
VL  - 51
DO  - 10.1007/s00374-014-0975-y
ER  - 

@article{
author = "Kostić Kravljanac, Ljiljana and Nikolić, Nina and Samardžić, Jelena T. and Milisavljević, Mira and Maksimović, Vuk and Cakmak, Dragan and Manojlović, Dragan and Nikolic, Miroslav",
year = "2015",
abstract = "We studied the effect of liming and P fertilization of extremely acid soil (accidently acidified by sulfidic mining waste) on P availability and the subsequent adaptive responses of wheat roots. The wheat plants were grown in rhizoboxes allowing precise sampling of rhizosphere and bulk soil for sequential extraction of P fractions and determination of exchangeable Al. Root exudates were collected by pieces of paper for electrophoresis and subjected to HPLC analysis. Expression of organic anions and P-i transporter genes was analyzed by a real-time quantitative PCR. The concomitant application of lime with P fertilization increased the concentrations of plant-available P fractions in both rhizosphere and bulk compartments. The applied soil amendments strongly affected plant growth, biomass partitioning and shoot P accumulation. Liming enhanced root exudation of citrate in P unfertilized plants, while the high malate efflux was maintained until both P deficiency and Al toxicity were eliminated by the amendments. We showed the importance of liming for recovering of P acquisition potential of wheat roots, which can be strongly impaired in acid soils. Our results clearly demonstrated that P-deficient roots not subjected to Al stress in the limed soil can maintain high efflux of malate and even increase efflux of citrate along with the enhanced expression of related anion transporters (TaMATE1 and TaALMT1).",
publisher = "Springer, New York",
journal = "Biology and Fertility of Soils",
title = "Liming of anthropogenically acidified soil promotes phosphorus acquisition in the rhizosphere of wheat",
pages = "298-289",
number = "3",
volume = "51",
doi = "10.1007/s00374-014-0975-y"
}

Kostić Kravljanac, L., Nikolić, N., Samardžić, J. T., Milisavljević, M., Maksimović, V., Cakmak, D., Manojlović, D.,& Nikolic, M.. (2015). Liming of anthropogenically acidified soil promotes phosphorus acquisition in the rhizosphere of wheat. in Biology and Fertility of Soils
Springer, New York., 51(3), 289-298.
https://doi.org/10.1007/s00374-014-0975-y

Kostić Kravljanac L, Nikolić N, Samardžić JT, Milisavljević M, Maksimović V, Cakmak D, Manojlović D, Nikolic M. Liming of anthropogenically acidified soil promotes phosphorus acquisition in the rhizosphere of wheat. in Biology and Fertility of Soils. 2015;51(3):289-298.
doi:10.1007/s00374-014-0975-y .

Kostić Kravljanac, Ljiljana, Nikolić, Nina, Samardžić, Jelena T., Milisavljević, Mira, Maksimović, Vuk, Cakmak, Dragan, Manojlović, Dragan, Nikolic, Miroslav, "Liming of anthropogenically acidified soil promotes phosphorus acquisition in the rhizosphere of wheat" in Biology and Fertility of Soils, 51, no. 3 (2015):289-298,
https://doi.org/10.1007/s00374-014-0975-y . .