Please use this identifier to cite or link to this item:
https://physrep.ff.bg.ac.rs/handle/123456789/1312
DC Field | Value | Language |
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dc.contributor.author | Lačnjevac, Uroš | en_US |
dc.contributor.author | Vasilić, Rastko | en_US |
dc.contributor.author | Dobrota, Ana | en_US |
dc.contributor.author | Đurđić, Slađana | en_US |
dc.contributor.author | Tomanec, Ondřej | en_US |
dc.contributor.author | Zbořil, Radek | en_US |
dc.contributor.author | Mohajernia, Shiva | en_US |
dc.contributor.author | Nguyen, Nhat Truong | en_US |
dc.contributor.author | Skorodumova, Natalia | en_US |
dc.contributor.author | Manojlović, Dragan | en_US |
dc.contributor.author | Elezović, Nevenka | en_US |
dc.contributor.author | Pašti, Igor | en_US |
dc.contributor.author | Schmuki, Patrik | en_US |
dc.date.accessioned | 2022-09-15T16:19:53Z | - |
dc.date.available | 2022-09-15T16:19:53Z | - |
dc.date.issued | 2020-11-21 | - |
dc.identifier.issn | 2050-7488 | - |
dc.identifier.uri | https://physrep.ff.bg.ac.rs/handle/123456789/1312 | - |
dc.description.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. This journal is | en_US |
dc.relation.ispartof | Journal of Materials Chemistry A | en_US |
dc.title | High-performance hydrogen evolution electrocatalysis using proton-intercalated TiO<inf>2</inf>nanotube arrays as interactive supports for Ir nanoparticles | en_US |
dc.type | Article | en_US |
dc.identifier.doi | 10.1039/d0ta07492f | - |
dc.identifier.scopus | 2-s2.0-85096105811 | - |
dc.identifier.url | https://api.elsevier.com/content/abstract/scopus_id/85096105811 | - |
dc.relation.issue | 43 | en_US |
dc.relation.volume | 8 | en_US |
dc.relation.firstpage | 22773 | en_US |
dc.relation.lastpage | 22790 | en_US |
item.openairetype | Article | - |
item.cerifentitytype | Publications | - |
item.fulltext | No Fulltext | - |
item.openairecristype | http://purl.org/coar/resource_type/c_18cf | - |
item.grantfulltext | none | - |
crisitem.author.orcid | 0000-0003-2476-7516 | - |
Appears in Collections: | Journal Article |
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