Results 31 to 40 of about 158,986 (254)

Breaking Long-Range Order in Iridium Oxide by Alkali Ion for Efficient Water Oxidation.

open access: yesJournal of the American Chemical Society, 2019
Oxygen electrochemistry plays a critical role in clean energy technologies such as fuel cells and electrolyzers, but the oxygen evolution reaction (OER) severely restricts the efficiency of these devices due to its slow kinetics.
Jiajian Gao   +11 more
semanticscholar   +1 more source

A Hexanuclear Iridium Chain

open access: yesAngewandte Chemie International Edition, 2003
Electrons in chains: A novel metallic chain made up of six iridium atoms (see picture) with an average oxidation state of +1.33 has been found in the complex HH,HT,HH-[Ir6(μ-OPy)6(I)2(CO)12] (Opy=2-pyridonate, H=head, T=tail). This complex provides a new link in the electronic sequence connecting dinuclear IrI and IrII complexes.
Tejel, Cristina   +5 more
openaire   +4 more sources

Low-cost machine learning approach to the prediction of transition metal phosphor excited state properties [PDF]

open access: yesarXiv, 2022
Photoactive iridium complexes are of broad interest due to their applications ranging from lighting to photocatalysis. However, the excited state property prediction of these complexes challenges ab initio methods such as time-dependent density functional theory (TDDFT) both from an accuracy and a computational cost perspective, complicating high ...
arxiv  

Globally distributed iridium layer preserved within the Chicxulub impact structure

open access: yesScience Advances, 2021
The preservation of the iridium-rich layer within the Chicxulub crater captures the timing of the K-Pg boundary events. The Cretaceous-Paleogene (K-Pg) mass extinction is marked globally by elevated concentrations of iridium, emplaced by a hypervelocity ...
S. Goderis   +31 more
semanticscholar   +1 more source

Superconductivity in Ca10(Ir4As8)(Fe2As2)5 with Square-Planar Coordination of Iridium [PDF]

open access: yesScientific Reports 3 (2013) 3101, 2013
We report the unprecedented square-planar coordination of iridium in the iron iridium arsenide Ca10(Ir4As8)(Fe2As2)5. This material experiences superconductivity at 16 K. X-ray photoemission spectroscopy and first- principles band calculation suggest Ir(II) oxidation state, which yields electrically conductive Ir4As8 layers. Such metallic spacer layers
arxiv   +1 more source

Smartphone-Based pH Sensor for Home Monitoring of Pulmonary Exacerbations in Cystic Fibrosis. [PDF]

open access: yes, 2017
Currently, Cystic Fibrosis (CF) patients lack the ability to track their lung health at home, relying instead on doctor checkups leading to delayed treatment and lung damage.
Conrad, Douglas   +5 more
core   +2 more sources

Tensile straining of iridium sites in manganese oxides for proton-exchange membrane water electrolysers

open access: yesNature Communications
Although the acidic oxygen evolution reaction (OER) plays a crucial role in proton-exchange membrane water electrolysis (PEMWE) devices, challenges remain owing to the lack of efficient and acid-stable electrocatalysts.
Hui Su   +8 more
semanticscholar   +1 more source

High-pressure formation and stabilization of iridium hydrides [PDF]

open access: yes, 2013
A class of iridium hydrides, IrH_x (x=0.5, 1-4, 6), is calculated at ab-initio level using the DFT. A number of hydrides are predicted to stabilize in the excess hydrogen environment and upon compression. The threshold pressure for thermodynamical stabilization is calculated to ~5 and ~14 GPa at which, respectively, a trihydride (P6_3mc) and a ...
arxiv   +1 more source

Substrate patterning using regular macroporous block copolymer monoliths as sacrificial templates and as capillary microstamps [PDF]

open access: yesSmall 2018, 14, 1801452, 2018
Polystyrene-block-poly(2-vinylpyridine) (PS-b-P2VP) monoliths containing regular arrays of macropores (diameter ~1.1 microns, depth ~700 nm) at their surfaces are used to pattern substrates by patterning modes going beyond the functionality of classical solid elastomer stamps.
arxiv   +1 more source

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