Self-supported nanostructured iridium-based networks as highly active electrocatalysts for oxygen evolution in acidic media
| العنوان: | Self-supported nanostructured iridium-based networks as highly active electrocatalysts for oxygen evolution in acidic media |
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| المؤلفون: | Jonathan Quinson, Matthias Arenz, Gustav Sievers, Kim Degn Jensen, Anders Jensen, José Alejandro Arminio-Ravelo, Volker Brüser, María Escudero-Escribano |
| المصدر: | Jensen, A W, Sievers, G W, Jensen, K D, Quinson, J, Arminio-Ravelo, J A, Brüser, V, Arenz, M & Escudero-Escribano, M 2020, ' Self-supported nanostructured iridium-based networks as highly active electrocatalysts for oxygen evolution in acidic media ', Journal of Materials Chemistry A, vol. 8, no. 3, pp. 1066-1071 . https://doi.org/10.1039/c9ta12796h |
| بيانات النشر: | Royal Society of Chemistry (RSC), 2020. |
| سنة النشر: | 2020 |
| مصطلحات موضوعية: | Renewable Energy, Sustainability and the Environment, Oxygen evolution, chemistry.chemical_element, Proton exchange membrane fuel cell, Nanoparticle, 02 engineering and technology, General Chemistry, 010402 general chemistry, 021001 nanoscience & nanotechnology, 01 natural sciences, 0104 chemical sciences, Catalysis, Anode, chemistry, Chemical engineering, 540 Chemistry, 570 Life sciences, biology, General Materials Science, Iridium, Selective leaching, 0210 nano-technology, Cobalt |
| الوصف: | Due to the slow kinetics of the oxygen evolution reaction (OER), high precious metal loadings are currently required at the anode of proton exchange membrane (PEM) electrolyzers. In this work, we present a novel, scalable and efficient method for the fabrication of high surface area iridium-based electrocatalysts. Using alternating sputtering of iridium and cobalt, followed by selective leaching, we produce a self-supported and highly active OER electrocatalysts for acidic environments. Nanostructured IrOx-networks present a bulk-like behaviour, with a site-specific activity similar to that of extended polycrystalline IrOx surfaces. Moreover, in terms of mass activity, the IrOx-networks are among the most active Ir-based catalysts reported, presenting a mass activity enhancement by a factor of eight over commercial Ir-black nanoparticles. These novel self-supported Ir-based networks are very stable, which, combined with their enhanced mass activity, makes them promising anode catalysts for PEM electrolyzers. |
| تدمد: | 2050-7496 2050-7488 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a5a4481ef42b3e86067dc4c49930fdcc https://doi.org/10.1039/c9ta12796h |
| حقوق: | RESTRICTED |
| رقم الأكسشن: | edsair.doi.dedup.....a5a4481ef42b3e86067dc4c49930fdcc |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 20507496 20507488 |
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