Academic Journal
High-Performance Supported Iridium Oxohydroxide Water Oxidation Electrocatalysts
| العنوان: | High-Performance Supported Iridium Oxohydroxide Water Oxidation Electrocatalysts |
|---|---|
| المؤلفون: | Massué, C., Pfeifer, V., Huang, X., Noack, J., Tarasov, A., Cap, S., Schlögl, R. |
| المصدر: | ChemSusChem |
| سنة النشر: | 2017 |
| المجموعة: | Max Planck Society: MPG.PuRe |
| الوصف: | The synthesis of a highly active and yet stable electrocatalyst for the anodic oxygen evolution reaction (OER) remains a major challenge for acidic water splitting on an industrial scale. To address this challenge, we obtained an outstanding high-performance OER catalyst by loading Ir on conductive antimony-doped tin oxide (ATO)-nanoparticles by a microwave (MW)-assisted hydrothermal route. The obtained Ir phase was identified by using XRD as amorphous (XRD-amorphous), highly hydrated Ir III/IV oxohydroxide. To identify chemical and structural features responsible for the high activity and exceptional stability under acidic OER conditions with loadings as low as 20 µg Ir cm -2 , we used stepwise thermal treatment to gradually alter the XRD-amorphous Ir phase by dehydroxylation and crystallization of IrO 2 . This resulted in dramatic depletion of OER performance, indicating that the outstanding electrocatalytic properties of the MW-produced Ir III/IV oxohydroxide are prominently linked to the nature of the produced Ir phase. This finding is in contrast with the often reported stable but poor OER performance of crystalline IrO 2 -based compounds produced through more classical calcination routes. Our investigation demonstrates the immense potential of Ir oxohydroxide- based OER electrocatalysts for stable high-current water electrolysis under acidic conditions. |
| نوع الوثيقة: | article in journal/newspaper |
| وصف الملف: | application/pdf |
| اللغة: | English |
| Relation: | http://hdl.handle.net/11858/00-001M-0000-002D-7BDB-4; http://hdl.handle.net/11858/00-001M-0000-002E-6280-C; http://hdl.handle.net/11858/00-001M-0000-002E-6281-A; http://hdl.handle.net/21.11116/0000-0004-BDDB-1 |
| الاتاحة: | http://hdl.handle.net/11858/00-001M-0000-002D-7BDB-4 http://hdl.handle.net/11858/00-001M-0000-002E-6280-C http://hdl.handle.net/11858/00-001M-0000-002E-6281-A http://hdl.handle.net/21.11116/0000-0004-BDDB-1 |
| Rights: | info:eu-repo/semantics/openAccess |
| رقم الانضمام: | edsbas.ECE42445 |
| قاعدة البيانات: | BASE |
| الوصف غير متاح. |