Academic Journal
Atomically dispersed Iridium on Indium tin oxide efficiently catalyzes water oxidation
| العنوان: | Atomically dispersed Iridium on Indium tin oxide efficiently catalyzes water oxidation |
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| المؤلفون: | Lebedev, Dmitry, Ezhov, Roman, Heras-Domingo, Javier, Comas-Vives, Aleix, Kaeffer, Nicolas, Willinger, Marc, Solans Monfort, Xavier, Huang, Xing, Pushkar, Yulia, Copéret, Christophe |
| سنة النشر: | 2020 |
| المجموعة: | Universitat Autònoma de Barcelona: Dipòsit Digital de Documents de la UAB |
| الوصف: | This is an open access article published under an ACS AuthorChoice License, which permits copying and redistribution of the article or any adaptations for non-commercial purposes: https://pubs.acs.org/page/policy/authorchoice_termsofuse.html ; Heterogeneous catalysts in the form of atomically dispersed metals on a support provide the most efficient utilization of the active component, which is especially important for scarce and expensive late transition metals. These catalysts also enable unique opportunities to understand reaction pathways through detailed spectroscopic and computational studies. Here, we demonstrate that atomically dispersed iridium sites on indium tin oxide prepared via surface organometallic chemistry display exemplary catalytic activity in one of the most challenging electrochemical processes, the oxygen evolution reaction (OER). In situ X-ray absorption studies revealed the formation of Ir V =O intermediate under OER conditions with an Ir-O distance of 1.83 Ã…. Modeling of the reaction mechanism indicates that Ir V =O is likely a catalyst resting state, which is subsequently oxidized to Ir VI enabling fast water nucleophilic attack and oxygen evolution. We anticipate that the applied strategy can be instrumental in preparing and studying a broad range of atomically dispersed transition metal catalysts on conductive oxides for (photo)electrochemical applications. Site-isolated Ir on ITO is identified as an efficient acidic water splitting catalyst. In situ spectroscopy and modeling reveal the key Ir V =O intermediate and allow proposing the reaction mechanism. |
| نوع الوثيقة: | article in journal/newspaper |
| وصف الملف: | application/pdf |
| اللغة: | English |
| تدمد: | 32724853 23747951 |
| Relation: | Agencia Estatal de Investigación CTQ2017-89132-P; Agència de Gestió d'Ajuts Universitaris i de Recerca 2017/SGR-1320; Ministerio de Educación y Ciencia RyC-2016-19930; Agencia Estatal de Investigación PGC2018-100818-A-I00; ACS Central Science; Vol. 6 (July 2020), p. 1189-1198; https://ddd.uab.cat/record/231216; urn:10.1021/acscentsci.0c00604; urn:oai:ddd.uab.cat:231216; urn:pmcid:PMC7379386; urn:pmid:32724853; urn:articleid:23747951v6p1189; urn:oai:pubmedcentral.nih.gov:7379386; urn:scopus_id:85087677021 |
| الاتاحة: | https://ddd.uab.cat/record/231216 |
| Rights: | open access ; Aquest material està protegit per drets d'autor i/o drets afins. Podeu utilitzar aquest material en funció del que permet la legislació de drets d'autor i drets afins d'aplicació al vostre cas. Per a d'altres usos heu d'obtenir permÃs del(s) titular(s) de drets. ; https://rightsstatements.org/vocab/InC/1.0/ |
| رقم الانضمام: | edsbas.CC548456 |
| قاعدة البيانات: | BASE |
Full Text Finder | تدمد: | 32724853 23747951 |
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