| Title: | Selection on antimony-doped tin oxide (ATO) as an efficient support for iridium-based oxygen evolution reaction (OER) catalyst in acidic media |
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| Authors: | ID Khan, Ikhlas Ahmad (Author)
ID Morgen, Per (Author)
ID Gyergyek, Sašo (Author)
ID Sharma, Raghunandan (Author)
ID Andersen, Shuang Ma (Author) |
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| Files: |  1-s2.0-S0254058423009008-main.pdf (4,13 MB)
MD5: D7E2C7BBFBBC6765DD2290A5C2F24419
 https://www.sciencedirect.com/science/article/pii/S0254058423009008?via%3Dihub
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| Language: | English |
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| Work type: | Article |
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| Typology: | 1.01 - Original Scientific Article |
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| Organization: | FKKT - Faculty of Chemistry and Chemical Engineering
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| Abstract: | Reducing the iridium content while preserving high OER activity is an important prerequisite for the progress of inexpensive anodic water splitting electrocatalysts in low pH medium. Here we report the effects of bulk and surface structures of antimony doped tin oxide (ATO) supports on the ATO supported Ir-based electrocatalyst’s activity for oxygen evolution reaction (OER) in acidic media. Ability of the ATO supports to anchor the Ir nanoparticles, measured as the fraction of Ir species from reaction bath landed on ATO support (conversion efficiency; η c ), is found to be strongly dependent on its surface chemistry, characterized in terms of presence of surface oxygen groups (O surface ). Both O surface content and electronic conductivity of ATOs show strong influence on OER activity. In general, high conductivity and low O surface though low O surface may compromise η c content are preferred for high OER activity, . The optimal catalyst demonstrates superior OER activity of 777 A g 1 , 2.5 times that of the state-of-the-art commercial catalyst at 1.65 V vs. RHE. Further, the synthesized catalysts exhibit durability comparable to that of the commercial counterpart. |
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| Publication status: | Published |
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| Publication version: | Version of Record |
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| Submitted for review: | 22.04.2023 |
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| Article acceptance date: | 15.07.2023 |
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| Publication date: | 17.07.2023 |
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| Publisher: | Elsevier Sequoia S.A. |
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| Year of publishing: | 2023 |
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| Number of pages: | str. 128192-1-128192-11 |
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| Numbering: | Vol. 308 |
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| PID: | 20.500.12556/DKUM-88513  |
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| UDC: | 620.1/.2 |
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| ISSN on article: | 0254-0584 |
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| COBISS.SI-ID: | 161011971 |
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| DOI: | 10.1016/j.matchemphys.2023.128192 |
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| Publication date in DKUM: | 08.05.2024 |
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| Views: | 295 |
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| Downloads: | 66 |
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| Metadata: |    |
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| Categories: | Misc.
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