Single Co<sub>3</sub>O<sub>4</sub> Nanocubes Electrocatalyzing the Oxygen Evolution Reaction: Nano-Impact Insights into Intrinsic Activity and Support Effects
Single-entity electrochemistry allows for assessing electrocatalytic activities of individual material entities such as nanoparticles (NPs). Thus, it becomes possible to consider intrinsic electrochemical properties of nanocatalysts when researching how activity relates to physical and structural ma...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-12-01
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| Series: | International Journal of Molecular Sciences |
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| Online Access: | https://www.mdpi.com/1422-0067/22/23/13137 |
| _version_ | 1797507728390750208 |
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| author | Zhibin Liu Manuel Corva Hatem M. A. Amin Niclas Blanc Julia Linnemann Kristina Tschulik |
| author_facet | Zhibin Liu Manuel Corva Hatem M. A. Amin Niclas Blanc Julia Linnemann Kristina Tschulik |
| author_sort | Zhibin Liu |
| collection | DOAJ |
| description | Single-entity electrochemistry allows for assessing electrocatalytic activities of individual material entities such as nanoparticles (NPs). Thus, it becomes possible to consider intrinsic electrochemical properties of nanocatalysts when researching how activity relates to physical and structural material properties. Conversely, conventional electrochemical techniques provide a normalized sum current referring to a huge ensemble of NPs constituting, along with additives (e.g., binders), a complete catalyst-coated electrode. Accordingly, recording electrocatalytic responses of single NPs avoids interferences of ensemble effects and reduces the complexity of electrocatalytic processes, thus enabling detailed description and modelling. Herein, we present insights into the oxygen evolution catalysis at individual cubic Co<sub>3</sub>O<sub>4</sub> NPs impacting microelectrodes of different support materials. Simulating diffusion at supported nanocubes, measured step current signals can be analyzed, providing edge lengths, corresponding size distributions, and interference-free turnover frequencies. The provided nano-impact investigation of (electro-)catalyst-support effects contradicts assumptions on a low number of highly active sites. |
| first_indexed | 2024-03-10T04:52:33Z |
| format | Article |
| id | doaj.art-aa47048a18784f4b8fde56d480be8ac0 |
| institution | Directory Open Access Journal |
| issn | 1661-6596 1422-0067 |
| language | English |
| last_indexed | 2024-03-10T04:52:33Z |
| publishDate | 2021-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | International Journal of Molecular Sciences |
| spelling | doaj.art-aa47048a18784f4b8fde56d480be8ac02023-11-23T02:33:52ZengMDPI AGInternational Journal of Molecular Sciences1661-65961422-00672021-12-0122231313710.3390/ijms222313137Single Co<sub>3</sub>O<sub>4</sub> Nanocubes Electrocatalyzing the Oxygen Evolution Reaction: Nano-Impact Insights into Intrinsic Activity and Support EffectsZhibin Liu0Manuel Corva1Hatem M. A. Amin2Niclas Blanc3Julia Linnemann4Kristina Tschulik5Analytical Chemistry II, Faculty of Chemistry and Biochemistry, Ruhr University Bochum, 44801 Bochum, GermanyAnalytical Chemistry II, Faculty of Chemistry and Biochemistry, Ruhr University Bochum, 44801 Bochum, GermanyAnalytical Chemistry II, Faculty of Chemistry and Biochemistry, Ruhr University Bochum, 44801 Bochum, GermanyAnalytical Chemistry II, Faculty of Chemistry and Biochemistry, Ruhr University Bochum, 44801 Bochum, GermanyAnalytical Chemistry II, Faculty of Chemistry and Biochemistry, Ruhr University Bochum, 44801 Bochum, GermanyAnalytical Chemistry II, Faculty of Chemistry and Biochemistry, Ruhr University Bochum, 44801 Bochum, GermanySingle-entity electrochemistry allows for assessing electrocatalytic activities of individual material entities such as nanoparticles (NPs). Thus, it becomes possible to consider intrinsic electrochemical properties of nanocatalysts when researching how activity relates to physical and structural material properties. Conversely, conventional electrochemical techniques provide a normalized sum current referring to a huge ensemble of NPs constituting, along with additives (e.g., binders), a complete catalyst-coated electrode. Accordingly, recording electrocatalytic responses of single NPs avoids interferences of ensemble effects and reduces the complexity of electrocatalytic processes, thus enabling detailed description and modelling. Herein, we present insights into the oxygen evolution catalysis at individual cubic Co<sub>3</sub>O<sub>4</sub> NPs impacting microelectrodes of different support materials. Simulating diffusion at supported nanocubes, measured step current signals can be analyzed, providing edge lengths, corresponding size distributions, and interference-free turnover frequencies. The provided nano-impact investigation of (electro-)catalyst-support effects contradicts assumptions on a low number of highly active sites.https://www.mdpi.com/1422-0067/22/23/13137single-entity electrochemistryCo<sub>3</sub>O<sub>4</sub>oxygen evolution reactionnanoparticlesupport effect |
| spellingShingle | Zhibin Liu Manuel Corva Hatem M. A. Amin Niclas Blanc Julia Linnemann Kristina Tschulik Single Co<sub>3</sub>O<sub>4</sub> Nanocubes Electrocatalyzing the Oxygen Evolution Reaction: Nano-Impact Insights into Intrinsic Activity and Support Effects International Journal of Molecular Sciences single-entity electrochemistry Co<sub>3</sub>O<sub>4</sub> oxygen evolution reaction nanoparticle support effect |
| title | Single Co<sub>3</sub>O<sub>4</sub> Nanocubes Electrocatalyzing the Oxygen Evolution Reaction: Nano-Impact Insights into Intrinsic Activity and Support Effects |
| title_full | Single Co<sub>3</sub>O<sub>4</sub> Nanocubes Electrocatalyzing the Oxygen Evolution Reaction: Nano-Impact Insights into Intrinsic Activity and Support Effects |
| title_fullStr | Single Co<sub>3</sub>O<sub>4</sub> Nanocubes Electrocatalyzing the Oxygen Evolution Reaction: Nano-Impact Insights into Intrinsic Activity and Support Effects |
| title_full_unstemmed | Single Co<sub>3</sub>O<sub>4</sub> Nanocubes Electrocatalyzing the Oxygen Evolution Reaction: Nano-Impact Insights into Intrinsic Activity and Support Effects |
| title_short | Single Co<sub>3</sub>O<sub>4</sub> Nanocubes Electrocatalyzing the Oxygen Evolution Reaction: Nano-Impact Insights into Intrinsic Activity and Support Effects |
| title_sort | single co sub 3 sub o sub 4 sub nanocubes electrocatalyzing the oxygen evolution reaction nano impact insights into intrinsic activity and support effects |
| topic | single-entity electrochemistry Co<sub>3</sub>O<sub>4</sub> oxygen evolution reaction nanoparticle support effect |
| url | https://www.mdpi.com/1422-0067/22/23/13137 |
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