Single \(Co_{3}O_{4}\) nanocubes electrocatalyzing the oxygen evolution reaction
- 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\(_3\)O\(_4\) 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.
Author: | Zhibin LiuGND, Manuel CorvaORCiDGND, Hatem M. A. AminORCiDGND, Niclas BlancGND, Julia LinnemannORCiDGND, Kristina TschulikORCiDGND |
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URN: | urn:nbn:de:hbz:294-84650 |
DOI: | https://doi.org/10.3390/ijms222313137 |
Parent Title (English): | International journal of molecular sciences |
Subtitle (English): | nano-impact insights into intrinsic activity and support effects |
Publisher: | MDPI |
Place of publication: | Basel |
Document Type: | Article |
Language: | English |
Date of Publication (online): | 2021/12/09 |
Date of first Publication: | 2021/12/04 |
Publishing Institution: | Ruhr-Universität Bochum, Universitätsbibliothek |
Tag: | MITICAT, Projekt ID 949724 Co\(_3\)O\(_4\); nanoparticle; oxygen evolution reaction; single-entity electrochemistry; support effect |
Volume: | 22 |
Issue: | 23, Artikel 13137 |
First Page: | 13137-1 |
Last Page: | 13137-12 |
Note: | Projekt MITICAT, Project ID: 949724 |
Relation (DC): | info:eu-repo/grantAgreement/EC/H2020/949724 |
Institutes/Facilities: | Lehrstuhl für Analytische Chemie II, Elektrochemie und Nanoskalige Materialien |
Dewey Decimal Classification: | Naturwissenschaften und Mathematik / Chemie, Kristallographie, Mineralogie |
OpenAIRE: | OpenAIRE |
faculties: | Fakultät für Chemie und Biochemie |
Licence (English): | Creative Commons - CC BY 4.0 - Attribution 4.0 International |