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Single Particle Nanoelectrochemistry Reveals the Catalytic Oxygen Evolution Reaction Activity of Co(3)O(4) Nanocubes

Co(3)O(4) nanocubes are evaluated concerning their intrinsic electrocatalytic activity towards the oxygen evolution reaction (OER) by means of single‐entity electrochemistry. Scanning electrochemical cell microscopy (SECCM) provides data on the electrocatalytic OER activity from several individual m...

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Autores principales: Quast, Thomas, Varhade, Swapnil, Saddeler, Sascha, Chen, Yen‐Ting, Andronescu, Corina, Schulz, Stephan, Schuhmann, Wolfgang
Formato: Online Artículo Texto
Lenguaje:English
Publicado: John Wiley and Sons Inc. 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8596605/
https://www.ncbi.nlm.nih.gov/pubmed/34411401
http://dx.doi.org/10.1002/anie.202109201
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author Quast, Thomas
Varhade, Swapnil
Saddeler, Sascha
Chen, Yen‐Ting
Andronescu, Corina
Schulz, Stephan
Schuhmann, Wolfgang
author_facet Quast, Thomas
Varhade, Swapnil
Saddeler, Sascha
Chen, Yen‐Ting
Andronescu, Corina
Schulz, Stephan
Schuhmann, Wolfgang
author_sort Quast, Thomas
collection PubMed
description Co(3)O(4) nanocubes are evaluated concerning their intrinsic electrocatalytic activity towards the oxygen evolution reaction (OER) by means of single‐entity electrochemistry. Scanning electrochemical cell microscopy (SECCM) provides data on the electrocatalytic OER activity from several individual measurement areas covering one Co(3)O(4) nanocube of a comparatively high number of individual particles with sufficient statistical reproducibility. Single‐particle‐on‐nanoelectrode measurements of Co(3)O(4) nanocubes provide an accelerated stress test at highly alkaline conditions with current densities of up to 5.5 A cm(−2), and allows to derive TOF values of up to 2.8×10(4) s(−1) at 1.92 V vs. RHE for surface Co atoms of a single cubic nanoparticle. Obtaining such high current densities combined with identical‐location transmission electron microscopy allows monitoring the formation of an oxy(hydroxide) surface layer during electrocatalysis. Combining two independent single‐entity electrochemistry techniques provides the basis for elucidating structure–activity relations of single electrocatalyst nanoparticles with well‐defined surface structure.
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spelling pubmed-85966052021-11-22 Single Particle Nanoelectrochemistry Reveals the Catalytic Oxygen Evolution Reaction Activity of Co(3)O(4) Nanocubes Quast, Thomas Varhade, Swapnil Saddeler, Sascha Chen, Yen‐Ting Andronescu, Corina Schulz, Stephan Schuhmann, Wolfgang Angew Chem Int Ed Engl Research Articles Co(3)O(4) nanocubes are evaluated concerning their intrinsic electrocatalytic activity towards the oxygen evolution reaction (OER) by means of single‐entity electrochemistry. Scanning electrochemical cell microscopy (SECCM) provides data on the electrocatalytic OER activity from several individual measurement areas covering one Co(3)O(4) nanocube of a comparatively high number of individual particles with sufficient statistical reproducibility. Single‐particle‐on‐nanoelectrode measurements of Co(3)O(4) nanocubes provide an accelerated stress test at highly alkaline conditions with current densities of up to 5.5 A cm(−2), and allows to derive TOF values of up to 2.8×10(4) s(−1) at 1.92 V vs. RHE for surface Co atoms of a single cubic nanoparticle. Obtaining such high current densities combined with identical‐location transmission electron microscopy allows monitoring the formation of an oxy(hydroxide) surface layer during electrocatalysis. Combining two independent single‐entity electrochemistry techniques provides the basis for elucidating structure–activity relations of single electrocatalyst nanoparticles with well‐defined surface structure. John Wiley and Sons Inc. 2021-09-23 2021-10-18 /pmc/articles/PMC8596605/ /pubmed/34411401 http://dx.doi.org/10.1002/anie.202109201 Text en © 2021 The Authors. Angewandte Chemie International Edition published by Wiley-VCH GmbH https://creativecommons.org/licenses/by-nc-nd/4.0/This is an open access article under the terms of the http://creativecommons.org/licenses/by-nc-nd/4.0/ (https://creativecommons.org/licenses/by-nc-nd/4.0/) License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non‐commercial and no modifications or adaptations are made.
spellingShingle Research Articles
Quast, Thomas
Varhade, Swapnil
Saddeler, Sascha
Chen, Yen‐Ting
Andronescu, Corina
Schulz, Stephan
Schuhmann, Wolfgang
Single Particle Nanoelectrochemistry Reveals the Catalytic Oxygen Evolution Reaction Activity of Co(3)O(4) Nanocubes
title Single Particle Nanoelectrochemistry Reveals the Catalytic Oxygen Evolution Reaction Activity of Co(3)O(4) Nanocubes
title_full Single Particle Nanoelectrochemistry Reveals the Catalytic Oxygen Evolution Reaction Activity of Co(3)O(4) Nanocubes
title_fullStr Single Particle Nanoelectrochemistry Reveals the Catalytic Oxygen Evolution Reaction Activity of Co(3)O(4) Nanocubes
title_full_unstemmed Single Particle Nanoelectrochemistry Reveals the Catalytic Oxygen Evolution Reaction Activity of Co(3)O(4) Nanocubes
title_short Single Particle Nanoelectrochemistry Reveals the Catalytic Oxygen Evolution Reaction Activity of Co(3)O(4) Nanocubes
title_sort single particle nanoelectrochemistry reveals the catalytic oxygen evolution reaction activity of co(3)o(4) nanocubes
topic Research Articles
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8596605/
https://www.ncbi.nlm.nih.gov/pubmed/34411401
http://dx.doi.org/10.1002/anie.202109201
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