Cargando…

Hydrogen peroxide reduction on single platinum nanoparticles

Understanding oxygen reduction, key to much of electrochemical energy transformation technology, crucially requires exploration of the role of hydrogen peroxide as a possible intermediate especially on catalysts such as Pt which can bring about the 4e reduction of O(2) to water. We reveal that at th...

Descripción completa

Detalles Bibliográficos
Autores principales: Chang, Xin, Batchelor-McAuley, Christopher, Compton, Richard G.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: The Royal Society of Chemistry 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8159481/
https://www.ncbi.nlm.nih.gov/pubmed/34122898
http://dx.doi.org/10.1039/d0sc00379d
_version_ 1783700097479999488
author Chang, Xin
Batchelor-McAuley, Christopher
Compton, Richard G.
author_facet Chang, Xin
Batchelor-McAuley, Christopher
Compton, Richard G.
author_sort Chang, Xin
collection PubMed
description Understanding oxygen reduction, key to much of electrochemical energy transformation technology, crucially requires exploration of the role of hydrogen peroxide as a possible intermediate especially on catalysts such as Pt which can bring about the 4e reduction of O(2) to water. We reveal that at the single nanoparticle scale the direct platinum catalysed reduction of hydrogen peroxide is found – even at high overpotentials – not to be controlled by the rate mass-transport of the reagents to the interface but by a surface limited process. Further under alkaline (pH 12.3) and near mass-transport free conditions, the single nanoparticle hydrogen peroxide reduction rate goes through a maximum at potentials comparable to the surface deposition of hydrogen (H(upd)) with the highest reaction rate occurring when the surface is partially covered in hydrogen.
format Online
Article
Text
id pubmed-8159481
institution National Center for Biotechnology Information
language English
publishDate 2020
publisher The Royal Society of Chemistry
record_format MEDLINE/PubMed
spelling pubmed-81594812021-06-11 Hydrogen peroxide reduction on single platinum nanoparticles Chang, Xin Batchelor-McAuley, Christopher Compton, Richard G. Chem Sci Chemistry Understanding oxygen reduction, key to much of electrochemical energy transformation technology, crucially requires exploration of the role of hydrogen peroxide as a possible intermediate especially on catalysts such as Pt which can bring about the 4e reduction of O(2) to water. We reveal that at the single nanoparticle scale the direct platinum catalysed reduction of hydrogen peroxide is found – even at high overpotentials – not to be controlled by the rate mass-transport of the reagents to the interface but by a surface limited process. Further under alkaline (pH 12.3) and near mass-transport free conditions, the single nanoparticle hydrogen peroxide reduction rate goes through a maximum at potentials comparable to the surface deposition of hydrogen (H(upd)) with the highest reaction rate occurring when the surface is partially covered in hydrogen. The Royal Society of Chemistry 2020-04-08 /pmc/articles/PMC8159481/ /pubmed/34122898 http://dx.doi.org/10.1039/d0sc00379d Text en This journal is © The Royal Society of Chemistry https://creativecommons.org/licenses/by-nc/3.0/
spellingShingle Chemistry
Chang, Xin
Batchelor-McAuley, Christopher
Compton, Richard G.
Hydrogen peroxide reduction on single platinum nanoparticles
title Hydrogen peroxide reduction on single platinum nanoparticles
title_full Hydrogen peroxide reduction on single platinum nanoparticles
title_fullStr Hydrogen peroxide reduction on single platinum nanoparticles
title_full_unstemmed Hydrogen peroxide reduction on single platinum nanoparticles
title_short Hydrogen peroxide reduction on single platinum nanoparticles
title_sort hydrogen peroxide reduction on single platinum nanoparticles
topic Chemistry
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8159481/
https://www.ncbi.nlm.nih.gov/pubmed/34122898
http://dx.doi.org/10.1039/d0sc00379d
work_keys_str_mv AT changxin hydrogenperoxidereductiononsingleplatinumnanoparticles
AT batchelormcauleychristopher hydrogenperoxidereductiononsingleplatinumnanoparticles
AT comptonrichardg hydrogenperoxidereductiononsingleplatinumnanoparticles