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Co-axial heterostructures integrating palladium/titanium dioxide with carbon nanotubes for efficient electrocatalytic hydrogen evolution
Considering the depletion of fossil-fuel reserves and their negative environmental impact, new energy schemes must point towards alternative ecological processes. Efficient hydrogen evolution from water is one promising route towards a renewable energy economy and sustainable development. Here we sh...
Autores principales: | , , , , , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group
2016
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5159813/ https://www.ncbi.nlm.nih.gov/pubmed/27941752 http://dx.doi.org/10.1038/ncomms13549 |
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author | Valenti, Giovanni Boni, Alessandro Melchionna, Michele Cargnello, Matteo Nasi, Lucia Bertoni, Giovanni Gorte, Raymond J. Marcaccio, Massimo Rapino, Stefania Bonchio, Marcella Fornasiero, Paolo Prato, Maurizio Paolucci, Francesco |
author_facet | Valenti, Giovanni Boni, Alessandro Melchionna, Michele Cargnello, Matteo Nasi, Lucia Bertoni, Giovanni Gorte, Raymond J. Marcaccio, Massimo Rapino, Stefania Bonchio, Marcella Fornasiero, Paolo Prato, Maurizio Paolucci, Francesco |
author_sort | Valenti, Giovanni |
collection | PubMed |
description | Considering the depletion of fossil-fuel reserves and their negative environmental impact, new energy schemes must point towards alternative ecological processes. Efficient hydrogen evolution from water is one promising route towards a renewable energy economy and sustainable development. Here we show a tridimensional electrocatalytic interface, featuring a hierarchical, co-axial arrangement of a palladium/titanium dioxide layer on functionalized multi-walled carbon nanotubes. The resulting morphology leads to a merging of the conductive nanocarbon core with the active inorganic phase. A mechanistic synergy is envisioned by a cascade of catalytic events promoting water dissociation, hydride formation and hydrogen evolution. The nanohybrid exhibits a performance exceeding that of state-of-the-art electrocatalysts (turnover frequency of 15000 H(2) per hour at 50 mV overpotential). The Tafel slope of ∼130 mV per decade points to a rate-determining step comprised of water dissociation and formation of hydride. Comparative activities of the isolated components or their physical mixtures demonstrate that the good performance evolves from the synergistic hierarchical structure. |
format | Online Article Text |
id | pubmed-5159813 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2016 |
publisher | Nature Publishing Group |
record_format | MEDLINE/PubMed |
spelling | pubmed-51598132016-12-20 Co-axial heterostructures integrating palladium/titanium dioxide with carbon nanotubes for efficient electrocatalytic hydrogen evolution Valenti, Giovanni Boni, Alessandro Melchionna, Michele Cargnello, Matteo Nasi, Lucia Bertoni, Giovanni Gorte, Raymond J. Marcaccio, Massimo Rapino, Stefania Bonchio, Marcella Fornasiero, Paolo Prato, Maurizio Paolucci, Francesco Nat Commun Article Considering the depletion of fossil-fuel reserves and their negative environmental impact, new energy schemes must point towards alternative ecological processes. Efficient hydrogen evolution from water is one promising route towards a renewable energy economy and sustainable development. Here we show a tridimensional electrocatalytic interface, featuring a hierarchical, co-axial arrangement of a palladium/titanium dioxide layer on functionalized multi-walled carbon nanotubes. The resulting morphology leads to a merging of the conductive nanocarbon core with the active inorganic phase. A mechanistic synergy is envisioned by a cascade of catalytic events promoting water dissociation, hydride formation and hydrogen evolution. The nanohybrid exhibits a performance exceeding that of state-of-the-art electrocatalysts (turnover frequency of 15000 H(2) per hour at 50 mV overpotential). The Tafel slope of ∼130 mV per decade points to a rate-determining step comprised of water dissociation and formation of hydride. Comparative activities of the isolated components or their physical mixtures demonstrate that the good performance evolves from the synergistic hierarchical structure. Nature Publishing Group 2016-12-12 /pmc/articles/PMC5159813/ /pubmed/27941752 http://dx.doi.org/10.1038/ncomms13549 Text en Copyright © 2016, The Author(s) http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article's Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ |
spellingShingle | Article Valenti, Giovanni Boni, Alessandro Melchionna, Michele Cargnello, Matteo Nasi, Lucia Bertoni, Giovanni Gorte, Raymond J. Marcaccio, Massimo Rapino, Stefania Bonchio, Marcella Fornasiero, Paolo Prato, Maurizio Paolucci, Francesco Co-axial heterostructures integrating palladium/titanium dioxide with carbon nanotubes for efficient electrocatalytic hydrogen evolution |
title | Co-axial heterostructures integrating palladium/titanium dioxide with carbon nanotubes for efficient electrocatalytic hydrogen evolution |
title_full | Co-axial heterostructures integrating palladium/titanium dioxide with carbon nanotubes for efficient electrocatalytic hydrogen evolution |
title_fullStr | Co-axial heterostructures integrating palladium/titanium dioxide with carbon nanotubes for efficient electrocatalytic hydrogen evolution |
title_full_unstemmed | Co-axial heterostructures integrating palladium/titanium dioxide with carbon nanotubes for efficient electrocatalytic hydrogen evolution |
title_short | Co-axial heterostructures integrating palladium/titanium dioxide with carbon nanotubes for efficient electrocatalytic hydrogen evolution |
title_sort | co-axial heterostructures integrating palladium/titanium dioxide with carbon nanotubes for efficient electrocatalytic hydrogen evolution |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5159813/ https://www.ncbi.nlm.nih.gov/pubmed/27941752 http://dx.doi.org/10.1038/ncomms13549 |
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