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Platinum-Cobalt Nanowires for Efficient Alcohol Oxidation Electrocatalysis

The compositions and surface facets of platinum (Pt)-based electrocatalysts are of great significance for the development of direct alcohol fuel cells (DAFCs). We reported an approach for preparing ultrathin Pt(n)Co(100−n) nanowire (NW) catalysts with high activity. The Pt(n)Co(100−n) NW alloy catal...

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Autores principales: Wang, Wenwen, Bai, Xinyi, Yuan, Xiaochu, Liu, Yumin, Yang, Lin, Chang, Fangfang
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9864574/
https://www.ncbi.nlm.nih.gov/pubmed/36676576
http://dx.doi.org/10.3390/ma16020840
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author Wang, Wenwen
Bai, Xinyi
Yuan, Xiaochu
Liu, Yumin
Yang, Lin
Chang, Fangfang
author_facet Wang, Wenwen
Bai, Xinyi
Yuan, Xiaochu
Liu, Yumin
Yang, Lin
Chang, Fangfang
author_sort Wang, Wenwen
collection PubMed
description The compositions and surface facets of platinum (Pt)-based electrocatalysts are of great significance for the development of direct alcohol fuel cells (DAFCs). We reported an approach for preparing ultrathin Pt(n)Co(100−n) nanowire (NW) catalysts with high activity. The Pt(n)Co(100−n) NW alloy catalysts synthesized by single-phase surfactant-free synthesis have adjustable compositions and (111) plane and strain lattices. X-ray diffraction (XRD) results indicate that the alloy composition can adjust the lattice shrinkage or expansion of Pt(n)Co(100−n) NWs. X-ray photoelectron spectroscopy (XPS) results show that the electron structure of Pt is changed by the alloying effect caused by electron modulation in the d band, and the chemical adsorption strength of Pt is decreased, thus the catalytic activity of Pt is increased. The experimental results show that the activity of Pt(n)Co(100−n) for the oxidation of methanol and ethanol is related to the exposed crystal surface, strain lattice and composition of catalysts. The Pt(n)Co(100−n) NWs exhibit stronger electrocatalytic performance for both methanol oxidation reaction (MOR) and ethanol oxidation reaction (EOR). The dominant (111) plane Pt(53)Co(47) exhibits the highest electrocatalytic activity in MOR, which is supported by the results of XPS. This discovery provides a new pathway to design high activity, stability nanocatalysts to enhance direct alcohol fuel cells.
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spelling pubmed-98645742023-01-22 Platinum-Cobalt Nanowires for Efficient Alcohol Oxidation Electrocatalysis Wang, Wenwen Bai, Xinyi Yuan, Xiaochu Liu, Yumin Yang, Lin Chang, Fangfang Materials (Basel) Article The compositions and surface facets of platinum (Pt)-based electrocatalysts are of great significance for the development of direct alcohol fuel cells (DAFCs). We reported an approach for preparing ultrathin Pt(n)Co(100−n) nanowire (NW) catalysts with high activity. The Pt(n)Co(100−n) NW alloy catalysts synthesized by single-phase surfactant-free synthesis have adjustable compositions and (111) plane and strain lattices. X-ray diffraction (XRD) results indicate that the alloy composition can adjust the lattice shrinkage or expansion of Pt(n)Co(100−n) NWs. X-ray photoelectron spectroscopy (XPS) results show that the electron structure of Pt is changed by the alloying effect caused by electron modulation in the d band, and the chemical adsorption strength of Pt is decreased, thus the catalytic activity of Pt is increased. The experimental results show that the activity of Pt(n)Co(100−n) for the oxidation of methanol and ethanol is related to the exposed crystal surface, strain lattice and composition of catalysts. The Pt(n)Co(100−n) NWs exhibit stronger electrocatalytic performance for both methanol oxidation reaction (MOR) and ethanol oxidation reaction (EOR). The dominant (111) plane Pt(53)Co(47) exhibits the highest electrocatalytic activity in MOR, which is supported by the results of XPS. This discovery provides a new pathway to design high activity, stability nanocatalysts to enhance direct alcohol fuel cells. MDPI 2023-01-15 /pmc/articles/PMC9864574/ /pubmed/36676576 http://dx.doi.org/10.3390/ma16020840 Text en © 2023 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Wang, Wenwen
Bai, Xinyi
Yuan, Xiaochu
Liu, Yumin
Yang, Lin
Chang, Fangfang
Platinum-Cobalt Nanowires for Efficient Alcohol Oxidation Electrocatalysis
title Platinum-Cobalt Nanowires for Efficient Alcohol Oxidation Electrocatalysis
title_full Platinum-Cobalt Nanowires for Efficient Alcohol Oxidation Electrocatalysis
title_fullStr Platinum-Cobalt Nanowires for Efficient Alcohol Oxidation Electrocatalysis
title_full_unstemmed Platinum-Cobalt Nanowires for Efficient Alcohol Oxidation Electrocatalysis
title_short Platinum-Cobalt Nanowires for Efficient Alcohol Oxidation Electrocatalysis
title_sort platinum-cobalt nanowires for efficient alcohol oxidation electrocatalysis
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9864574/
https://www.ncbi.nlm.nih.gov/pubmed/36676576
http://dx.doi.org/10.3390/ma16020840
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AT liuyumin platinumcobaltnanowiresforefficientalcoholoxidationelectrocatalysis
AT yanglin platinumcobaltnanowiresforefficientalcoholoxidationelectrocatalysis
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