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Controlled Synthesis of PtNi Hexapods for Enhanced Oxygen Reduction Reaction

Well-defined PtNi nanocrystals represent one of the most efficient electrocatalysts to boost the oxygen reduction reaction (ORR), especially in the shape of octahedrons, nanoframes, and nanowires. However, the synthesis of complex PtNi nanostructure is still a great challenge. Herein, we report a ne...

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Autores principales: Song, Xing, Luo, Shuiping, Fan, Xiaokun, Tang, Min, Zhao, Xixia, Chen, Wen, Yang, Qi, Quan, Zewei
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Frontiers Media S.A. 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6180145/
https://www.ncbi.nlm.nih.gov/pubmed/30338256
http://dx.doi.org/10.3389/fchem.2018.00468
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author Song, Xing
Luo, Shuiping
Fan, Xiaokun
Tang, Min
Zhao, Xixia
Chen, Wen
Yang, Qi
Quan, Zewei
author_facet Song, Xing
Luo, Shuiping
Fan, Xiaokun
Tang, Min
Zhao, Xixia
Chen, Wen
Yang, Qi
Quan, Zewei
author_sort Song, Xing
collection PubMed
description Well-defined PtNi nanocrystals represent one of the most efficient electrocatalysts to boost the oxygen reduction reaction (ORR), especially in the shape of octahedrons, nanoframes, and nanowires. However, the synthesis of complex PtNi nanostructure is still a great challenge. Herein, we report a new class of PtNi hexapods with high activity and stability toward ORR. The hexapods are prepared by selective capping and simultaneous corrosion. By controlling the oxidative etching, PtNi polyhedrons and nanoparticles are obtained, respectively. The intriguing hexapods are composed of six nanopods with an average length of 12.5 nm. Due to their sharp tips and three-dimensional (3D) accessible surfaces, the PtNi hexapods show a high mass activity of 0.85 A mg [Formula: see text] at 0.9 V vs. RHE, which are 5.4-fold higher than commercial Pt/C, also outperforming PtNi polyhedrons and PtNi nanoparticles. In addition, the mass activity of PtNi hexapods maintains 92.3% even after 10,000 potential cycles.
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spelling pubmed-61801452018-10-18 Controlled Synthesis of PtNi Hexapods for Enhanced Oxygen Reduction Reaction Song, Xing Luo, Shuiping Fan, Xiaokun Tang, Min Zhao, Xixia Chen, Wen Yang, Qi Quan, Zewei Front Chem Chemistry Well-defined PtNi nanocrystals represent one of the most efficient electrocatalysts to boost the oxygen reduction reaction (ORR), especially in the shape of octahedrons, nanoframes, and nanowires. However, the synthesis of complex PtNi nanostructure is still a great challenge. Herein, we report a new class of PtNi hexapods with high activity and stability toward ORR. The hexapods are prepared by selective capping and simultaneous corrosion. By controlling the oxidative etching, PtNi polyhedrons and nanoparticles are obtained, respectively. The intriguing hexapods are composed of six nanopods with an average length of 12.5 nm. Due to their sharp tips and three-dimensional (3D) accessible surfaces, the PtNi hexapods show a high mass activity of 0.85 A mg [Formula: see text] at 0.9 V vs. RHE, which are 5.4-fold higher than commercial Pt/C, also outperforming PtNi polyhedrons and PtNi nanoparticles. In addition, the mass activity of PtNi hexapods maintains 92.3% even after 10,000 potential cycles. Frontiers Media S.A. 2018-10-04 /pmc/articles/PMC6180145/ /pubmed/30338256 http://dx.doi.org/10.3389/fchem.2018.00468 Text en Copyright © 2018 Song, Luo, Fan, Tang, Zhao, Chen, Yang and Quan. http://creativecommons.org/licenses/by/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
spellingShingle Chemistry
Song, Xing
Luo, Shuiping
Fan, Xiaokun
Tang, Min
Zhao, Xixia
Chen, Wen
Yang, Qi
Quan, Zewei
Controlled Synthesis of PtNi Hexapods for Enhanced Oxygen Reduction Reaction
title Controlled Synthesis of PtNi Hexapods for Enhanced Oxygen Reduction Reaction
title_full Controlled Synthesis of PtNi Hexapods for Enhanced Oxygen Reduction Reaction
title_fullStr Controlled Synthesis of PtNi Hexapods for Enhanced Oxygen Reduction Reaction
title_full_unstemmed Controlled Synthesis of PtNi Hexapods for Enhanced Oxygen Reduction Reaction
title_short Controlled Synthesis of PtNi Hexapods for Enhanced Oxygen Reduction Reaction
title_sort controlled synthesis of ptni hexapods for enhanced oxygen reduction reaction
topic Chemistry
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6180145/
https://www.ncbi.nlm.nih.gov/pubmed/30338256
http://dx.doi.org/10.3389/fchem.2018.00468
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