Cargando…

Intermetallic Pd(3)X (X= Ti and Zr) nanocrystals for electro-oxidation of alcohols and formic acid in alkaline and acidic media

Two highly active and stable Pd-based intermetallic nanocrystals with early d-metals Pd(3)Ti and Pd(3)Zr have been developed. The nanocrystals are synthesized by co-reduction of the respective salts of Pd and Ti/Zr. Hard X-ray photoemission Spectroscopy (HAXPES) analysis of the nanocrystals indicate...

Descripción completa

Detalles Bibliográficos
Autores principales: Kodiyath, Rajesh, V. Ramesh, Gubbala, Manikandan, Maidhily, Ueda, Shigenori, Fujita, Takeshi, Abe, Hideki
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Taylor & Francis 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7476510/
https://www.ncbi.nlm.nih.gov/pubmed/32939181
http://dx.doi.org/10.1080/14686996.2020.1789437
_version_ 1783579714725609472
author Kodiyath, Rajesh
V. Ramesh, Gubbala
Manikandan, Maidhily
Ueda, Shigenori
Fujita, Takeshi
Abe, Hideki
author_facet Kodiyath, Rajesh
V. Ramesh, Gubbala
Manikandan, Maidhily
Ueda, Shigenori
Fujita, Takeshi
Abe, Hideki
author_sort Kodiyath, Rajesh
collection PubMed
description Two highly active and stable Pd-based intermetallic nanocrystals with early d-metals Pd(3)Ti and Pd(3)Zr have been developed. The nanocrystals are synthesized by co-reduction of the respective salts of Pd and Ti/Zr. Hard X-ray photoemission Spectroscopy (HAXPES) analysis of the nanocrystals indicates that the electronic properties of Pd are modified significantly, as evident from the lowering of the d-band center of Pd. The intermetallic nanocrystals dispersed in Vulcan carbon, Pd(3)Ti/C and Pd(3)Zr/C, exhibit improved electrocatalytic activity towards methanol and ethanol oxidation in an alkaline medium (0.5 M KOH), compared to those of commercially available catalysts such as Pd/C, Pt/C, and Pt(3)Sn/C. In addition, Pd(3)Ti/C and Pd(3)Zr/C show significantly higher activity towards the oxidation of formic acid in an acidic medium (0.5 M H(2)SO(4)), compared to those of Pd/C and Pt/C. The modification of the d-band center of Pd as a result of the alloying of Pd with the early d-metals Ti and Zr may be responsible for the enhanced catalytic activity.
format Online
Article
Text
id pubmed-7476510
institution National Center for Biotechnology Information
language English
publishDate 2020
publisher Taylor & Francis
record_format MEDLINE/PubMed
spelling pubmed-74765102020-09-15 Intermetallic Pd(3)X (X= Ti and Zr) nanocrystals for electro-oxidation of alcohols and formic acid in alkaline and acidic media Kodiyath, Rajesh V. Ramesh, Gubbala Manikandan, Maidhily Ueda, Shigenori Fujita, Takeshi Abe, Hideki Sci Technol Adv Mater Focus on Intermetallic Catalysts Two highly active and stable Pd-based intermetallic nanocrystals with early d-metals Pd(3)Ti and Pd(3)Zr have been developed. The nanocrystals are synthesized by co-reduction of the respective salts of Pd and Ti/Zr. Hard X-ray photoemission Spectroscopy (HAXPES) analysis of the nanocrystals indicates that the electronic properties of Pd are modified significantly, as evident from the lowering of the d-band center of Pd. The intermetallic nanocrystals dispersed in Vulcan carbon, Pd(3)Ti/C and Pd(3)Zr/C, exhibit improved electrocatalytic activity towards methanol and ethanol oxidation in an alkaline medium (0.5 M KOH), compared to those of commercially available catalysts such as Pd/C, Pt/C, and Pt(3)Sn/C. In addition, Pd(3)Ti/C and Pd(3)Zr/C show significantly higher activity towards the oxidation of formic acid in an acidic medium (0.5 M H(2)SO(4)), compared to those of Pd/C and Pt/C. The modification of the d-band center of Pd as a result of the alloying of Pd with the early d-metals Ti and Zr may be responsible for the enhanced catalytic activity. Taylor & Francis 2020-08-24 /pmc/articles/PMC7476510/ /pubmed/32939181 http://dx.doi.org/10.1080/14686996.2020.1789437 Text en © 2020 The Author(s). Published by National Institute for Materials Science in partnership with Taylor & Francis Group. https://creativecommons.org/licenses/by/4.0/This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) ), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
spellingShingle Focus on Intermetallic Catalysts
Kodiyath, Rajesh
V. Ramesh, Gubbala
Manikandan, Maidhily
Ueda, Shigenori
Fujita, Takeshi
Abe, Hideki
Intermetallic Pd(3)X (X= Ti and Zr) nanocrystals for electro-oxidation of alcohols and formic acid in alkaline and acidic media
title Intermetallic Pd(3)X (X= Ti and Zr) nanocrystals for electro-oxidation of alcohols and formic acid in alkaline and acidic media
title_full Intermetallic Pd(3)X (X= Ti and Zr) nanocrystals for electro-oxidation of alcohols and formic acid in alkaline and acidic media
title_fullStr Intermetallic Pd(3)X (X= Ti and Zr) nanocrystals for electro-oxidation of alcohols and formic acid in alkaline and acidic media
title_full_unstemmed Intermetallic Pd(3)X (X= Ti and Zr) nanocrystals for electro-oxidation of alcohols and formic acid in alkaline and acidic media
title_short Intermetallic Pd(3)X (X= Ti and Zr) nanocrystals for electro-oxidation of alcohols and formic acid in alkaline and acidic media
title_sort intermetallic pd(3)x (x= ti and zr) nanocrystals for electro-oxidation of alcohols and formic acid in alkaline and acidic media
topic Focus on Intermetallic Catalysts
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7476510/
https://www.ncbi.nlm.nih.gov/pubmed/32939181
http://dx.doi.org/10.1080/14686996.2020.1789437
work_keys_str_mv AT kodiyathrajesh intermetallicpd3xxtiandzrnanocrystalsforelectrooxidationofalcoholsandformicacidinalkalineandacidicmedia
AT vrameshgubbala intermetallicpd3xxtiandzrnanocrystalsforelectrooxidationofalcoholsandformicacidinalkalineandacidicmedia
AT manikandanmaidhily intermetallicpd3xxtiandzrnanocrystalsforelectrooxidationofalcoholsandformicacidinalkalineandacidicmedia
AT uedashigenori intermetallicpd3xxtiandzrnanocrystalsforelectrooxidationofalcoholsandformicacidinalkalineandacidicmedia
AT fujitatakeshi intermetallicpd3xxtiandzrnanocrystalsforelectrooxidationofalcoholsandformicacidinalkalineandacidicmedia
AT abehideki intermetallicpd3xxtiandzrnanocrystalsforelectrooxidationofalcoholsandformicacidinalkalineandacidicmedia