Wetting Induced Oxidation of Pt-based Nano Catalysts Revealed by In Situ High Energy Resolution X-ray Absorption Spectroscopy

Abstract In situ high energy resolution fluorescence detection X-ray absorption spectroscopy (HERFD-XAS) was used to systematically evaluate interactions of H2O and O2 adsorbed on Pt and Pt3Co nanoparticle catalysts in different particle sizes. The systematic increase in oxidation due to adsorption...

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Autores principales:	Yi-Tao Cui, Yoshihisa Harada, Hideharu Niwa, Tatsuya Hatanaka, Naoki Nakamura, Masaki Ando, Toshihiko Yoshida, Kenji Ishii, Daiju Matsumura, Hiroshi Oji, Hironori Ofuchi, Masaharu Oshima
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/a56091c684a841439975de34883a0e6d
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spelling	oai:doaj.org-article:a56091c684a841439975de34883a0e6d2021-12-02T11:41:18ZWetting Induced Oxidation of Pt-based Nano Catalysts Revealed by In Situ High Energy Resolution X-ray Absorption Spectroscopy10.1038/s41598-017-00639-12045-2322https://doaj.org/article/a56091c684a841439975de34883a0e6d2017-05-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-00639-1https://doaj.org/toc/2045-2322Abstract In situ high energy resolution fluorescence detection X-ray absorption spectroscopy (HERFD-XAS) was used to systematically evaluate interactions of H2O and O2 adsorbed on Pt and Pt3Co nanoparticle catalysts in different particle sizes. The systematic increase in oxidation due to adsorption of different species (H2O adsorption <O2 adsorption <O2 + H2O coadsorption) suggests that cooperative behavior between O2 and H2O adsorptions is responsible for the overpotential induced by hydrated species in fuel cells. From the alloying and particle size effects, it is found that both strength of O2/H2O adsorption and their cooperative effect upon coadsorption are responsible for the specific activity of Pt catalysts.Yi-Tao CuiYoshihisa HaradaHideharu NiwaTatsuya HatanakaNaoki NakamuraMasaki AndoToshihiko YoshidaKenji IshiiDaiju MatsumuraHiroshi OjiHironori OfuchiMasaharu OshimaNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-8 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Yi-Tao Cui Yoshihisa Harada Hideharu Niwa Tatsuya Hatanaka Naoki Nakamura Masaki Ando Toshihiko Yoshida Kenji Ishii Daiju Matsumura Hiroshi Oji Hironori Ofuchi Masaharu Oshima Wetting Induced Oxidation of Pt-based Nano Catalysts Revealed by In Situ High Energy Resolution X-ray Absorption Spectroscopy
description	Abstract In situ high energy resolution fluorescence detection X-ray absorption spectroscopy (HERFD-XAS) was used to systematically evaluate interactions of H2O and O2 adsorbed on Pt and Pt3Co nanoparticle catalysts in different particle sizes. The systematic increase in oxidation due to adsorption of different species (H2O adsorption <O2 adsorption <O2 + H2O coadsorption) suggests that cooperative behavior between O2 and H2O adsorptions is responsible for the overpotential induced by hydrated species in fuel cells. From the alloying and particle size effects, it is found that both strength of O2/H2O adsorption and their cooperative effect upon coadsorption are responsible for the specific activity of Pt catalysts.
format	article
author	Yi-Tao Cui Yoshihisa Harada Hideharu Niwa Tatsuya Hatanaka Naoki Nakamura Masaki Ando Toshihiko Yoshida Kenji Ishii Daiju Matsumura Hiroshi Oji Hironori Ofuchi Masaharu Oshima
author_facet	Yi-Tao Cui Yoshihisa Harada Hideharu Niwa Tatsuya Hatanaka Naoki Nakamura Masaki Ando Toshihiko Yoshida Kenji Ishii Daiju Matsumura Hiroshi Oji Hironori Ofuchi Masaharu Oshima
author_sort	Yi-Tao Cui
title	Wetting Induced Oxidation of Pt-based Nano Catalysts Revealed by In Situ High Energy Resolution X-ray Absorption Spectroscopy
title_short	Wetting Induced Oxidation of Pt-based Nano Catalysts Revealed by In Situ High Energy Resolution X-ray Absorption Spectroscopy
title_full	Wetting Induced Oxidation of Pt-based Nano Catalysts Revealed by In Situ High Energy Resolution X-ray Absorption Spectroscopy
title_fullStr	Wetting Induced Oxidation of Pt-based Nano Catalysts Revealed by In Situ High Energy Resolution X-ray Absorption Spectroscopy
title_full_unstemmed	Wetting Induced Oxidation of Pt-based Nano Catalysts Revealed by In Situ High Energy Resolution X-ray Absorption Spectroscopy
title_sort	wetting induced oxidation of pt-based nano catalysts revealed by in situ high energy resolution x-ray absorption spectroscopy
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/a56091c684a841439975de34883a0e6d
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Wetting Induced Oxidation of Pt-based Nano Catalysts Revealed by In Situ High Energy Resolution X-ray Absorption Spectroscopy

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