Anomalous in situ Activation of Carbon-Supported Ni2P Nanoparticles for Oxygen Evolving Electrocatalysis in Alkaline Media

Abstract Electrochemical water splitting is one of the most promising systems by which to store energy produced from sustainable sources, such as solar and wind energy. Designing robust and stable electrocatalysts is urgently needed because of the relatively sluggish kinetics of the anodic reaction,...

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Autores principales:	Young-Hoon Chung, Injoon Jang, Jue-Hyuk Jang, Hyun S. Park, Hyung Chul Ham, Jong Hyun Jang, Yong-Kul Lee, Sung Jong Yoo
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/b864b57dac5c4213b40b5390fbf04c95
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spelling	oai:doaj.org-article:b864b57dac5c4213b40b5390fbf04c952021-12-02T16:08:21ZAnomalous in situ Activation of Carbon-Supported Ni2P Nanoparticles for Oxygen Evolving Electrocatalysis in Alkaline Media10.1038/s41598-017-08296-02045-2322https://doaj.org/article/b864b57dac5c4213b40b5390fbf04c952017-08-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-08296-0https://doaj.org/toc/2045-2322Abstract Electrochemical water splitting is one of the most promising systems by which to store energy produced from sustainable sources, such as solar and wind energy. Designing robust and stable electrocatalysts is urgently needed because of the relatively sluggish kinetics of the anodic reaction, i.e. the oxygen evolution reaction (OER). In this study, we investigate the anomalous in situ activation behaviour of carbon-supported Ni2P nanoparticles (Ni2P/C) during OER catalysis in alkaline media. The activated Ni2P/C shows an exceptionally high activity and stability under OER conditions in which the overpotential needed to achieve 10 mA cm−2 was reduced from approximately 350 mV to approximately 300 mV after 8,000 cyclic voltammetric scans. In situ and ex situ characterizations indicate that the activity enhancement of Ni2P catalysts is due to a favourable phase transformation of the Ni centre to β-NiOOH, including increases in the active area induced by structural deformation under the OER conditions. These findings provide new insights towards designing transition metal/phosphide-based materials for an efficient water splitting catalyst.Young-Hoon ChungInjoon JangJue-Hyuk JangHyun S. ParkHyung Chul HamJong Hyun JangYong-Kul LeeSung Jong YooNature 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 Young-Hoon Chung Injoon Jang Jue-Hyuk Jang Hyun S. Park Hyung Chul Ham Jong Hyun Jang Yong-Kul Lee Sung Jong Yoo Anomalous in situ Activation of Carbon-Supported Ni2P Nanoparticles for Oxygen Evolving Electrocatalysis in Alkaline Media
description	Abstract Electrochemical water splitting is one of the most promising systems by which to store energy produced from sustainable sources, such as solar and wind energy. Designing robust and stable electrocatalysts is urgently needed because of the relatively sluggish kinetics of the anodic reaction, i.e. the oxygen evolution reaction (OER). In this study, we investigate the anomalous in situ activation behaviour of carbon-supported Ni2P nanoparticles (Ni2P/C) during OER catalysis in alkaline media. The activated Ni2P/C shows an exceptionally high activity and stability under OER conditions in which the overpotential needed to achieve 10 mA cm−2 was reduced from approximately 350 mV to approximately 300 mV after 8,000 cyclic voltammetric scans. In situ and ex situ characterizations indicate that the activity enhancement of Ni2P catalysts is due to a favourable phase transformation of the Ni centre to β-NiOOH, including increases in the active area induced by structural deformation under the OER conditions. These findings provide new insights towards designing transition metal/phosphide-based materials for an efficient water splitting catalyst.
format	article
author	Young-Hoon Chung Injoon Jang Jue-Hyuk Jang Hyun S. Park Hyung Chul Ham Jong Hyun Jang Yong-Kul Lee Sung Jong Yoo
author_facet	Young-Hoon Chung Injoon Jang Jue-Hyuk Jang Hyun S. Park Hyung Chul Ham Jong Hyun Jang Yong-Kul Lee Sung Jong Yoo
author_sort	Young-Hoon Chung
title	Anomalous in situ Activation of Carbon-Supported Ni2P Nanoparticles for Oxygen Evolving Electrocatalysis in Alkaline Media
title_short	Anomalous in situ Activation of Carbon-Supported Ni2P Nanoparticles for Oxygen Evolving Electrocatalysis in Alkaline Media
title_full	Anomalous in situ Activation of Carbon-Supported Ni2P Nanoparticles for Oxygen Evolving Electrocatalysis in Alkaline Media
title_fullStr	Anomalous in situ Activation of Carbon-Supported Ni2P Nanoparticles for Oxygen Evolving Electrocatalysis in Alkaline Media
title_full_unstemmed	Anomalous in situ Activation of Carbon-Supported Ni2P Nanoparticles for Oxygen Evolving Electrocatalysis in Alkaline Media
title_sort	anomalous in situ activation of carbon-supported ni2p nanoparticles for oxygen evolving electrocatalysis in alkaline media
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/b864b57dac5c4213b40b5390fbf04c95
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Anomalous in situ Activation of Carbon-Supported Ni2P Nanoparticles for Oxygen Evolving Electrocatalysis in Alkaline Media

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