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Carbon-encapsulated heazlewoodite nanoparticles as highly efficient and durable electrocatalysts for oxygen evolution reactions

The activity and durability of electrocatalysts are important factors in their practical applications, such as electrocatalytic oxygen evolution reactions (OERs) used in water splitting cells and metal–air batteries. In this study, a novel electrocatalyst, comprising few-layered graphitic carbon (~5... Full description

Journal Title: Nano Research 2017, Vol.10(10), pp.3522-3533
Main Author: Al-Mamun, Mohammad
Other Authors: Yin, Huajie , Liu, Porun , Su, Xintai , Zhang, Haimin , Yang, Huagui , Wang, Dan , Tang, Zhiyong , Wang, Yun , Zhao, Huijun
Format: Electronic Article Electronic Article
Language: English
Subjects:
ID: ISSN: 1998-0124 ; E-ISSN: 1998-0000 ; DOI: 10.1007/s12274-017-1563-x
Link: http://dx.doi.org/10.1007/s12274-017-1563-x
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recordid: springer_jour10.1007/s12274-017-1563-x
title: Carbon-encapsulated heazlewoodite nanoparticles as highly efficient and durable electrocatalysts for oxygen evolution reactions
format: Article
creator:
  • Al-Mamun, Mohammad
  • Yin, Huajie
  • Liu, Porun
  • Su, Xintai
  • Zhang, Haimin
  • Yang, Huagui
  • Wang, Dan
  • Tang, Zhiyong
  • Wang, Yun
  • Zhao, Huijun
subjects:
  • heazlewoodite
  • electrocatalyst
  • encapsulation
  • oxygen evolution reaction
  • pyrolysis
  • graphitic carbon
ispartof: Nano Research, 2017, Vol.10(10), pp.3522-3533
description: The activity and durability of electrocatalysts are important factors in their practical applications, such as electrocatalytic oxygen evolution reactions (OERs) used in water splitting cells and metal–air batteries. In this study, a novel electrocatalyst, comprising few-layered graphitic carbon (~5 atomic layers) encapsulated heazlewoodite (Ni 3 S 2 @C) nanoparticles (NPs), was designed and synthesized using a one-step solid phase pyrolysis method. In the OER test, the Ni 3 S 2 @C catalyst exhibited an overpotential of 298 mV at a current density of 10 mA·cm –2 , a Tafel slope of 51.3 mV·dec –1 , and charge transfer resistance of 22.0 Ω, which were better than those of benchmark RuO 2 and most nickel-sulfide-based catalysts previously reported. This improved performance was ascribed to the high electronic conductivity of the graphitic carbon encapsulating layers. Moreover, the encapsulation of graphitic carbon layers provided superb stability without noticeable oxidation or depletion of Ni 3 S 2 NPs within the nanocomposite. Therefore, the strategy introduced in this work can benefit the development of highly stable metal sulfide electrocatalysts for energy conversion and storage applications, without sacrificing electrocatalytic activity.
language: eng
source:
identifier: ISSN: 1998-0124 ; E-ISSN: 1998-0000 ; DOI: 10.1007/s12274-017-1563-x
fulltext: fulltext
issn:
  • 1998-0000
  • 19980000
  • 1998-0124
  • 19980124
url: Link


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titleCarbon-encapsulated heazlewoodite nanoparticles as highly efficient and durable electrocatalysts for oxygen evolution reactions
creatorAl-Mamun, Mohammad ; Yin, Huajie ; Liu, Porun ; Su, Xintai ; Zhang, Haimin ; Yang, Huagui ; Wang, Dan ; Tang, Zhiyong ; Wang, Yun ; Zhao, Huijun
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subjectheazlewoodite ; electrocatalyst ; encapsulation ; oxygen evolution reaction ; pyrolysis ; graphitic carbon
descriptionThe activity and durability of electrocatalysts are important factors in their practical applications, such as electrocatalytic oxygen evolution reactions (OERs) used in water splitting cells and metal–air batteries. In this study, a novel electrocatalyst, comprising few-layered graphitic carbon (~5 atomic layers) encapsulated heazlewoodite (Ni 3 S 2 @C) nanoparticles (NPs), was designed and synthesized using a one-step solid phase pyrolysis method. In the OER test, the Ni 3 S 2 @C catalyst exhibited an overpotential of 298 mV at a current density of 10 mA·cm –2 , a Tafel slope of 51.3 mV·dec –1 , and charge transfer resistance of 22.0 Ω, which were better than those of benchmark RuO 2 and most nickel-sulfide-based catalysts previously reported. This improved performance was ascribed to the high electronic conductivity of the graphitic carbon encapsulating layers. Moreover, the encapsulation of graphitic carbon layers provided superb stability without noticeable oxidation or depletion of Ni 3 S 2 NPs within the nanocomposite. Therefore, the strategy introduced in this work can benefit the development of highly stable metal sulfide electrocatalysts for energy conversion and storage applications, without sacrificing electrocatalytic activity.
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titleCarbon-encapsulated heazlewoodite nanoparticles as highly efficient and durable electrocatalysts for oxygen evolution reactions
descriptionThe activity and durability of electrocatalysts are important factors in their practical applications, such as electrocatalytic oxygen evolution reactions (OERs) used in water splitting cells and metal–air batteries. In this study, a novel electrocatalyst, comprising few-layered graphitic carbon (~5 atomic layers) encapsulated heazlewoodite (Ni 3 S 2 @C) nanoparticles (NPs), was designed and synthesized using a one-step solid phase pyrolysis method. In the OER test, the Ni 3 S 2 @C catalyst exhibited an overpotential of 298 mV at a current density of 10 mA·cm –2 , a Tafel slope of 51.3 mV·dec –1 , and charge transfer resistance of 22.0 Ω, which were better than those of benchmark RuO 2 and most nickel-sulfide-based catalysts previously reported. This improved performance was ascribed to the high electronic conductivity of the graphitic carbon encapsulating layers. Moreover, the encapsulation of graphitic carbon layers provided superb stability without noticeable oxidation or depletion of Ni 3 S 2 NPs within the nanocomposite. Therefore, the strategy introduced in this work can benefit the development of highly stable metal sulfide electrocatalysts for energy conversion and storage applications, without sacrificing electrocatalytic activity.
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abstractThe activity and durability of electrocatalysts are important factors in their practical applications, such as electrocatalytic oxygen evolution reactions (OERs) used in water splitting cells and metal–air batteries. In this study, a novel electrocatalyst, comprising few-layered graphitic carbon (~5 atomic layers) encapsulated heazlewoodite (Ni 3 S 2 @C) nanoparticles (NPs), was designed and synthesized using a one-step solid phase pyrolysis method. In the OER test, the Ni 3 S 2 @C catalyst exhibited an overpotential of 298 mV at a current density of 10 mA·cm –2 , a Tafel slope of 51.3 mV·dec –1 , and charge transfer resistance of 22.0 Ω, which were better than those of benchmark RuO 2 and most nickel-sulfide-based catalysts previously reported. This improved performance was ascribed to the high electronic conductivity of the graphitic carbon encapsulating layers. Moreover, the encapsulation of graphitic carbon layers provided superb stability without noticeable oxidation or depletion of Ni 3 S 2 NPs within the nanocomposite. Therefore, the strategy introduced in this work can benefit the development of highly stable metal sulfide electrocatalysts for energy conversion and storage applications, without sacrificing electrocatalytic activity.
copBeijing
pubTsinghua University Press
doi10.1007/s12274-017-1563-x
pages3522-3533
date2017-10