In-situ growth of graphene decorated Ni3S2 pyramids on Ni foam for high-performance overall water splitting

Jing Yu, Yue Du, Qianqian Li, Liang Zhen, Vinayak P Dravid, Jinsong Wu, Cheng Yan Xu

Research output: Contribution to journalArticle

Abstract

Rational design of high-performance electrocatalysts with low cost and large abundance is highly desirable for water splitting technology. Here we report the synthesis of Ni3S2 pyramids coated with crimped graphene (Ni3S2@G), the unique configuration of which endows Ni3S2@G with large roughness, creating much more active sites along the edges. Moreover, the coupling of graphene enhances the electrical conductivity of the nanocomposite, and thus improves the electrocatalytic activity due to synergistic effect between graphene and Ni3S2. Ni3S2@G hybrid shows outstanding performance toward both hydrogen evolution reactions (HER) and oxygen evolution reactions (OER) with low overpotentials (η10 = 103 mV for HER and η20 = 294 mV for OER) and small Tafel slope. Ni3S2@G electrode also exhibits superior full water splitting ability with a low cell voltage of 1.66 V.

LanguageEnglish (US)
Pages772-779
Number of pages8
JournalApplied Surface Science
Volume465
DOIs
StatePublished - Jan 28 2019

Fingerprint

Graphite
Graphene
Foams
Water
Hydrogen
Oxygen
Electrocatalysts
Nanocomposites
Surface roughness
Electrodes
Electric potential
Costs

Keywords

  • Electrocatalyst
  • Graphene
  • Nickel sulphide
  • Synergistic effect
  • Water splitting

ASJC Scopus subject areas

  • Surfaces, Coatings and Films

Cite this

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title = "In-situ growth of graphene decorated Ni3S2 pyramids on Ni foam for high-performance overall water splitting",
abstract = "Rational design of high-performance electrocatalysts with low cost and large abundance is highly desirable for water splitting technology. Here we report the synthesis of Ni3S2 pyramids coated with crimped graphene (Ni3S2@G), the unique configuration of which endows Ni3S2@G with large roughness, creating much more active sites along the edges. Moreover, the coupling of graphene enhances the electrical conductivity of the nanocomposite, and thus improves the electrocatalytic activity due to synergistic effect between graphene and Ni3S2. Ni3S2@G hybrid shows outstanding performance toward both hydrogen evolution reactions (HER) and oxygen evolution reactions (OER) with low overpotentials (η10 = 103 mV for HER and η20 = 294 mV for OER) and small Tafel slope. Ni3S2@G electrode also exhibits superior full water splitting ability with a low cell voltage of 1.66 V.",
keywords = "Electrocatalyst, Graphene, Nickel sulphide, Synergistic effect, Water splitting",
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In-situ growth of graphene decorated Ni3S2 pyramids on Ni foam for high-performance overall water splitting. / Yu, Jing; Du, Yue; Li, Qianqian; Zhen, Liang; Dravid, Vinayak P; Wu, Jinsong; Xu, Cheng Yan.

In: Applied Surface Science, Vol. 465, 28.01.2019, p. 772-779.

Research output: Contribution to journalArticle

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T1 - In-situ growth of graphene decorated Ni3S2 pyramids on Ni foam for high-performance overall water splitting

AU - Yu, Jing

AU - Du, Yue

AU - Li, Qianqian

AU - Zhen, Liang

AU - Dravid, Vinayak P

AU - Wu, Jinsong

AU - Xu, Cheng Yan

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AB - Rational design of high-performance electrocatalysts with low cost and large abundance is highly desirable for water splitting technology. Here we report the synthesis of Ni3S2 pyramids coated with crimped graphene (Ni3S2@G), the unique configuration of which endows Ni3S2@G with large roughness, creating much more active sites along the edges. Moreover, the coupling of graphene enhances the electrical conductivity of the nanocomposite, and thus improves the electrocatalytic activity due to synergistic effect between graphene and Ni3S2. Ni3S2@G hybrid shows outstanding performance toward both hydrogen evolution reactions (HER) and oxygen evolution reactions (OER) with low overpotentials (η10 = 103 mV for HER and η20 = 294 mV for OER) and small Tafel slope. Ni3S2@G electrode also exhibits superior full water splitting ability with a low cell voltage of 1.66 V.

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