Overall Water Splitting Catalyzed Efficiently by an Ultrathin Nanosheet-Built, Hollow Ni3S2-Based Electrocatalyst

Yuanyuan Wu, Guo Dong Li, Yipu Liu, Lan Yang, Xinran Lian, Teddy Asefa, Xiaoxin Zou

Research output: Contribution to journalArticle

194 Citations (Scopus)

Abstract

Making highly efficient catalysts for an overall x/Ni3S2 composite microsphere catalysts on nickel foam, using ammonium molybdate as a precursor and the triblock copolymer pluronic P123 as a structure-directing agent is reported. It is also shown that the resulting materials can serve as bifunctional, non-noble metal electrocatalysts with high activity and stability for the hydrogen evolution reaction (HER) as well as the oxygen evolution reaction (OER). Thanks to their unique structural features, the materials give an impressive water-splitting current density of 10 mA cm-2 at ≈1.45 V with remarkable durability for >100 h when used as catalysts both at the cathode and the anode sides of an alkaline electrolyzer. This performance for an overall water splitting reaction is better than even those obtained with an electrolyzer consisting of noble metal-based Pt/C and IrOx/C catalytic couple-the benchmark catalysts for HER and OER, respectively.

Original languageEnglish
JournalAdvanced Functional Materials
DOIs
Publication statusAccepted/In press - 2016

Fingerprint

water splitting
electrocatalysts
Nanosheets
Electrocatalysts
hollow
Catalysts
Water
catalysts
Hydrogen
Oxygen
Precious metals
Nickel
Microspheres
molybdates
Block copolymers
Foams
oxygen
hydrogen
Anodes
Durability

Keywords

  • Electrocatalysis
  • Hollow structure
  • Nickel sulfide
  • Water splitting

ASJC Scopus subject areas

  • Biomaterials
  • Electrochemistry
  • Condensed Matter Physics
  • Electronic, Optical and Magnetic Materials

Cite this

Overall Water Splitting Catalyzed Efficiently by an Ultrathin Nanosheet-Built, Hollow Ni3S2-Based Electrocatalyst. / Wu, Yuanyuan; Li, Guo Dong; Liu, Yipu; Yang, Lan; Lian, Xinran; Asefa, Teddy; Zou, Xiaoxin.

In: Advanced Functional Materials, 2016.

Research output: Contribution to journalArticle

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AU - Lian, Xinran

AU - Asefa, Teddy

AU - Zou, Xiaoxin

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AB - Making highly efficient catalysts for an overall x/Ni3S2 composite microsphere catalysts on nickel foam, using ammonium molybdate as a precursor and the triblock copolymer pluronic P123 as a structure-directing agent is reported. It is also shown that the resulting materials can serve as bifunctional, non-noble metal electrocatalysts with high activity and stability for the hydrogen evolution reaction (HER) as well as the oxygen evolution reaction (OER). Thanks to their unique structural features, the materials give an impressive water-splitting current density of 10 mA cm-2 at ≈1.45 V with remarkable durability for >100 h when used as catalysts both at the cathode and the anode sides of an alkaline electrolyzer. This performance for an overall water splitting reaction is better than even those obtained with an electrolyzer consisting of noble metal-based Pt/C and IrOx/C catalytic couple-the benchmark catalysts for HER and OER, respectively.

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