1D Composite Nanorods of Cobalt Phosphide-Cobalt Sulfide with Improved Electrocatalyst Performance

Haslinda Binti Mohd Sidek, Xiaoyan Jin, Md Shahinul Islam, Seong Ju Hwang

Research output: Contribution to journalArticle

Abstract

Efficient electrocatalysts of cobalt phosphide-cobalt sulfide 1D composite nanorods for hydrogen evolution reaction (HER) are synthesized by heat-treatment of cobalt phosphide nanorod under CS2 flow. The reaction of cobalt phosphide with CS2 molecule leads to the formation of CoP−CoS composite with the maintenance of original 1D nanorod morphology. In comparison with the pristine CoP nanorod, the CoP−CoS composite nanorod shows much higher HER electrocatalytic activity with much lower overpotential, highlighting the beneficial effect of composite formation with metal sulfide on electrocatalyst performance of metal phosphide. The composite formation with CoS domain results in the remarkable enhancement of HER kinetics, electrochemical active surface area, and charge transfer kinetics, which is mainly responsible for the enhanced electrocatalytic activity of composite nanorod. The present study underscores that hybridization with metal sulfide can provide an efficient methodology to improve the electrocatalyst functionality of metal phosphide.

Original languageEnglish
JournalChemCatChem
DOIs
Publication statusAccepted/In press - 2019 Jan 1

Fingerprint

phosphides
electrocatalysts
Electrocatalysts
Cobalt
Nanorods
nanorods
sulfides
cobalt
composite materials
Composite materials
Metals
Hydrogen
Sulfides
metals
hydrogen
Reaction kinetics
maintenance
cobaltous sulfide
Charge transfer
reaction kinetics

All Science Journal Classification (ASJC) codes

  • Catalysis
  • Physical and Theoretical Chemistry
  • Organic Chemistry
  • Inorganic Chemistry

Cite this

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title = "1D Composite Nanorods of Cobalt Phosphide-Cobalt Sulfide with Improved Electrocatalyst Performance",
abstract = "Efficient electrocatalysts of cobalt phosphide-cobalt sulfide 1D composite nanorods for hydrogen evolution reaction (HER) are synthesized by heat-treatment of cobalt phosphide nanorod under CS2 flow. The reaction of cobalt phosphide with CS2 molecule leads to the formation of CoP−CoS composite with the maintenance of original 1D nanorod morphology. In comparison with the pristine CoP nanorod, the CoP−CoS composite nanorod shows much higher HER electrocatalytic activity with much lower overpotential, highlighting the beneficial effect of composite formation with metal sulfide on electrocatalyst performance of metal phosphide. The composite formation with CoS domain results in the remarkable enhancement of HER kinetics, electrochemical active surface area, and charge transfer kinetics, which is mainly responsible for the enhanced electrocatalytic activity of composite nanorod. The present study underscores that hybridization with metal sulfide can provide an efficient methodology to improve the electrocatalyst functionality of metal phosphide.",
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1D Composite Nanorods of Cobalt Phosphide-Cobalt Sulfide with Improved Electrocatalyst Performance. / Sidek, Haslinda Binti Mohd; Jin, Xiaoyan; Islam, Md Shahinul; Hwang, Seong Ju.

In: ChemCatChem, 01.01.2019.

Research output: Contribution to journalArticle

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T1 - 1D Composite Nanorods of Cobalt Phosphide-Cobalt Sulfide with Improved Electrocatalyst Performance

AU - Sidek, Haslinda Binti Mohd

AU - Jin, Xiaoyan

AU - Islam, Md Shahinul

AU - Hwang, Seong Ju

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AB - Efficient electrocatalysts of cobalt phosphide-cobalt sulfide 1D composite nanorods for hydrogen evolution reaction (HER) are synthesized by heat-treatment of cobalt phosphide nanorod under CS2 flow. The reaction of cobalt phosphide with CS2 molecule leads to the formation of CoP−CoS composite with the maintenance of original 1D nanorod morphology. In comparison with the pristine CoP nanorod, the CoP−CoS composite nanorod shows much higher HER electrocatalytic activity with much lower overpotential, highlighting the beneficial effect of composite formation with metal sulfide on electrocatalyst performance of metal phosphide. The composite formation with CoS domain results in the remarkable enhancement of HER kinetics, electrochemical active surface area, and charge transfer kinetics, which is mainly responsible for the enhanced electrocatalytic activity of composite nanorod. The present study underscores that hybridization with metal sulfide can provide an efficient methodology to improve the electrocatalyst functionality of metal phosphide.

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