Misfit-layered Bi1.85Sr2Co1.85O7.7-δ for the hydrogen evolution reaction: Beyond van der Waals heterostructures

Chun Kiang Chua, Zdeněk Sofer, Ondřej Jankovský, Martin Pumera

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Recent research on stable 2D nanomaterials has led to the discovery of new materials for energy-conversion and energy-storage applications. A class of layered heterostructures known as misfit-layered chalcogenides consists of well-defined atomic layers and has previously been applied as thermoelectric materials for use as high-temperature thermoelectric batteries. The performance of such misfit-layered chalcogenides in electrochemical applications, specifically the hydrogen evolution reaction, is currently unexplored. Herein, a misfit-layered chalcogenide consisting of CoO2 layers interleaved with an SrO-BiO-BiO-SrO rock-salt block and having the formula Bi1.85Sr2Co1.85O7.7-δ is synthesized and examined for its structural and electrochemical properties. The hydrogen-evolution performance of misfit-layered Bi1.85Sr2Co1.85O7.7-δ, which has an overpotential of 589 mV and a Tafel slope of 51 mV per decade, demonstrates the promising potential of misfit-layered chalcogenides as electrocatalysts instead of classical carbon.

Original languageEnglish
Pages (from-to)769-774
Number of pages6
JournalChemPhysChem
Volume16
Issue number4
DOIs
Publication statusPublished - 2015 Mar 16

Fingerprint

Chalcogenides
chalcogenides
Heterojunctions
Hydrogen
hydrogen
halites
thermoelectric materials
electrocatalysts
Electrocatalysts
energy conversion
energy storage
Electrochemical properties
Energy conversion
Nanostructured materials
Energy storage
electric batteries
Structural properties
Carbon
Salts
Rocks

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics
  • Physical and Theoretical Chemistry

Cite this

Chua, Chun Kiang ; Sofer, Zdeněk ; Jankovský, Ondřej ; Pumera, Martin. / Misfit-layered Bi1.85Sr2Co1.85O7.7-δ for the hydrogen evolution reaction : Beyond van der Waals heterostructures. In: ChemPhysChem. 2015 ; Vol. 16, No. 4. pp. 769-774.
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Misfit-layered Bi1.85Sr2Co1.85O7.7-δ for the hydrogen evolution reaction : Beyond van der Waals heterostructures. / Chua, Chun Kiang; Sofer, Zdeněk; Jankovský, Ondřej; Pumera, Martin.

In: ChemPhysChem, Vol. 16, No. 4, 16.03.2015, p. 769-774.

Research output: Contribution to journalArticle

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