Coffee-Waste Templating of Metal Ion-Substituted Cobalt Oxides for the Oxygen Evolution Reaction

Mingquan Yu, Candace Chan, Harun Tüysüz

Research output: Contribution to journalArticle

4 Citations (Scopus)

Abstract

A facile and scalable method using coffee waste grounds as a hard template has been developed to fabricate nanostructured Co3O4 for the oxygen evolution reaction (OER). Co3O4 incorporating metals with different valences (M/Co=1:4; M=Cu, Ni, Fe, Cr, and W) were also prepared with similar sheet-like structures comprising nanosized crystallites. After detailed characterization by X-ray diffraction, electron microscopy, and nitrogen sorption, the oxides were employed as OER electrocatalysts. Substitution of octahedral and tetrahedral sites of the spinel structure with divalent and trivalent transition metals (Cu, Ni, Fe, and Cr) increased the activity of Co3O4 for the OER, whereas incorporation of hexavalent W led to formation of a second crystal phase and significantly higher electrocatalytic performance. Furthermore, this method is easily scaled up for mass production of Co3O4 with the same nanostructure, which is highly desirable for large-scale application.

Original languageEnglish
Pages (from-to)605-611
Number of pages7
JournalChemSusChem
Volume11
Issue number3
DOIs
Publication statusPublished - Feb 9 2018

Fingerprint

Coffee
coffee
cobalt
Metal ions
Cobalt
oxide
Oxygen
oxygen
Oxides
ion
metal
Nitrogen Oxides
Electrocatalysts
transition element
electron microscopy
Crystallites
spinel
Electron microscopy
Transition metals
Sorption

Keywords

  • cobalt
  • electrocatalysis
  • nanostructures
  • oxygen evolution reaction
  • waste valorization

ASJC Scopus subject areas

  • Environmental Chemistry
  • Chemical Engineering(all)
  • Materials Science(all)
  • Energy(all)

Cite this

Coffee-Waste Templating of Metal Ion-Substituted Cobalt Oxides for the Oxygen Evolution Reaction. / Yu, Mingquan; Chan, Candace; Tüysüz, Harun.

In: ChemSusChem, Vol. 11, No. 3, 09.02.2018, p. 605-611.

Research output: Contribution to journalArticle

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