Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Role of cobalt precursors in the synthesis of Co 3 O 4 hierarchical nanostructures toward the development of cobalt‐based functional electrocatalysts for bifunctional water splitting in alkaline and acidic media
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Material Science. Dr. M. A Kazi Institute of Chemistry, University of Sindh, Jamshoro, Pakistan.ORCID iD: 0000-0001-6777-5642
Luleå University of Technology, Department of Engineering Sciences and Mathematics, Material Science. Dr. M. A Kazi Institute of Chemistry, University of Sindh, Jamshoro, Pakistan.ORCID iD: 0000-0002-6756-9862
Engineering Department, University of Modena and Reggio Emilia, Modena, Italy.
Engineering Department, University of Modena and Reggio Emilia, Modena, Italy; Chemistry, IOM‐CNR Institute, Trieste, Italy; Department of Physics, University of Johannesburg, Auckland Park, South Africa.
Show others and affiliations
2022 (English)In: Journal of the Chinese Chemical Society (Taipei), ISSN 0009-4536, E-ISSN 2192-6549, Vol. 69, no 4, p. 681-691Article in journal (Refereed) Published
Abstract [en]

The precursors have significant influence on the catalytic activity of nonprecious electrocatalysts for effective water splitting. Herein, we report active electrocatalysts based on cobalt oxide (Co3O4) hierarchical nanostructures derived from four different precursors of cobalt (acetate, nitrate, chloride, and sulfate salts) using the low-temperature aqueous chemical growth method. It has been found that the effect of precursor on the morphology of nanostructured material depends on the synthetic method. The Co3O4 nanostructures exhibited cubic phase derived from these four precursors. The Co3O4 nanostructures obtained from chloride precursor have demonstrated improved oxygen evolution reaction (OER) and hydrogen evolution reaction (HER) compared to other precursors due relatively higher content of Co3O4 nanostructures at the surface of material. An overpotential of 400 mV versus reversible hydrogen electrode (RHE) at 10 mA cm−2 was observed for HER. The Co3O4 nanostructures derived from the chloride precursor have shown favorable reaction kinetics via 34 mV dec−1 value of the Tafel slope for HER reaction. The Co3O4 nanostructures derived from chloride precursor have also shown an excellent HER durability for 15 hr in alkaline media. Furthermore, the OER functional characterization was carried out onto Co3O4 nanostructures derived from chloride precursor exhibited 220 mV overpotential at 10 mA cm−2 and Tafel slope of 56 mV dec−1. Importantly, the reason behind the favorable catalytic activity of Co3O4 nanostructures derived from chloride precursor was linked to one order of magnitude smaller charge transfer resistance and higher amount of Co3O4 content at the surface of nanostructures than the Co3O4 nanostructures derived from other precursors. The performance of Co3O4 nanostructures derived from chloride precursor via the wet chemical method suggests that cobalt chloride precursor could be of great interest for the development of efficient, stable, nonprecious, and environmentally friendly electrocatalysts for the chemical energy conversion and storage devices.

Place, publisher, year, edition, pages
John Wiley & Sons, 2022. Vol. 69, no 4, p. 681-691
National Category
Materials Chemistry
Research subject
Experimental Physics
Identifiers
URN: urn:nbn:se:ltu:diva-90259DOI: 10.1002/jccs.202200012ISI: 000779361600001Scopus ID: 2-s2.0-85127682676OAI: oai:DiVA.org:ltu-90259DiVA, id: diva2:1652580
Note

Validerad;2022;Nivå 2;2022-05-31 (johcin);

Funder: King Saud University (grant no. RSP-2022/79)

Available from: 2022-04-19 Created: 2022-04-19 Last updated: 2022-05-31Bibliographically approved

Open Access in DiVA

No full text in DiVA

Other links

Publisher's full textScopus

Authority records

Tahira, AneelaIbupoto, ZafarVomiero, Alberto

Search in DiVA

By author/editor
Tahira, AneelaIbupoto, ZafarVomiero, Alberto
By organisation
Material Science
In the same journal
Journal of the Chinese Chemical Society (Taipei)
Materials Chemistry

Search outside of DiVA

GoogleGoogle Scholar

doi
urn-nbn

Altmetric score

doi
urn-nbn
Total: 16 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf