Highly Enhanced OER Activity of Amorphous Co3O4 via Fabricating Hybrid Amorphous‐Crystalline Gold Nanostructures

Hybrid nanostructures of amorphous cobalt oxide (Co3O4) and crystalline gold nanoparticles (AuNPs) showed strongly enhanced OER activity compared to pure amorphous Co3O4. Particularly, gold nanorods (Au NRs) integrated amorphous Co3O4 nanostructures (aCo3O4/Au NRs) required significantly low overpot...

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Published inChemistrySelect (Weinheim) Vol. 5; no. 30; pp. 9357 - 9361
Main Authors Muthukumar, Pandi, Ranganathan, Prabha, Pannipara, Mehboobali, Al‐Sehemi, Abdullah G., Anthony, Savarimuthu Philip
Format Journal Article
LanguageEnglish
Published 14.08.2020
Subjects
amorphous electrocatalysts
cobalt oxide
Electrocatalysts
gold-cobalt hybrid nano structure
oxygen evolution reaction
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Summary:Hybrid nanostructures of amorphous cobalt oxide (Co3O4) and crystalline gold nanoparticles (AuNPs) showed strongly enhanced OER activity compared to pure amorphous Co3O4. Particularly, gold nanorods (Au NRs) integrated amorphous Co3O4 nanostructures (aCo3O4/Au NRs) required significantly low overpotential (225 mV) to produce geometric current density and needed 336 and 398 mV for achieving current density of 100 and 400 mA/cm2, respectively. Further, aCo3O4/Au NRs displayed good stability over 40 h at 336 mV. Hybrid nanostructures of amorphous Co3O4 and crystalline AuNPs exhibited strongly enhanced OER activity with low overpotential (225 mA/cm2) for achieving geometric current density and excellent stability.
ISSN:2365-6549
2365-6549
DOI:10.1002/slct.202002248