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Highly Enhanced OER Activity of Amorphous Co 3 O 4 via Fabricating Hybrid Amorphous‐Crystalline Gold Nanostructures
Author(s) -
Muthukumar Pandi,
Ranganathan Prabha,
Pannipara Mehboobali,
AlSehemi Abdullah G.,
Anthony Savarimuthu Philip
Publication year - 2020
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.202002248
Subject(s) - amorphous solid , overpotential , materials science , nanostructure , nanorod , current density , chemical engineering , nanoparticle , nanotechnology , cobalt oxide , cobalt , crystallography , electrochemistry , chemistry , metallurgy , electrode , physics , quantum mechanics , engineering
Hybrid nanostructures of amorphous cobalt oxide (Co 3 O 4 ) and crystalline gold nanoparticles (AuNPs) showed strongly enhanced OER activity compared to pure amorphous Co 3 O 4 . Particularly, gold nanorods (Au NRs) integrated amorphous Co 3 O 4 nanostructures (aCo 3 O 4 /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/cm 2 , respectively. Further, aCo 3 O 4 /Au NRs displayed good stability over 40 h at 336 mV.