TY - JOUR
T1 - Magnetic CoPt nanoparticle-decorated ultrathin Co(OH)2 nanosheets
T2 - An efficient bi-functional water splitting catalyst
AU - Malik, Bibhudatta
AU - Anantharaj, S.
AU - Karthick, K.
AU - Pattanayak, Deepak K.
AU - Kundu, Subrata
N1 - Funding Information:
The authors of this study acknowledge the kind support and encouragement extended by Dr. Vijayamohanan K. Pillai, Director, CSIR-CECRI. B. M. and D. K. P. would like to acknowledge the funding provided through MULTIFUN. S. A. and K. K. acknowledge the CSIR-New Delhi, and UGC-New Delhi for senior and junior research fellowship (SRF/JRF) awards, respectively. The authors also wish to acknowledge all the faculty of the central instrumentation facility (CIF), CSIR-CECRI, Karaikudi.
Publisher Copyright:
© The Royal Society of Chemistry 2017.
PY - 2017
Y1 - 2017
N2 - Hydrogen generation via electrocatalytic water splitting is on the cutting edge of energy research. The kinetic burdens associated with the sluggish anodic oxygen evolution reaction (OER) and cathodic hydrogen evolution reaction (HER) cause a large amount of energy loss. Hence, these reactions must be catalyzed. Therefore, an array of magnetic CoPt nanoparticle (NP)-decorated ultrathin Co(OH)2 nanosheets was synthesized and applied for electrocatalytic water splitting in 1 M KOH. CoPt@Co(OH)2 required a minimum overpotential of 334 mV at 10 mA cm-2 in the OER and 226 mV at 50 mA cm-2 in the HER in addition to possessing exceptional stability upon cycling and chronoamperometry. The advantages of the magnetic property of CoPt@Co(OH)2 have been utilized for the first time to improve its stability. The aging study carried out at the CoPt@Co(OH)2-modified interface with and without magnetic support has shown that the magnetically co-stabilized interface was more stable even after 5 days of aging in 1 M KOH. This magnetism-assisted enhancement in the stability of a nanocatalyst-modified interface along with proper further developments will surely take the electrocatalysis of water splitting to a new level.
AB - Hydrogen generation via electrocatalytic water splitting is on the cutting edge of energy research. The kinetic burdens associated with the sluggish anodic oxygen evolution reaction (OER) and cathodic hydrogen evolution reaction (HER) cause a large amount of energy loss. Hence, these reactions must be catalyzed. Therefore, an array of magnetic CoPt nanoparticle (NP)-decorated ultrathin Co(OH)2 nanosheets was synthesized and applied for electrocatalytic water splitting in 1 M KOH. CoPt@Co(OH)2 required a minimum overpotential of 334 mV at 10 mA cm-2 in the OER and 226 mV at 50 mA cm-2 in the HER in addition to possessing exceptional stability upon cycling and chronoamperometry. The advantages of the magnetic property of CoPt@Co(OH)2 have been utilized for the first time to improve its stability. The aging study carried out at the CoPt@Co(OH)2-modified interface with and without magnetic support has shown that the magnetically co-stabilized interface was more stable even after 5 days of aging in 1 M KOH. This magnetism-assisted enhancement in the stability of a nanocatalyst-modified interface along with proper further developments will surely take the electrocatalysis of water splitting to a new level.
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U2 - 10.1039/c7cy00309a
DO - 10.1039/c7cy00309a
M3 - Article
AN - SCOPUS:85022188046
SN - 2044-4753
VL - 7
SP - 2486
EP - 2497
JO - Catalysis Science and Technology
JF - Catalysis Science and Technology
IS - 12
ER -
