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Self-assembled 3D hierarchical MnCO3/NiFe layered double hydroxides as a superior electrocatalysts for the oxygen evolution reactions.

Authors
  • Rajendiran, Rajmohan1
  • Muthuchamy, Nallal2
  • Park, Kang Hyun2
  • Li, Oi Lun3
  • Kim, Hee-Je1
  • Prabakar, Kandasamy4
  • 1 Department of Electrical Engineering, Pusan National University, 2 Busandaehak-ro 63beon-gil, Geumjeong-gu, Busan 46241, Republic of Korea. , (North Korea)
  • 2 Department of Chemistry, Pusan National University, 2 Busandaehak-ro 63beon-gil, Geumjeong-gu, Busan 46241, Republic of Korea. , (North Korea)
  • 3 School of Materials Science and Engineering, Pusan National University, 2 Busandaehak-ro 63beon-gil, Geumjeong-gu, Busan 46241, Republic of Korea. Electronic address: [email protected] , (North Korea)
  • 4 Department of Electrical Engineering, Pusan National University, 2 Busandaehak-ro 63beon-gil, Geumjeong-gu, Busan 46241, Republic of Korea. Electronic address: [email protected] , (North Korea)
Type
Published Article
Journal
Journal of Colloid and Interface Science
Publisher
Elsevier
Publication Date
Apr 15, 2020
Volume
566
Pages
224–233
Identifiers
DOI: 10.1016/j.jcis.2020.01.086
PMID: 32006818
Source
Medline
Keywords
Language
English
License
Unknown

Abstract

Developing cost-effective and efficient oxygen evolution reaction (OER) electrocatalyst is highly essential for energy-conversion technologies. A self-assembled NiFe-layered double hydroxide (LDH)@MnCO3 heterostructure prepared on Ni foam using a successive hydrothermal strategy shows notable catalytic activity toward the OER with a small overpotential of 275 mV to drive a geometrical current density of 10 mA cm-2 under alkaline conditions with remarkable stability for 15 h, outperforming IrO2/C electrocatalyst (350 [email protected] mA cm-2). The hierarchical [email protected] heterostructure possess more exposed active sites, enhanced conductivity and superior interfacial coupling effect makes them an ideal candidate for OER electrocatalyst. Copyright © 2020 Elsevier Inc. All rights reserved.

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