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ZIF-12/Fe-Cu LDH Composite as a High Performance Electrocatalyst for Water Oxidation
Catalysis and Nanomaterials Lab 27, Department of Chemistry, Quaid-i-Azam University, Islamabad, Pakistan.
Catalysis and Nanomaterials Lab 27, Department of Chemistry, Quaid-i-Azam University, Islamabad, Pakistan.
Catalysis and Nanomaterials Lab 27, Department of Chemistry, Quaid-i-Azam University, Islamabad, Pakistan.
Catalysis and Nanomaterials Lab 27, Department of Chemistry, Quaid-i-Azam University, Islamabad, Pakistan; Department of Biological Sciences, National University of Medical Sciences, Rawalpindi, Pakistan.
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2021 (English)In: Frontiers in Chemistry, E-ISSN 2296-2646, Vol. 9, article id 686969Article in journal (Refereed) Published
Abstract [en]

Layered double hydroxides (LDH) are being used as electrocatalysts for oxygen evolution reactions (OERs). However, low current densities limit their practical applications. Herein, we report a facile and economic synthesis of an iron-copper based LDH integrated with a cobalt-based metal-organic framework (ZIF-12) to form LDH-ZIF-12 composite (1) through a co-precipitation method. The as-synthesized composite 1 requires a low overpotential of 337 mV to achieve a catalytic current density of 10 mA cm−2 with a Tafel slope of 89 mV dec−1. Tafel analysis further demonstrates that 1 exhibits a slope of 89 mV dec−1 which is much lower than the slope of 284 mV dec−1 for LDH and 172 mV dec−1 for ZIF-12. The slope value of 1 is also lower than previously reported electrocatalysts, including Ni-Co LDH (113 mV dec−1) and Zn-Co LDH nanosheets (101 mV dec−1), under similar conditions. Controlled potential electrolysis and stability test experiments show the potential application of 1 as a heterogeneous electrocatalyst for water oxidation.

Place, publisher, year, edition, pages
Frontiers Media S.A., 2021. Vol. 9, article id 686969
Keywords [en]
composite, co-precipitation, electrocatalysts, water oxidation, tafel analysis
National Category
Materials Chemistry
Research subject
Chemistry of Interfaces
Identifiers
URN: urn:nbn:se:ltu:diva-85987DOI: 10.3389/fchem.2021.686968ISI: 000670571400001PubMedID: 34249860Scopus ID: 2-s2.0-85109368798OAI: oai:DiVA.org:ltu-85987DiVA, id: diva2:1573182
Note

Validerad;2021;Nivå 2;2021-07-15 (johcin);

Finansiär: Higher Education Commission (HEC) of Pakistan (8400/Federal/NRPU/R&D/HEC/2017)

Available from: 2021-06-24 Created: 2021-06-24 Last updated: 2021-08-17Bibliographically approved

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Khan, Inayat

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