Nitrogen-Doped Carbon Derived from Metal Organic Frameworks (ZIF67) Modified Electrochemically with Non-precious Metal Nanoparticles: Synthesis and Application for Oxygen Evolution Reaction

Here, a general method for fabricating active electrocatalysts is introduced for oxygen evolution reaction (OER) based on multimetallic (ternary alloy) structures formed on the N-doped nanoporous carbon platform without using ruthenium or iridium. Accordingly, three different sizes, small, medium, a...

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Bibliographic Details
Published in:Electrocatalysis 2024, Vol.15 (1), p.29-41
Main Authors: Torabi, Mostafa, Shahrokhi, Seyed Mahdi, Karimi Shervedani, Reza
Format: Article
Language:English
Subjects:
Argon
Carbon
Catalysis
Chemistry
Chemistry and Materials Science
Cobalt
Electrocatalysts
Electrochemistry
Energy Systems
Iridium
Metal-organic frameworks
Nanoalloys
Nanoparticles
Nitrogen
Oxygen evolution reactions
Physical Chemistry
Pyrolysis
Recarburizing
Ruthenium
Synergistic effect
Ternary alloys
Zeolites
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Summary:Here, a general method for fabricating active electrocatalysts is introduced for oxygen evolution reaction (OER) based on multimetallic (ternary alloy) structures formed on the N-doped nanoporous carbon platform without using ruthenium or iridium. Accordingly, three different sizes, small, medium, and large, of cobalt zeolitic imidazolate framework-67 (ZIF67 X , X: S, M, L ) are synthesized. Then, the product is carbonized via direct pyrolysis at 800 °C in an argon atmosphere to yield nitrogen-doped nanoporous carbon composited with cobalt nanoparticles (PZIF67 X 800 ). To improve the activity, the most active nanoporous system for OER (PZIF67 L 800 ) is further modified by electrochemical deposition of Co, Ni, and Fe (PZIF67 L 800 -CoNiFe). The electrochemical results revealed a large electrocatalytic activity for the GC-PZIF67 L 800 -CoNiFe toward the OER in alkaline media, Tafel slopes of 72 mV dec −1 and overpotentials of 314 mV at 30 mA cm −2  (η 30 ), compared with those obtained under the same conditions on GC-RuO 2 (99 mV dec −1 and 499 mV). The improved activity is attributed to (i) the increase in active surface area and simultaneous formation of Co nanoparticles and nitrogen-doped porous carbon, causing uniformly dispersed metal nanoparticles in the composite, and (ii) synergistic effect between the ingredients of ternary alloy nanoparticles (CoNiFe-NPs) and nitrogen-doped carbon nanoporous platform. Graphical Abstract
ISSN:1868-2529
1868-5994
DOI:10.1007/s12678-023-00848-5