Oxidised charcoal: an efficient support for NiFe layered double hydroxide to improve electrochemical oxygen evolution

We report the facile synthesis of oxidised charcoal supported NiFeLDH (NiFeLDH/OC) at room temperature. It showed unprecedented activity in the oxygen evolution reaction with an overpotential of 240 mV at 10 mA cm −2 , which is ∼115 mV less than pure NiFeLDH. The electronic enrichment at the metal s...

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Published inChemical communications (Cambridge, England) Vol. 56; no. 62; pp. 877 - 8773
Main Authors Saha, Jony, Kumar, Ashok, PM, Anjana, Jakhad, Vikash
Format Journal Article
LanguageEnglish
Published Cambridge Royal Society of Chemistry 04.08.2020
Subjects
Charcoal
Electrochemical analysis
Iron compounds
Nickel compounds
Oxygen evolution reactions
Room temperature
X ray photoelectron spectroscopy
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Summary:We report the facile synthesis of oxidised charcoal supported NiFeLDH (NiFeLDH/OC) at room temperature. It showed unprecedented activity in the oxygen evolution reaction with an overpotential of 240 mV at 10 mA cm −2 , which is ∼115 mV less than pure NiFeLDH. The electronic enrichment at the metal sites and enhanced surface area of NiFeLDH/OC are reasons for the improved activity. NiFeLDH/oxidised charcoal showed excellent activity in the oxygen evolution reaction with an overpotential of 240 mV at 10 mA cm −2 , which is ∼115 mV less than that of NiFeLDH.
Bibliography:Electronic supplementary information (ESI) available: Experimental details (S2-S4), additional figures (S5-S13), electrochemical analysis, literature reports (S14-S19), and XPS analysis (S20). See DOI
10.1039/d0cc02880k
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ISSN:1359-7345
1364-548X
DOI:10.1039/d0cc02880k