Electroless Plating on Porous Carbon Felts in Redox Flow Batteries and Thickness Effect on the Electrical and Mechanical Properties

BACKGROUND Electrosorption efficiency for uranyl ion (UO22+) capture is low in acid solution due to the adverse effect caused by protons. This requires novel electrodes effective at acid conditions for UO22+ electrosorption in highly acidic industrial effluents such as spent nuclear fuel treatment. RESULTS In the current study, UO22+ electrosorption was conducted using an amidoxime‐modified carbon paper (CP‐AO) electrode. The effects of voltage and frequency, pH, UO22+ initial concentration, and competing ions on UO22+ electrosorption were investigated. The reusability and electrochemical properties of the CP‐AO electrode were studied. The experimental results showed that the current CP‐AO electrode worked well in acidic conditiona (pH = 3) with a square wave periodic voltage (SWPV, −4 V, 1000 Hz), and outperformed a previously used carbon felt‐based electrode. The CP‐AO electrode showed considerable selectivity toward UO22+ in the presence of competitive ions. After seven rounds of continuous electrosorption–desorption, the CP‐AO electrode still showed good UO22+ uptake efficiency. The electrosorption mechanisms were studied in‐depth based on experimental and characterization results. The electrosorption of UO22+ by the CP‐AO electrode was due mainly to the electric field force moving UO22+ to the surface of the electrode, leading to electrodeposition of uranium compounds and the formation of electrically neutral substances. CONCLUSIONS The results indicated that based on SWPV electrosorption the CP‐AO could be a desirable treatment approach for acidic uranium‐containing wastewater with promising practical applications.

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Efficient electrosorption of uranyl ions by a homemade amidoxime‐modified carbon paper‐based electrode in acidic aqueous condition

Pan

Zhang

et al. 2021

J of Chemical Tech & Biotech

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Micro-pillars enhanced all vanadium redox flow batteries and the effect of assembly torque on the electrochemical performance

2016

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Application of carbon materials in redox flow batteries

Chakrabarti

Brandon

Hajimolana

et al. 2014

Journal of Power Sources

297

190

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Electroless Plating on Porous Carbon Felts in Redox Flow Batteries and Thickness Effect on the Electrical and Mechanical Properties

Cited by 4 publications

References 22 publications

Efficient electrosorption of uranyl ions by a homemade amidoxime‐modified carbon paper‐based electrode in acidic aqueous condition

Efficient electrosorption of uranyl ions by a homemade amidoxime‐modified carbon paper‐based electrode in acidic aqueous condition

Micro-pillars enhanced all vanadium redox flow batteries and the effect of assembly torque on the electrochemical performance

Application of carbon materials in redox flow batteries

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