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Hydrogen peroxide electrogeneration in gas diffusion electrode nanostructured with Ta2O5

Paper ID Volume ID Publish Year Pages File Format Full-Text
39102 45806 2016 7 PDF Available
Title
Hydrogen peroxide electrogeneration in gas diffusion electrode nanostructured with Ta2O5
Abstract

•Ta2O5 nanoparticles on carbon black were prepared by thermal decomposition of a polymeric precursor solution.•Gas diffusion electrodes were constructed using carbon black either unmodified or modified with Ta2O5 nanoparticles.•Ta2O5/C electrode has high electroactivity for ORR and selectivity for H2O2.•Ta2O5/C electrode is promising candidate to use in advanced oxidative processes.

Highly efficient H2O2 electrogeneration is required in the Advanced Oxidation Process for organic wastewater treatment. However, the development of more efficient catalytic particles used in gas diffusion electrodes (GDEs) to enable the oxygen reduction reaction through two-electron transfer is still of great importance. The performance of the Ta2O5 nanoparticles on carbon black in catalyzing the ORR was evaluated using rotating ring-disk electrode. The current efficiency for H2O2 electrogeneration on Ta2O5/C catalyst is 83.2% whereas carbon black exhibits 65.3%. GDEs were constructed using carbon black either unmodified or modified with Ta2O5 nanoparticles. The modified GDE produces 27.9 mg L−1 of H2O2, while the unmodified GDE generates 19.1 mg L−1 of H2O2. Furthermore, the energy consumption for the H2O2 electrogeneration is lower in modified than in unmodified GDE (15.0 kW h vs. 18.8 kW h). The high performance of the GDE (Ta2O5/C) renders it a viable alternative cathode in the electrochemical treatment of wastewaters.

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Keywords
Tantalum oxide; Oxygen reduction reaction; Hydrogen peroxide electrogeneration; Gas diffusion electrode
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 517, 5 May 2016, Pages 161–167
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us