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6CCVD Research

Enhanced H2O2 Production at Reductive Potentials from Oxidized Boron-Doped Ultrananocrystalline Diamond Electrodes

At a Glance

Section titled ā€œAt a Glanceā€
MetadataDetails
Publication Date2017-05-04
JournalACS Applied Materials & Interfaces
AuthorsJames O. Thostenson, Edgard Ngaboyamahina, Katelyn L. Sellgren, Brian T. Hawkins, Jeffrey R. Piascik
InstitutionsRTI International
Citations39

Abstract

Section titled ā€œAbstractā€

This work investigates the surface chemistry of H<sub>2</sub>O<sub>2</sub> generation on a boron-doped ultrananocrystalline diamond (BD-UNCD) electrode. It is motivated by the need to efficiently disinfect liquid waste in resource constrained environments with limited electrical power. X-ray photoelectron spectroscopy was used to identify functional groups on the BD-UNCD electrode surfaces while the electrochemical potentials of generation for these functional groups were determined via cyclic voltammetry, chronocoulometry, and chronoamperometry. A colorimetric technique was employed to determine the concentration and current efficiency of H<sub>2</sub>O<sub>2</sub> produced at different potentials. Results showed that preanodization of an as-grown BD-UNCD electrode can enhance the production of H<sub>2</sub>O<sub>2</sub> in a strong acidic environment (pH 0.5) at reductive potentials. It is proposed that the electrogeneration of functional groups at oxidative potentials during preanodization allows for an increased current density during the successive electrolysis at reductive potentials that correlates to an enhanced production of H<sub>2</sub>O<sub>2</sub>. Through potential cycling methods, and by optimizing the applied potentials and duty cycle, the functional groups can be stabilized allowing continuous production of H<sub>2</sub>O<sub>2</sub> more efficiently compared to static potential methods.

Tech Support

Section titled ā€œTech Supportā€

Original Source

Section titled ā€œOriginal Sourceā€

References

Section titled ā€œReferencesā€
  1. 2006 - WHO Guidlines for the Safe Use of Wastewater, Excreta and Greywater

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