期刊
ULTRASONICS SONOCHEMISTRY
卷 14, 期 4, 页码 405-412出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.ultsonch.2006.08.006
关键词
hydrogen peroxide; sono-electrochemistry; reticulated vitreous glassy carbon; green synthesis
The electrosynthesis of hydrogen peroxide using the oxygen reduction reaction has been studied in the absence and presence of power ultrasound in a non-optimized sono-electrochemical flow reactor (20 cm cathodic compartment length with 6.5 cm inner diameter) with reticulated vitreous glassy carbon electrode (30 x 40 x 10 mm, 10 ppi, 7 cm(2) cm(-3)) as the cathode. The effect of several electrochemical operational variables (pH, volumetric flow, potential) and of the sono-electrochemical parameters (ultrasound amplitude and horn-to-electrode distance) on the cumulative concentration of hydrogen peroxide and current efficiency of the electrosynthesis process have been explored. The application of power ultrasound was found to increase both the cumulative concentration of hydrogen peroxide and the current efficiency. The application of ultrasound is therefore a promising approach to the increased efficiency of production of hydrogen peroxide by electrosynthesis, even in the solutions of lower pH (< 12). The results demonstrate the feasibility of at-site-of-use green synthesis of hydrogen peroxide. (c) 2006 Elsevier B.V. All rights reserved.
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