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The influence of the ultrasonic frequency (20kHz, 207kHz, and 615kHz) towards the formation kinetics of H2O2 under Ar and Ar/(20vol.%)O2 atmospheres was evaluated in pure water and aqueous nitric solutions. Results obtained at low frequency ultrasound demonstrate that hydrogen peroxide formation is enhanced under an Ar/O2 gas mixture whatever the sonicated medium. Nevertheless, H2O2 yields are higher...
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