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Electrocatalysis of Hydrogen Peroxide Generation Using Oxygen-Fed Gas Diffusion Electrodes Made of Carbon Black Modified with Quinone Compounds
Electrocatalysis ( IF 2.7 ) Pub Date : 2020-03-02 , DOI: 10.1007/s12678-020-00591-1
Robson S. Rocha , Ricardo B. Valim , Leandro C. Trevelin , Juliana R. Steter , Jussara F. Carneiro , Juliane C. Forti , Rodnei Bertazzoli , Marcos R. V. Lanza

Hydrogen peroxide (H2O2) is one of the most popular and widely used oxidants. Among the wide range of synthesis techniques used for the production of H2O2; the electrochemical method allows the use of gas diffusion electrodes to generate H2O2 without limiting the low solubility of O2 in water. The present work reports the modification of carbon black with quinone, where the generation of H2O2 occurs in an electrochemical/chemical mechanism. The results obtained by this technique were found to be highly promising. The use of the organic compound 1,2-dihydroxyanthraquinone to modify carbon black electrode resulted in greater production of H2O2. Carbon black electrode modified with 1% of 1,2-dihydroxyanthraquinone yielded 298 mg L−1 of H2O2 at the end of 90 min of experiment, reaching an electrical efficiency of approximately 25.5%. Based on the findings of this study, H2O2 generation is found to be directly associated with the chemical structure of the carbon modifier and not solely related to the presence of quinone groups.

Graphical Abstract



中文翻译:

含醌化合物修饰的炭黑供氧气体扩散电极对过氧化氢的电催化

过氧化氢(H 2 O 2)是最流行和广泛使用的氧化剂之一。在用于生产H 2 O 2的广泛的合成技术中; 电化学方法允许使用气体扩散电极产生H 2 O 2,而不会限制O 2在水中的低溶解度。本工作报告了用醌对炭黑的改性,其中生成了H 2 O 2发生在电化学/化学机理中。发现通过该技术获得的结果非常有前途。使用有机化合物1,2-二羟基蒽醌修饰炭黑电极导致H 2 O 2的产量增加。在90分钟的实验结束时,用1%的1,2-二羟基蒽醌改性的炭黑电极产生298 mg L -1的H 2 O 2,电效率约为25.5%。基于该研究的发现,发现H 2 O 2的产生与碳改性剂的化学结构直接相关,而不仅与醌基团的存在有关。

图形概要

更新日期:2020-04-21
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