Electrocatalytic oxygen reduction at non-metalated and pyrolysis free hypercrosslinked polymers

IF 4.7 3区工程技术 Q2 ELECTROCHEMISTRY

Electrochemistry Communications Pub Date : 2024-09-01 DOI:10.1016/j.elecom.2024.107800

Shumaila Razzaque, Alla Dyachenko, Aimen Waqar, Katarzyna Dusilo, Marcin Opallo

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Abstract

Oxygen reduction is one of the core steps of non-emissive zero carbon energy conversion. Therefore, enhancement of its sluggish kinetics is extremely important. Very recently researchers focused on oxygen electrocatalysis at porous polymers. Here we applied the non-metalated and pyrolysis free hypercrosslinked polymers with high specific surface area and abundant active sites. Electrode modified with the copolymer prepared from the twisted triphenylbenzene and N containing triphenyl amine exhibits electrocatalytic ORR in alkaline medium. Tafel slope value (0.067 V dec⁻¹) indicates the efficient electrocatalytic activity and fast reaction kinetics. The lack of H₂O₂ product detected by scanning electrochemical microscopy suggests 4-electron path. The electrocatalytic activity of electrodes modified with hypercrosslinked polymers prepared from single monomers is also seen.

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非金属化和无热解超交联聚合物的电催化氧还原作用

氧还原是非辐射零碳能源转换的核心步骤之一。因此，提高其缓慢的动力学极为重要。最近，研究人员重点研究了多孔聚合物的氧电催化。在这里，我们应用了具有高比表面积和丰富活性位点的无金属化、无热解的超交联聚合物。在碱性介质中，使用由扭曲的三苯基苯和含 N 的三苯基胺制备的共聚物修饰的电极表现出电催化 ORR。塔菲尔斜率值（0.067 V dec-1）表明电极具有高效的电催化活性和快速的反应动力学。扫描电化学显微镜检测不到 H2O2 产物，这表明存在 4 电子路径。用单一单体制备的超交联聚合物修饰的电极也具有电催化活性。

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来源期刊

Electrochemistry Communications 工程技术-电化学

CiteScore

8.50

自引率

3.70%

发文量

160

审稿时长

1.2 months

期刊介绍： Electrochemistry Communications is an open access journal providing fast dissemination of short communications, full communications and mini reviews covering the whole field of electrochemistry which merit urgent publication. Short communications are limited to a maximum of 20,000 characters (including spaces) while full communications and mini reviews are limited to 25,000 characters (including spaces). Supplementary information is permitted for full communications and mini reviews but not for short communications. We aim to be the fastest journal in electrochemistry for these types of papers.