Kerschbaumer Angelina, Wielend Dominik, Leeb Elisabeth, Schimanofsky Corina, Kleinbruckner Nadine, Neugebauer Helmut, Irimia-Vladu Mihai, Sariciftci Niyazi Serdar
Linz Institute for Organic Solar Cells (LIOS), Institute of Physical Chemistry, Johannes Kepler University Linz Altenberger Straße 69 4040 Linz Austria
Catal Sci Technol. 2022 Dec 23;13(3):834-843. doi: 10.1039/d2cy01744j. eCollection 2023 Feb 6.
When studying electrochemical oxygen reduction reactions in homogeneous media, special attention must be given to the significant background activity present with conventional electrode materials. The intrinsic electrocatalytic activity of different materials can be investigated using complementary methods, such as the rotating ring-disc electrode (RRDE) technique and chronoamperometric electrolysis with product quantification. This report presents a detailed investigation of the electrocatalytic ability of hydroxy anthraquinone derivatives and riboflavin towards hydrogen peroxide (HO) production a novel RRDE subtraction method together with chronoamperometric electrolysis. Qualitative trends linking the two methods were obtained, such as a higher excess current correlating with both higher productivity and selectivity. As such, a valuable tool is provided to increase the understanding of the electrocatalytic ability of homogeneous solutions toward improving the oxygen reduction reaction.
在研究均相介质中的电化学氧还原反应时，必须特别关注传统电极材料所呈现的显著背景活性。可以使用互补方法，如旋转环盘电极（RRDE）技术和具有产物定量的计时电流电解法，来研究不同材料的固有电催化活性。本报告介绍了一种新颖的RRDE减法方法以及计时电流电解法，对羟基蒽醌衍生物和核黄素对过氧化氢（HO）生成的电催化能力进行了详细研究。获得了将这两种方法联系起来的定性趋势，例如较高的过电流与较高的生产率和选择性相关。因此，提供了一个有价值的工具，以增进对均相溶液改善氧还原反应的电催化能力的理解。
