共价电子-质子转移介质在氧还原反应中的反作用

IF 3.3 3区化学 Q2 CHEMISTRY, INORGANIC & NUCLEAR

Dalton Transactions Pub Date : 2025-09-19 DOI:10.1039/d5dt01227a

Anjila I. Siddiqui, Sanyam ., Rupesh Nain, Anirban Mondal, Biswajit Mondal

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引用次数: 0

摘要

本研究将BQ/H2Q电子-质子转移介体（EPTM）共价附着在salophen配体（Sal-H2Q）上，并将其铁配合物Fe（Sal-H2Q）与不含EPTM的铁的salophen配合物在乙腈中以乙酸作为外质子源，比较其ORR活性。发现Fe（Sal）的ORR率要高得多，峰值电流为222µa，而Fe（Sal- h2q）的ORR率在相似电位下为115µa。选择性测量表明，这两种催化剂都表现出选择性的水生成。这一观察结果也适用于其他溶剂体系。本研究结果与BQ/H2Q EPTM的共价附着增强ORR反应性的一般观察结果相反。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Inverse Effect of Covalently Attached Electron-Proton Transfer Mediator in Oxygen Reduction Reaction

In this work, the BQ/H2Q electron-proton-transfer mediator (EPTM) was covalently attached to the salophen ligand (Sal-H2Q), and its iron complex Fe(Sal-H2Q) was compared for ORR activity with the salophen complex of iron without the EPTM, using acetic acid as the external proton source in acetonitrile. The rate of ORR was found to be much higher for Fe(Sal), giving a peak current of 222 µA, while for Fe(Sal-H2Q) it was 115 µA at a similar potential. Selectivity measurements revealed that both catalysts show selective water formation. This observation holds for other solvent systems as well. The findings in this study are contrary to the general observation that covalent attachment of BQ/H2Q EPTM enhances the ORR reactivity.

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来源期刊

Dalton Transactions 化学-无机化学与核化学

CiteScore

6.60

自引率

7.50%

发文量

1832

审稿时长

1.5 months

期刊介绍： Dalton Transactions is a journal for all areas of inorganic chemistry, which encompasses the organometallic, bioinorganic and materials chemistry of the elements, with applications including synthesis, catalysis, energy conversion/storage, electrical devices and medicine. Dalton Transactions welcomes high-quality, original submissions in all of these areas and more, where the advancement of knowledge in inorganic chemistry is significant.