Iron(II)-Terpyridine Complex as a Single-Atom Electrocatalyst for Enhanced Oxygen Electrocatalysis: Experimental and Theoretical Insights

IF 2.8 4区化学 Q3 CHEMISTRY, PHYSICAL

Electrocatalysis Pub Date : 2025-07-14 DOI:10.1007/s12678-025-00969-z

Amit Chauhan, Bhagirath Saini, Alok Kumar Singh, Surya Prakash Rai, Sushil Kumar, Shivangi Singh, Rajesh K. Yadav, U. N. Tripathi, Sumit Kumar, Navneet Kumar Gupta

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Abstract

In this study, an optically active iron(II)-terpyridine complex (Fe-pt) has been successfully prepared and characterized by different physicochemical methods. Its electrocatalytic performance for the oxygen evolution reaction (OER) was assessed by immobilizing Fe-pt onto Ni-foam electrodes. The system exhibited an overpotential of ~ 270 mV at 10 mA cm⁻², demonstrating excellent catalytic efficiency under alkaline conditions. Cyclic voltammetry (CV) and chronopotentiometry, confirmed its remarkable stability and OER activity. Structural and spectroscopic analyses revealed that the Ni-foam substrate enhances electron transport and provides robust support, further boosting the catalytic performance. Additionally a strong correlation could be observed between theoretical predictions and experimentally obtained structural and spectral changes during the catalytic process. This study highlights the potential of mononuclear Fe-pt complex as durable electrocatalyst for OER applications.

Graphical Abstract

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铁(II)-三联吡啶配合物作为单原子电催化剂用于增强氧电催化：实验和理论见解

本研究成功制备了一种旋光性铁(II)-三吡啶配合物（Fe-pt），并用不同的物理化学方法对其进行了表征。通过将Fe-pt固定在泡沫镍电极上，考察了Fe-pt对析氧反应的电催化性能。该体系在10 mA cm - 2下的过电位为~ 270 mV，在碱性条件下表现出良好的催化效率。循环伏安法（CV）和时电位法证实了其良好的稳定性和OER活性。结构和光谱分析表明，泡沫镍基板增强了电子传递，提供了强大的支撑，进一步提高了催化性能。此外，在催化过程中，理论预测和实验得到的结构和光谱变化之间存在很强的相关性。本研究强调了单核Fe-pt配合物作为OER应用的耐用电催化剂的潜力。图形抽象

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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来源期刊

Electrocatalysis CHEMISTRY, PHYSICAL-ELECTROCHEMISTRY

CiteScore

4.80

自引率

6.50%

发文量

审稿时长

>12 weeks

期刊介绍： Electrocatalysis is cross-disciplinary in nature, and attracts the interest of chemists, physicists, biochemists, surface and materials scientists, and engineers. Electrocatalysis provides the unique international forum solely dedicated to the exchange of novel ideas in electrocatalysis for academic, government, and industrial researchers. Quick publication of new results, concepts, and inventions made involving Electrocatalysis stimulates scientific discoveries and breakthroughs, promotes the scientific and engineering concepts that are critical to the development of novel electrochemical technologies. Electrocatalysis publishes original submissions in the form of letters, research papers, review articles, book reviews, and educational papers. Letters are preliminary reports that communicate new and important findings. Regular research papers are complete reports of new results, and their analysis and discussion. Review articles critically and constructively examine development in areas of electrocatalysis that are of broad interest and importance. Educational papers discuss important concepts whose understanding is vital to advances in theoretical and experimental aspects of electrochemical reactions.