Facile fabrication of CdAl2O4 adorned on polyaniline for improving oxygen evolution process in basic media

IF 1.7 4区化学 Q3 CHEMISTRY, INORGANIC & NUCLEAR

Transition Metal Chemistry Pub Date : 2025-05-05 DOI:10.1007/s11243-025-00651-9

Iqra Bibi, Samira Elaissi, Tahani Rahil Aldhafeeri, Syed Kashif Ali, Kiran Tahir, Abhinav Kumar

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引用次数: 0

Abstract

Considering environmental issues, which involve climate change and shortage of hydrocarbon resources, the usage of environmentally friendly technologies in energy generation has become essential worldwide. In this regard, water splitting is the best way of renewable energy source. Developing an efficient, high-performance and robust electrocatalyst became a significant goal to improve water splitting. For this purpose, we fabricated CdAl₂O₄@PANI (CAO@PANI) composite via hydrothermal approach for oxygen evolution reaction (OER). The CAO@PANI displayed varied morphologies, including nanoparticles of CAO affixed to PANI sheets, which enhance the surface area for adsorption of electrolyte ions. The electrocatalyst based on CAO@PANI nanostructure has enhanced efficiency relative to CAO as indicated by overpotential (η) of 192 mV at 10 mA/cm² j (current density) and remarkable durability (50 h). Additionally, CAO@PANI nanostructure exhibits an excellent Tafel plot (36 mV/dec) along with reduced charge transfer resistance (R_ct = 3.4 Ω). The fabricated catalyst also demonstrated notable double-layer capacitance (C_dl = 48 mF/cm²) and greater electrochemically active surface area (ECSA = 1200 cm²). The excellent outcomes may be associated to the combined effect of CAO and PANI, which has a distinctive π-conjugated framework and a variety of nitrogen species with lone pairs of electrons. This configuration facilitates a steady flow of OH⁻ ion and enhances its adsorption capacity on the surface of CAO@PANI, making it a remarkably effective and reliable catalyst for OER.

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聚苯胺修饰CdAl2O4改善碱性介质中析氧过程的简易制备

考虑到气候变化和碳氢化合物资源短缺等环境问题，在世界范围内使用环境友好型技术发电已变得至关重要。在这方面，水分解是可再生能源的最佳途径。开发一种高效、高性能、坚固耐用的电催化剂成为改善水分解的重要目标。为此，我们通过水热法制备了CdAl2O4@PANI （CAO@PANI）复合材料，用于氧析反应（OER）。CAO@PANI显示出多种形态，包括粘接在聚苯胺片上的CAO纳米颗粒，这增加了电解质离子吸附的表面积。基于CAO@PANI纳米结构的电催化剂在10 mA/cm2 j（电流密度）下的过电位（η）为192 mV，耐久性（50 h）显著提高了效率。此外，CAO@PANI纳米结构表现出优异的Tafel图（36 mV/dec）和降低的电荷转移电阻（Rct = 3.4 Ω）。制备的催化剂还具有显著的双层电容（Cdl = 48 mF/cm2）和较大的电化学活性表面积（ECSA = 1200 cm2）。这种优异的结果可能与CAO和聚苯胺的共同作用有关，聚苯胺具有独特的π共轭框架和多种具有孤对电子的氮种。这种结构有利于OH−离子在CAO@PANI表面的稳定流动，提高了OH−离子在CAO@PANI表面的吸附能力，是一种非常有效和可靠的OER催化剂。

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

Transition Metal Chemistry 化学-无机化学与核化学

CiteScore

3.60

自引率

0.00%

发文量

审稿时长

1.3 months

期刊介绍： Transition Metal Chemistry is an international journal designed to deal with all aspects of the subject embodied in the title: the preparation of transition metal-based molecular compounds of all kinds (including complexes of the Group 12 elements), their structural, physical, kinetic, catalytic and biological properties, their use in chemical synthesis as well as their application in the widest context, their role in naturally occurring systems etc. Manuscripts submitted to the journal should be of broad appeal to the readership and for this reason, papers which are confined to more specialised studies such as the measurement of solution phase equilibria or thermal decomposition studies, or papers which include extensive material on f-block elements, or papers dealing with non-molecular materials, will not normally be considered for publication. Work describing new ligands or coordination geometries must provide sufficient evidence for the confident assignment of structural formulae; this will usually take the form of one or more X-ray crystal structures.