Insights into the enhancement of oxygen evolution catalysis in Ce-mediated amorphous CoFe-based (oxy)hydroxide

IF 3.3 3区化学 Q2 CHEMISTRY, INORGANIC & NUCLEAR

Dalton Transactions Pub Date : 2025-09-12 DOI:10.1039/d5dt01962a

Ji-Dong Song, Hao Hu, Jian-Li Mi, Fu-Ming Qi, Beibei Xiao, Zhizhong Yuan

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引用次数: 0

Abstract

Heteroatom doping and nanostructure engineering are recognized as pivotal strategies for enhancing the oxygen evolution reaction (OER) performance of layered double hydroxides (LDHs) and (oxy)hydroxides. However, the reason of performance improvement remains controversial. Herein, we report a Ce-incorporated amorphous CoFe-(oxy)hydroxide nanoparticles on nickel foam (NF) via a one-step electrodeposition method, achieving excellent OER activity with a low overpotential (η = 0.220 V at 10 mA cm-2 in 1.0 M KOH), ranking among the top-performing CoFe-based OER catalysts. Intriguingly, despite that Ce incorporation can reduce the overpotential of CoFe-(oxy)hydroxide, the intrinsic activity and the reaction kinetics are suppressed through Ce incorporation. Instead, the enhancement of OER activity primarily stems from the small particle size and the fast charge transfer. Ce incorporation suppresses the particle coalescence during synthesis, thereby increasing the electrochemically active surface area. In addition, Ce incorporation modulates the interfacial charge-transfer resistance effectively. This work highlights a method for designing high-performance OER catalysts through morphological engineering and electric conductivity modulation.

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ce介导的无定形cofe基（氧）氢氧化物中析氧催化的增强研究

杂原子掺杂和纳米结构工程被认为是提高层状双氢氧化物（LDHs）和（氧）氢氧化物析氧反应（OER）性能的关键策略。然而，绩效改善的原因仍然存在争议。本研究通过一步电沉积方法在泡沫镍（NF）上制备了铈掺杂的无定形CoFe-（氧）氢氧化物纳米颗粒，获得了优异的OER活性和低过电位（1.0 M KOH， 10 mA cm-2时η = 0.220 V），是性能最好的CoFe基OER催化剂之一。有趣的是，尽管Ce掺入可以降低CoFe-（氧）氢氧化物的过电位，但Ce掺入抑制了其固有活性和反应动力学。相反，OER活性的增强主要源于小颗粒尺寸和快速电荷转移。Ce的掺入抑制了合成过程中的粒子聚结，从而增加了电化学活性表面积。此外，铈的掺入能有效地调节界面电荷转移电阻。这项工作强调了一种通过形态工程和电导率调制设计高性能OER催化剂的方法。

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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.