Dual-template synthesis of nitrogen-doped carbons spheres supported NiFe alloys towards improved electrocatalytic oxygen evolution

IF 5.4 3区化学 Q1 CHEMISTRY, INORGANIC & NUCLEAR

Inorganic Chemistry Communications Pub Date : 2025-09-23 DOI:10.1016/j.inoche.2025.115562

Huipeng Xu , Yao Shen , Shengyi Huang , Aihua Yuan , Hu Zhou

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Abstract

The development of transition metal/alloy materials has shown a promising prospect as the catalysts for electrochemical oxygen evolution reaction (OER). However, it is quite challenging to suppress the self-aggregation and promote the catalytic activity for metal nanoparticles (NPs). Decorating metal/alloy species onto nitrogen-doped carbon substrate is a powerful approach to fabricate the strongly-coupled nanohybrids. Herein, N-doped carbon spheres supported NiFe alloy nanoparticles (NiFe@NCS) are prepared through in-situ growth of NiFe-PBA nanocrystals on polydopamine (PDA) spheres, followed by a high-temperature pyrolysis. Thanks to the synergistic effect of hierarchical pore structure, high electronic conductivity, and plentifully active sites, the as-formed NiFe@NCS exhibits a low overpotential of 290 mV at a current density of 10 mA cm⁻² as well as displays a superb cycling stability for OER. In addition, the best catalytic activity has been realized for the NiFe@NCS sample with a moderate loading of NiFe NPs. This study affords a feasible dual-template method for fabricating efficient electrocatalysts of N-doped carbon-supported metal/alloy species.

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氮掺杂碳球负载NiFe合金的双模板合成及其电催化析氧性能

过渡金属/合金材料作为电化学析氧反应（OER）的催化剂具有广阔的发展前景。然而，抑制金属纳米颗粒的自聚集并提高其催化活性是一项具有挑战性的工作。在氮掺杂碳衬底上修饰金属/合金是制备强耦合纳米杂化材料的有效方法。本文通过在聚多巴胺（PDA）球上原位生长nfe - pba纳米晶体，并进行高温热解，制备了n掺杂碳球负载的NiFe合金纳米颗粒（NiFe@NCS）。由于层次化孔隙结构、高电子导电性和丰富的活性位点的协同作用，形成的NiFe@NCS在电流密度为10 mA cm−2时表现出290 mV的低过电位，并表现出极好的OER循环稳定性。此外，适度负载NiFe NPs的NiFe@NCS样品具有最佳的催化活性。本研究为制备n掺杂碳负载金属/合金的高效电催化剂提供了一种可行的双模板方法。

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

Inorganic Chemistry Communications 化学-无机化学与核化学

CiteScore

5.50

自引率

7.90%

发文量

1013

审稿时长

53 days

期刊介绍： Launched in January 1998, Inorganic Chemistry Communications is an international journal dedicated to the rapid publication of short communications in the major areas of inorganic, organometallic and supramolecular chemistry. Topics include synthetic and reaction chemistry, kinetics and mechanisms of reactions, bioinorganic chemistry, photochemistry and the use of metal and organometallic compounds in stoichiometric and catalytic synthesis or organic compounds.