原子分散的 Fe2 和 Ni 基底实现高效持久的氧电催化

IF 16.1 1区 化学 Q1 CHEMISTRY, MULTIDISCIPLINARY
Guiyuan Yang, Meihong Fan, Qing Liang, Prof. Xingquan He, Prof. Wei Zhang, Prof. Tewodros Asefa
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引用次数: 0

摘要

为氧还原反应(ORR)和析氧反应(OER)开发高效、经济、稳定的电催化剂对于可再生燃料电池和可充电金属-空气电池的大规模商业化至关重要。本文开发了一种新的三元原子催化剂,该催化剂由配对的Fe位点和单个Ni位点(如Fe2‐N6和Ni‐N4)配位在空心氮掺杂碳微球上。合成的催化剂在碱性介质中对ORR和OER均表现出显著的活性,其性能优于仅含有Fe2‐N6或Ni‐N4位点的对照材料。密度泛函理论计算和原位红外(IR)光谱研究清楚地表明,Fe2‐N6中心是ORR和OER的活性位点,它们的电催化活性通过Ni‐N4位点对其d波段中心的优化而协同增强。这种三原子催化剂可能是一种有前途的、可替代的、可持续的催化剂,可以替代商业上使用的铂基和钌基催化剂,用于驱动可充电锌空气电池和其他相关应用中的ORR和OER。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Atomically Dispersed Fe2 and Ni Sites for Efficient and Durable Oxygen Electrocatalysis

Atomically Dispersed Fe2 and Ni Sites for Efficient and Durable Oxygen Electrocatalysis

Developing highly efficient, cost-effective, and robust electrocatalysts for the oxygen reduction reaction (ORR) and the oxygen evolution reaction (OER) is paramount for the large-scale commercialization of renewable fuel cells and rechargeable metal-air batteries. Herein, a new ternary-atom catalyst that is composed of paired Fe sites and single Ni sites (as Fe2−N6 and Ni−N4) coordinated onto hollow nitrogen-doped carbon microspheres is developed. The as-synthesized catalyst exhibits remarkable activities toward both the ORR and OER in alkaline media, with superior performances to those of the control materials that contain only Fe2−N6 or Ni−N4 sites. Density functional theory calculations and in situ infrared (IR) spectroscopic studies clearly reveal that the Fe2−N6 centers are the active sites for both ORR and OER, and their electrocatalytic activities are synergistically enhanced through optimization of their d-band centers by the Ni−N4 sites. This ternary-atom catalyst can potentially be a promising, alternative, sustainable catalyst to commercially used Pt- and Ru-based catalysts to drive both the ORR and the OER in rechargeable zinc-air batteries and other related applications.

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来源期刊
CiteScore
26.60
自引率
6.60%
发文量
3549
审稿时长
1.5 months
期刊介绍: Angewandte Chemie, a journal of the German Chemical Society (GDCh), maintains a leading position among scholarly journals in general chemistry with an impressive Impact Factor of 16.6 (2022 Journal Citation Reports, Clarivate, 2023). Published weekly in a reader-friendly format, it features new articles almost every day. Established in 1887, Angewandte Chemie is a prominent chemistry journal, offering a dynamic blend of Review-type articles, Highlights, Communications, and Research Articles on a weekly basis, making it unique in the field.
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