支撑在石墨烯基材料上的镍纳米颗粒作为碱性膜燃料电池阴极的高稳定性催化剂。

IF 4.4 3区材料科学 Q2 CHEMISTRY, MULTIDISCIPLINARY

Nanomaterials Pub Date : 2024-11-04 DOI:10.3390/nano14211768

Sthephanie J Martínez, Raquel Cos-Hugas, Marco Bellini, Hamish A Miller, Alessandro Lavacchi, José Luis Rodríguez, Elena Pastor

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引用次数: 0

摘要

在阴离子交换膜燃料电池（AEMFC）中测试了石墨烯基材料上支撑的镍纳米颗粒作为氧还原反应（ORR）催化剂的性能。在石墨烯结构中引入 N 可改善电子传递并为 ORR 创造额外的活性位点，从而提高电催化活性。同时含有 N 和 S 的材料表现出最高的稳定性，在 10 小时的稳定性测试后仅有 3% 的性能损失，因此获得了最佳的整体性能。这种长期耐久性归功于镍纳米粒子和双掺杂（S/N）还原氧化石墨烯的协同效应。研究结果表明，在石墨烯结构中策略性地加入氮和硫对优化镍基催化剂的电催化性能起着至关重要的作用。

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Ni Nanoparticles Supported on Graphene-Based Materials as Highly Stable Catalysts for the Cathode of Alkaline Membrane Fuel Cells.

Ni nanoparticles supported on graphene-based materials were tested as catalysts for the oxygen reduction reaction (ORR) to be used in anion exchange membrane fuel cells (AEMFCs). The introduction of N into the graphene structure produced an enhancement of electrocatalytic activity by improving electron transfer and creating additional active sites for the ORR. Materials containing both N and S demonstrated the highest stability, showing only a 3% performance loss after a 10 h stability test and therefore achieving the best overall performance. This long-term durability is attributed to the synergetic effect of Ni nanoparticles and bi-doped (S/N)-reduced graphene oxide. The findings suggest that the strategic incorporation of both nitrogen and sulphur into the graphene structure plays a crucial role in optimising the electrocatalytic properties of Ni-based catalysts.

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来源期刊

Nanomaterials NANOSCIENCE & NANOTECHNOLOGY-MATERIALS SCIENCE, MULTIDISCIPLINARY

CiteScore

8.50

自引率

9.40%

发文量

3841

审稿时长

14.22 days

期刊介绍： Nanomaterials (ISSN 2076-4991) is an international and interdisciplinary scholarly open access journal. It publishes reviews, regular research papers, communications, and short notes that are relevant to any field of study that involves nanomaterials, with respect to their science and application. Thus, theoretical and experimental articles will be accepted, along with articles that deal with the synthesis and use of nanomaterials. Articles that synthesize information from multiple fields, and which place discoveries within a broader context, will be preferred. There is no restriction on the length of the papers. Our aim is to encourage scientists to publish their experimental and theoretical research in as much detail as possible. Full experimental or methodical details, or both, must be provided for research articles. Computed data or files regarding the full details of the experimental procedure, if unable to be published in a normal way, can be deposited as supplementary material. Nanomaterials is dedicated to a high scientific standard. All manuscripts undergo a rigorous reviewing process and decisions are based on the recommendations of independent reviewers.