在二维介孔石墨纳米碳骨架上合成完全暴露的铂纳米颗粒用于氧还原反应。

IF 3.7 2区 化学 Q2 CHEMISTRY, MULTIDISCIPLINARY
Yuwei Deng, Qing Long, Yifan Gao, Kefei Chen, Hongyuan Sheng, Yajun Wang, Angang Dong
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引用次数: 0

摘要

在恶劣的操作条件下,包括高氧浓度、高湿度、低pH值和高电位,质子交换膜燃料电池的耐久性经常受到氧还原反应(ORR)阴极中碳载体的腐蚀的影响。为了克服这一限制,我们报道了通过化学蚀刻和高温石墨化合成二维介孔石墨纳米碳框架(MGF)。由此产生的MGF具有单层、高度有序的纳米框架结构,具有增强的结构稳定性和导电性。利用这些结构优势,我们设计了锚定在MGF上的完全暴露的Pt纳米颗粒(Pt@MGF)作为模型系统,研究石墨化程度、孔结构和电催化性能之间的相互作用。其中,在1200°C下合成的Pt@MGF-1200具有优化的介孔约束和强的pt -碳相互作用。这导致了优异的电化学耐久性和ORR活性,将Pt@MGF-1200定位为传统Pt/C催化剂的有希望的替代品。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Synthesis of Fully Exposed Pt Nanoparticles on a 2D Mesoporous Graphitic Nanocarbon Framework for the Oxygen Reduction Reaction.

The durability of proton-exchange membrane fuel cells is often compromised by the corrosion of carbon supports in oxygen reduction reaction (ORR) cathodes under harsh operating conditions, including high oxygen concentration, elevated humidity, low pH, and high potentials. To overcome this limitation, we report the synthesis of a 2D mesoporous graphitic nanocarbon framework (MGF) via chemical etching and high-temperature graphitization. The resulting MGF features a monolayer, highly ordered nanoframe architecture that offers enhanced structural stability and conductivity. Leveraging these structural advantages, we designed fully exposed Pt nanoparticles anchored on the MGF (Pt@MGF) as a model system to investigate the interplay between graphitization degree, pore architecture, and electrocatalytic performance. Among the variants, Pt@MGF-1200, synthesized at 1200 °C, demonstrates optimized mesopore confinement and strong Pt-carbon interactions. This results in superior electrochemical durability and ORR activity, positioning Pt@MGF-1200 as a promising alternative to conventional Pt/C catalysts.

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来源期刊
Chemistry - A European Journal
Chemistry - A European Journal 化学-化学综合
CiteScore
7.90
自引率
4.70%
发文量
1808
审稿时长
1.8 months
期刊介绍: Chemistry—A European Journal is a truly international journal with top quality contributions (2018 ISI Impact Factor: 5.16). It publishes a wide range of outstanding Reviews, Minireviews, Concepts, Full Papers, and Communications from all areas of chemistry and related fields. Based in Europe Chemistry—A European Journal provides an excellent platform for increasing the visibility of European chemistry as well as for featuring the best research from authors from around the world. All manuscripts are peer-reviewed, and electronic processing ensures accurate reproduction of text and data, plus short publication times. The Concepts section provides nonspecialist readers with a useful conceptual guide to unfamiliar areas and experts with new angles on familiar problems. Chemistry—A European Journal is published on behalf of ChemPubSoc Europe, a group of 16 national chemical societies from within Europe, and supported by the Asian Chemical Editorial Societies. The ChemPubSoc Europe family comprises: Angewandte Chemie, Chemistry—A European Journal, European Journal of Organic Chemistry, European Journal of Inorganic Chemistry, ChemPhysChem, ChemBioChem, ChemMedChem, ChemCatChem, ChemSusChem, ChemPlusChem, ChemElectroChem, and ChemistryOpen.
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