Related references
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Summary: A study finds that optimizing the electronic configuration of single-atom Fe-N-C catalysts by incorporating adjacent Ru-N-4 moieties can enhance their oxygen reduction reaction (ORR) performance, resulting in lower adsorption energy of ORR intermediates at Fe sites.
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Liu Yang et al.
Summary: In this study, a metal-free carbon catalyst NDPC-1000 with a graphitic N-regulating defect structure was designed for anion-exchange membrane fuel cells (AEMFCs) through theoretical calculations and experiments. The graphitic N was found to tailor the charge density of defects to enhance the adsorption energy-activity relation, and the high durability was attributed to the dissociation energy of the C-N covalent bond. The synthesized NDPC-1000 demonstrated excellent ORR activity and durability in alkaline media, achieving a peak power density of 913 mW cm(-2) and a voltage decay of approximately 25% after 100 hours of continuous operation.
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Xueli Li et al.
Summary: The atomic configurations of FeNx moieties play a crucial role in the activity of ORR. However, traditional synthesis methods often result in diverse local environments for FeNx sites. Understanding the effect of carbon matrix adjacent to FeNx sites on ORR activity is important but challenging due to the complexity of nitrogen connections and random defects.
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Hao Xu et al.
Summary: A facile dual melt-salt-mediated templating method is developed to prepare a Fe-N-C catalyst with tailored porous framework. The catalyst demonstrates outstanding ORR performance and good stability in both alkaline and acid media, as well as in liquid and solid-state Zn-air battery.
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(2022)
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Lei Shi et al.
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Zhipeng Yu et al.
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Article
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Jian Sheng et al.
Summary: This research focuses on the design of single-site Fe-N-C catalysts with high bifunctional activity for oxygen reduction/evolution reactions (ORR/OER). Through additional P-doping, the catalysts exhibit improved activity by increasing active sites and optimizing oxygen adsorption. The experimental results demonstrate that the doped catalysts show excellent performance in oxygen electrocatalysis.
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Yuhui Tian et al.
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Kaian Sun et al.
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Shiqing Huang et al.
Summary: A new Fe-Mn-N-C dual-atom catalyst has been synthesized in this study, which improves the activity of oxygen reduction reaction by tailoring its electronic structure, and exhibits excellent performance in proton/anion-exchange membrane fuel cells.
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Zeyu Xiao et al.
Summary: Compared to most single-atom catalysts, dual-atom catalysts demonstrate better catalytic performance. In this study, atomically dispersed FeCu-NC catalyst was synthesized and showed superior half-wave potential and peak power density in alkaline medium, highlighting the synergistic mechanism of dual-atom sites in improving catalytic activity.
CHEMICAL ENGINEERING JOURNAL
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Yongping Yang et al.
Summary: This study constructs a composite catalyst of AgNPs@Fe-N-C, which demonstrates outstanding ORR performance and durability in alkaline condition. AEMFC based on this composite catalyst shows high peak power density and long-term device durability, surpassing Fe-N-C-based AEMFC.
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Jie Ye et al.
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Jiao Wu et al.
Summary: The rapid development of wearable devices has increased the demand for stable, solid-state, flexible, and even stretchable energy storage systems. Zinc-air batteries (ZABs), especially high-safety ones, have attracted attention due to their high specific energy density. However, the performance of ZABs severely deteriorates at low temperatures due to reduced ionic conductivity and sluggish kinetics. Gel polymer electrolytes (GPEs) designed with superior mechanical performance and accelerated ion transport have shown potential to enhance the electrochemical performance of ZABs at low temperatures. This review provides insights into the rational design of GPEs for ZABs and their potential applications in other energy storage systems.
JOURNAL OF MATERIALS CHEMISTRY A
(2022)
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Chemistry, Multidisciplinary
Zhiyu Lin et al.
Summary: This study reports a carbon catalyst with a single calcium atom coordinated with N and O, exhibiting exceptional ORR activities under both acidic and alkaline conditions, as well as outstanding performance in zinc-air battery. The high catalytic activity of main-group calcium is attributed to its electron structure being regulated by N and O coordination, facilitating the adsorption of ORR intermediates and electron transfer.
ADVANCED MATERIALS
(2021)
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Zhe Wang et al.
Summary: Researchers have developed a new ternary-atom catalyst with Co-Co dimers and Fe single sites, demonstrating superior performance in ORR.
By controlling the local configuration of atoms, researchers have enhanced the performance of the catalyst, making it a promising alternative to platinum for driving zinc-air batteries.
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Linyu Hu et al.
Summary: Utilizing metal-organic frameworks (MOFs) as precursors, single-atom catalysts with high density have been successfully constructed. FeN4Cl1/NC demonstrates excellent oxygen reduction reaction (ORR) activity, with Cl optimizing the adsorption free energy of Fe sites to promote the ORR process.
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Jingjing Ma et al.
Summary: This study demonstrates the use of an S-doped Fe-N-C catalyst with hierarchical porous architecture as an oxygen reduction reaction (ORR) catalyst in a high-power-density zinc-air battery. The unique structure of the catalyst significantly increases active sites, promotes O-2 transport, and enhances intrinsic activity, leading to superior performance in the assembled zinc-air battery with a super high-power density of 453 mW cm(-2).
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Yanan Zhang et al.
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