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PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
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Summary: Effective adjustment of the internal electron spin state and the external charge density of metal-nitrogen complex carbon (M/NC) electrocatalysts is crucial for enhancing their catalytic activity. In this study, a FeMn/NC dual-atom catalyst with a FeN4-MnN4 local structure is synthesized, showing excellent oxygen reduction reaction (ORR) performance in acidic, neutral, and alkaline environments. The Zn-air battery based on the FeMn/NC catalyst exhibits high open-circuit voltage, satisfactory output power density, and strong charge-discharge stability, outperforming commercial Pt/C. The exceptional catalytic performance is attributed to the modification of charge environment and the transition of the 3d orbital spin state at the metal center, demonstrated by density functional theory calculations. This work provides valuable insights into the rational design of bimetallic catalysts with remarkable ORR capability.
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Summary: In water splitting electrolyzers, platinum single-atom catalysts show remarkable catalytic activity and stability for anodic oxygen evolution. Their superior performance is attributed to the unique coordination with cobalt hydrogen phosphate and the suppression of soluble platinum species. Utilizing alkaline water electrolyzers with ultra-low platinum loading achieves industrial-level current density and high durability.
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Junming Zhang et al.
Summary: This review provides a comprehensive introduction to the importance of adsorption energy in electrochemical reactions and its role in bridging the gap between catalyst structure and activity. Focusing on oxygen electrocatalysis, it discusses the selection of adsorption energy as an activity descriptor, intrinsic and empirical relationships related to adsorption energy, the link between structure and electrocatalytic performance, approaches to obtain adsorption energy, strategies to improve catalytic activity by modulating adsorption energy, extrinsic influences on adsorption energy from the environment, and methods to bypass linear scaling relations of adsorption energy. An outlook is also provided, highlighting possible future investigations related to the obstacles between adsorption energy and electrocatalytic performance.
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Xiao Wang et al.
Summary: In this study, an iron single-atom catalyst confined in a covalent organic framework exhibited outstanding oxygen evolution reaction (OER) performance, with high mass activity and record-low overpotential and Tafel slope. This work provides design strategies for advanced electrocatalysis through the prudent confinement of unusually coordinated single-atom catalysts.
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Summary: A newly explored zinc-based single-atom catalyst with a unique N-2-Zn-B-2 configuration demonstrates impressive ORR activity and remarkable long-term stability, achieved through manipulating the s-band by constructing a B,N co-coordinated Zn-B/N-C catalyst.
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Yuchao Wang et al.
Summary: This paper discusses the importance of developing efficient and robust electrochemical energy storage systems, as well as the role of single atom catalysts in improving device performance. Additionally, it summarizes the working principles and challenges of next-generation electrochemical energy storage and conversion devices.
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Riccardo Ruixi Chen et al.
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ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
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Chemistry, Physical
Siqi Niu et al.
Summary: By preparing a RuO2/(Co,Mn)3O4 nanocomposite with low Ru loading, the catalytic activity and stability of oxygen evolution reaction in acidic media have been significantly improved. The catalyst shows high activity at 10 mA/cm(2), providing a new energy-efficient design strategy for energy conversion applications.
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(2021)
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Hongguan Li et al.
Summary: This study reveals the significant impact of the cooperative interplay between charge itineration and spin-polarization of electrons on catalytic behavior through density functional theory calculations. The Fe-Ni atomic pair is reported as a superior bifunctional catalyst for high performance ORR and OER, with a very small potential difference (Delta E) of 0.691 V. The coexistence of Fe 3d itinerant charge and moderate spin polarization is responsible for the superior functional catalytic activity for the Fe-Ni atomic pairs.
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Jing Wang et al.
Summary: This study systematically investigated Zn-Co bimetallic isolation using density functional theory and found that the ZnCoN6-gra(I) configuration exhibited the strongest interaction with oxygen-containing species. By optimizing the free energy change of these species, the volcano peaks of ORR and OER were effectively brought closer, enabling a promising bifunctional catalyst with durability in both acidic and alkaline media.
JOURNAL OF ENERGY CHEMISTRY
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Jingjie Ge et al.
Summary: The rational design of FM-AFM core-shell catalysts enhances electron transport efficiency and improves OER activity, with critical factors including shell thickness and magnetic domain structure.
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Zhaoyu Jin et al.
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Review
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Changshui Wang et al.
Summary: Self-supported catalysts play a crucial role in OER with improved conductivity, nanostructure, and active sites. Recent research has focused on diverse synthetic methods and strategies to enhance OER catalytic activity and stability.
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