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Summary: This paper reviews the improvement of single-atom catalysts (SACs) through atom-level interface engineering. It introduces advanced techniques used for characterizing SACs and illustrates different design strategies to enhance the oxygen electrocatalysis performance of SACs. The future development and prospects of SACs for oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) are discussed.
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Salma Aman et al.
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Zhenxin Zhao et al.
Summary: This work presents a new method for developing stable and efficient oxygen evolution reaction (OER) catalysts. Reduced graphene oxide (rGO) composite Ni3S2 microspheres grown directly on nickel foam (Ni3S2-rGO/NF) were prepared and showed excellent OER catalytic activity and stability, with an overpotential of 303 mV at the current density of 100 mA cm-2. The synergistic effect of Ni3S2 microspheres and rGO was the main reason for enhancing the OER activity of Ni3S2-rGO/NF.
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NATURE COMMUNICATIONS
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Hui Zhao et al.
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Xue Yao et al.
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ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2023)
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Tuzhi Xiong et al.
Summary: This work develops a multifunctional electrode for electrochemical devices, which consists of nickel nitride and vanadium oxynitride on robust carbon fiber. The electrode exhibits excellent performances for hydrogen evolution reaction, oxygen evolution reaction, and sodium ion batteries. This work is important for the development of efficient and cost-effective flexible integrated electrochemical energy devices.
JOURNAL OF ENERGY CHEMISTRY
(2023)
Letter
Chemistry, Multidisciplinary
Richard J. C. Brown
Summary: This article briefly comments on a recent ACS Central Science article that assessed the performance of various laboratories in elemental analysis and suggests the need for a broader conclusion, acknowledging the advantages of metrology and the international quality infrastructure.
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Yuan Sheng et al.
Summary: NiFe phosphide (NiFe-P) is synthesized through flame aerosol synthesis (FAS) method, with controlled coformation of carbon, resulting in the selective synthesis of interlaced NiFe-P nanoplates and < 5 nm NiFe-P nanoparticles. During the oxygen evolution reaction (OER), NiFe-P transforms into highly active (oxy)hydroxides by surface oxidation and dephosphorylation. The optimal film shows high durability, with a slight structural instability induced by the electrochemical removal of carbon promoting a self-refreshing mechanism that helps maintain stable surface Fe content and enhances durability.
ACS APPLIED ENERGY MATERIALS
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Summary: Defect engineering has become crucial in rational catalyst design in the past decade. The role of defect-induced electronic modifications and surface reconstruction in water oxidation has attracted significant attention. Modern characterization techniques allow for in-depth analysis of catalysts under operating conditions, providing insights into changes in surface structure, composition, and electronic configuration that influence the reaction mechanism. This review provides an overview of ex-situ, in-situ, and operando characterization techniques used to study the properties of catalysts during the water oxidation process. The importance of defects in OER catalytic activity and stability is discussed, along with the challenges and future research directions in characterization techniques.
CHEMICAL ENGINEERING JOURNAL
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Huijuan Wu et al.
Summary: This article comprehensively summarizes and discusses the most important advances in engineering MOF nanoarchitectures for efficient water electrolysis. First, the methods of modulating the coordination structures and metal atom environments of MOF and MOF-derived catalysts are reviewed, and then their applications in water splitting are discussed based on the coordination structure and local atomic environment.
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Hailong Chen et al.
Summary: An advanced synchrotron-based in situ X-ray diffraction (XRD) technique is developed and used to track and monitor the real-time formation and phase selection of cobalt (Co) in electrodeposition, confirming the computational results obtained using DFT. The effects of controlling factors such as the electrolyte pH and deposition overpotential are systematically investigated, revealing that the phase of the electrodeposited Co is controlled by both thermodynamics and kinetics. The experimental results agree with the nanometric phase diagram computed with DFT, and layer-by-layer alternative stacking of fcc-hcp polymorphic phases can be easily achieved by adjusting the overpotential.
ACS MATERIALS LETTERS
(2023)
Review
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B. B. Sahoo et al.
Summary: This review focuses on the various energy storage mechanisms and the development of suitable supercapacitor electrodes. Among the electrode materials, graphene with metal sulphides shows higher specific capacitance, energy density, power density, and cyclic stability, making it commercially promising compared to carbides, nitrides, phosphides, oxides, and polymers.
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Wei Jiang et al.
Summary: Electrolysis of water is a green and environmentally friendly method for hydrogen production. However, the low efficiency of the oxygen evolution reaction (OER) limits its large-scale application. In this study, different micro-nano surface structures were constructed on Nickel-Cobalt-Cerium Oxide (Ni-Co-CeO2) catalytic electrodes using magnetic field-induced scanning electrodeposition. The effects of the micro-nano surface structure on catalytic performance were investigated. By optimizing the micro-nano surface structure, the Ni-Co-CeO2 catalytic electrode achieved the best OER efficiency.
JOURNAL OF ALLOYS AND COMPOUNDS
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Tao Xu et al.
Summary: In this study, a dual Z-scheme MoS2@g-C3N4/ZIF-8(Zn) hetero-junction was designed to achieve visible light photocatalytic activation Fenton reaction for efficient degradation of organic contaminants. The electron transfer from n-type g-C3N4 or ZIF-8(Zn) to p-type MoS2 was confirmed by various characterization techniques, providing a platform for band construction and dual Z-scheme model. The MCZ-7.5 sample demonstrated significantly higher degradation efficiency of methylene blue (MB) and oxytetracycline (OTC) compared to other samples, indicating the potential of MoS2 based double Z-pathway heterostructure in solving practical environmental issues.
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
(2023)
Review
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Bin Wang et al.
Summary: Electrochemical energy storage devices play a crucial role in achieving carbon neutrality by storing energy from renewable sources. Electron paramagnetic resonance (EPR) is a powerful technique for monitoring electron transfer, but its potential has been underutilized due to the need for strict operando cell design. This review comprehensively summarizes recent efforts to understand energy storage mechanisms using in situ/operando EPR and highlights the importance of strict cell design and realistic experimental conditions for future development of this technology in batteries.
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Bo Jiang et al.
Summary: Controlling the synthesis of metal nanostructures is crucial for catalyst engineering and optimizing the performance of electrocatalysis. Two-dimensional (2D) metallene electrocatalysts, with their ultrathin sheet-like morphology and unique properties, have gained significant attention in electrocatalysis. This review provides an in-depth summary of the progress in developing 2D metallenes for electrochemical applications, including their preparation methods and electrocatalytic performances in various conversion reactions. Current challenges and future research opportunities in electrochemical energy conversion using metallenes are also discussed.
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Zhipeng Yuan et al.
Summary: The atomic and electronic structure of the interface between Si precipitates and the Al matrix in multi-layered aluminum sheets is studied using HRTEM and first-principles calculation. Si needle precipitates and GP zones are found to form during natural aging process, and Al (Fe,Mn)Si precipitates act as nucleation sites for high-density Si precipitates. Covalent bonds between interfacial Si and Al atoms are crucial for interfacial bonding strength. These findings provide insights for future research on high-performance multilayer aluminum sheets.
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Teresa Insinna et al.
Summary: Graphite is a highly suitable anode material for lithium-ion batteries due to its low cost, low toxicity, and abundance. This study utilized electron paramagnetic resonance (EPR) spectroscopy to investigate the electronic structures of lithiated graphite anodes at different states of lithiation. The results demonstrated the heterogeneity within graphite particles and the presence of hyperfine coupling to lithium nuclei, highlighting the power of EPR spectroscopy in characterizing the local electronic structure of graphite and paving the way for its use in screening and investigating novel materials for lithium-ion batteries.
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Linda Sondermann et al.
Summary: In this study, a composite of a metal-organic framework (MOF) and a highly conductive carbon material was synthesized and showed better OER performance than commercially available products. Activation of nickel-cobalt clusters under anodic potential further improved the OER performance.
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Jietong He et al.
Summary: Transition metal oxides (TMOs) have been proposed as promising nonprecious metal catalysts for the active industrial hydrogen evolution reaction (HER). Electrochemical reconstruction, as an efficient and controlled method, has attracted attention for the preparation of TMO electrocatalysts. This study successfully prepared V-doped CoO nanosheets via cathode electrochemical reconstruction and found that the reconstructed material exhibited enhanced HER performance.
CHEMICAL ENGINEERING JOURNAL
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Yuhang Liu et al.
Summary: This article provides a comprehensive review on carbon-supported noble-metal electrocatalysts for the hydrogen evolution reaction (HER). It discusses the synthetic strategies, structural analyses, and applications of these electrocatalysts, and explores the correlation between electronic structure and activity. Furthermore, it offers a perspective on the challenges and opportunities in developing highly efficient HER electrocatalysts for widespread utilization in green hydrogen production.
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Summary: This study successfully achieved efficient and durable OER electrocatalysis by designing trimetallic sulfoselenide nanosheets. By modulating the composition ratio, catalysts with superior performance were obtained. Trimetallic sulfoselenide nanosheets showed better OER performance compared to bimetallic sulfoselenide nanosheets.
NPG ASIA MATERIALS
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ACS SUSTAINABLE CHEMISTRY & ENGINEERING
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Qin Li et al.
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JOURNAL OF COLLOID AND INTERFACE SCIENCE
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Simeng Li et al.
Summary: This study demonstrates that Cu vacancies on copper sulfide can switch the reaction pathway from formate to CO production, and the concentration of Cu vacancies can accurately regulate the faradaic efficiency and current density of CO. The presence of Cu vacancies changes the electronic structure of S sites, leading to the suppression of formate formation and the promotion of CO production.
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Yu Zhang et al.
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Zubair Ahmed et al.
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Hainan Sun et al.
Summary: This review focuses on the design strategies of heterogeneous electrocatalysts based on high-valence metal sites, emphasizing the importance of high-valence metal sites and structural modulation in water splitting. Advanced in situ and operando techniques are highlighted for tracking high-valence metal-based active sites, with proposed future research directions.
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