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Article
Chemistry, Multidisciplinary
Wanchao Kang et al.
Summary: Using transient absorption spectroscopy and a photo-sensitization strategy, we have successfully resolved the sequential oxidation kinetics of water oxidation in the OER catalytic cycle, providing insights into the kinetic understanding of heterogeneous catalysis with multi-sites.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Chemistry, Physical
Yixuan Wen et al.
Summary: A nanoscale Li-O-2 nanobattery was assembled in an aberration-corrected environmental transmission electron microscope (ETEM) to track the catalytic mechanism of silver (Ag) catalyst during the charge/discharge process. It was found that numerous Ag nanoparticles were observed on the surface of Ag nanowire, which acted as catalysts for subsequent reactions. By synthesizing Ag nanoparticles decorated on porous carbon, the cycling stability and maximum specific capacity of Li-O-2 battery were improved. This study suggests that nanoscale Ag may be a promising catalyst for Li-O-2 battery.
Article
Chemistry, Physical
Zheng-Qi Liu et al.
Summary: By introducing NiFe-LDH nanodots on the single-atom Fe-N-C catalyst, NiFe-LDH/Fe-1-N-C heterostructure hollow nanorods were formed, which exhibit enhanced activity for oxygen reduction and evolution reactions (ORR/OER) and achieve efficient bifunctional ORR/OER activity. This catalyst not only shows excellent ORR activity but also demonstrates impressive bifunctional performance, indicating its potential as an alternative to precious metal catalysts and its significance for practical applications in rechargeable Zn-air batteries.
ADVANCED ENERGY MATERIALS
(2023)
Article
Chemistry, Physical
Hao Hu et al.
Summary: A bifunctional oxygen electrocatalyst enriched with single Fe atoms and NiFe2O4 nanoparticles is designed to enhance the performance of rechargeable zinc-air batteries. It accelerates the oxygen reduction reaction during discharging and promotes the oxygen evolution reaction during charging. The catalyst demonstrates excellent durability and enables high power density and low voltage loss for the corresponding zinc-air battery.
ENERGY STORAGE MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Zhe Li et al.
Summary: In this study, a composite oxygen reduction reaction (ORR)/oxygen evolution reaction (OER) bifunctional catalyst (P-Ag-Co(OH)(2)) was synthesized through a two-step strategy. The catalyst consists of atomic Ag anchored in reactive oxygen atoms around nanopores of Co(OH)(2) nanosheets. The abundant nanopores provide sufficient gas molecular diffusion channels, and the special Ag-O-Co-OH catalytic groups around nanopores display high intrinsic catalytic activity, leading to excellent ORR/OER performance. The P-Ag-Co(OH)(2) catalyst exhibits a high half-wave potential for ORR and a low overpotential for OER, surpassing non-noble catalysts and Pt/C (Ir/C) catalysts in previous studies. Additionally, a single-cell zinc-air battery based on this catalyst demonstrates an extremely high discharge peak power density and excellent discharge-charge cycle stability.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Yubing Liu et al.
Summary: A plasma approach is used to synthesize a carbon cloth supported carbon fiber and oxygen defect-rich NiCoO/NiCoN hetero-nanowire co-integrated hybrid catalyst. This catalyst exhibits high activity in oxygen reduction reaction (ORR) and oxygen evolution reaction (OER). It shows promising potential for application in all-solid-state zinc-air batteries.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Jingjing Cai et al.
Summary: The electronic structure of transition metal complexes can be modulated by replacing partial ions, which can lead to tuned electrocatalytic activity for oxygen reduction reaction (ORR) and oxygen evolution reaction (OER). However, the ORR activity of anion-modulated transition metal complexes is still unsatisfactory and it remains challenging to construct hetero-anionic structures. In this study, atomic doping strategy was used to prepare CuCo2O4-xSx/NC-2 (CCSO/NC-2) electrocatalysts, which showed excellent catalytic performance and durability for ORR and OER due to the partial substitution of S atoms for O in CCSO/NC-2. The introduction of S optimized the reaction kinetics and promoted electron redistribution.
ADVANCED MATERIALS
(2023)
Review
Chemistry, Multidisciplinary
Peng Yin et al.
Summary: In supported metal catalysts, the addition of sulfur-doped carbon as a support can induce various types of strong metal-support interaction, enhancing the catalyst's resistance to sintering at high temperatures and enabling its use in a wide range of applications with high dispersion and metal loading.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2023)
Article
Chemistry, Multidisciplinary
Rowan R. Katzbaer et al.
Summary: High-entropy oxides (HEOs) with randomly mixed metal cations in a crystalline oxide lattice exhibit unique properties, including band gap narrowing in a high-entropy aluminate spinel oxide. The band gap narrowing arises from the broadening of the energy distribution of the 3d states due to variations in electronegativities and crystal field splitting. As a catalyst for the oxygen evolution reaction, high-entropy oxide A5Al2O4 outperforms single-metal end members but suffers from catalyst deactivation due to the formation of a passivating layer.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Multidisciplinary Sciences
Haoliang Huang et al.
Summary: LiNiO2 catalyst exhibits super-efficient activity during the oxygen evolution reaction (OER) due to the formation of double O 2p holes states, as observed by operando XAS, XRD, and Raman spectroscopy. Designing efficient OER catalysts is crucial for energy conversion devices.
NATURE COMMUNICATIONS
(2023)
Article
Chemistry, Physical
Haohao Yan et al.
Summary: This work reports the synthesis of ultrathin nitrogen-doped carbon coated oxygen-vacancy rich RuO2 nanoparticles on carbon nanotubes as an efficient and acid-stable electrocatalyst for the oxygen evolution reaction. It exhibits high activity and excellent stability, surpassing the commercial RuO2 catalyst. The presence of oxygen vacancies strengthens the electronic coupling and enhances catalytic activity.
ADVANCED ENERGY MATERIALS
(2023)
Review
Chemistry, Multidisciplinary
Hao Wang et al.
Summary: Valence tuning of transition metal oxides is an effective approach to design high-performance catalysts for the oxygen evolution reaction (OER). High-valence oxides (HVOs) exhibit superior OER performance due to charge transfer dynamics and the evolution of intermediates. The filling of e(g)-orbitals and the promotion of charge transfer between the metal d band and oxygen p band enhance the OER performance. Additionally, HVOs utilize lattice oxygen as the redox center in the efficient lattice oxygen-mediated mechanism (LOM), overcoming the scaling limitation of the adsorbate evolution mechanism (AEM).
Article
Chemistry, Multidisciplinary
Zhibin Liu et al.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Fengli Yang et al.
Summary: The incorporation of Fe ions into Ni (hydr)oxides greatly enhances their activity for the electrochemical evolution of oxygen. Researchers have used a combination of electrochemical cell and transmission electron microscopy to observe the surface restructuring and formation of NiFe layered double (oxy)hydroxide (NiFe-LDH) under applied potential. They found that continued oxygen evolution leads to the formation of additional FeOx aggregates, which results in a decrease in the catalytic activity. The researchers also used various spectroscopic techniques to gain further insights into the catalyst composition, structure, and chemical state.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Multidisciplinary Sciences
Earl Matthew Davis et al.
Summary: Water electrolysis using renewable energy to produce 'green H-2' is a promising option for the future green economy. However, the efficiency is limited by the slow and complex oxygen evolution reaction at the anode. Cobalt-based oxidic anodes with added iron have been found to be good electrocatalysts for this reaction, but the role of iron is still unclear. In this study, the authors compare the oxygen evolution reaction activity of three well-defined epitaxial thin-film electrodes to investigate the role of iron.
NATURE COMMUNICATIONS
(2023)
Article
Chemistry, Physical
Yixuan Wen et al.
Summary: A nanoscale processing method was used to assemble a Li-O-2 nanobattery, where a single Ag nanowire was used as catalyst for O-2 electrode. The insertion process of lithium ions during electrochemical reactions was visualized. It was found that Ag nanoparticles on the surface of the Ag nanowire acted as catalyst during the charge/discharge reaction. Based on these findings, Ag nanoparticles decorated on porous carbon were synthesized and improved the cycling stability and the maximum specific capacity in a coin cell Li-O-2 battery.
Article
Chemistry, Multidisciplinary
Zepan Wang et al.
Summary: In this study, the structures of spinel oxides were tailored through a simple solvent method, and ACo2O4/NCNTs composites were synthesized for oxygen electrocatalysis. The optimized MnCo2O4/NCNTs demonstrated high activity and durability, showing great potential for application in zinc-air batteries. Density functional theory calculations revealed that substitutions can modulate the charge structure and improve the oxygen electrocatalytic performance.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Energy & Fuels
Zhixin Ge et al.
Summary: This study introduces nitrogen-doped Ag-based metal-organic gels (Ag-MOGs) in lithium ion batteries (LIBs) for the first time, demonstrating good electrochemical performances. The Co3O4 nanoparticles with smaller sizes (10-15 nm) on the surface of Ag-C exhibit excellent electrochemical performance due to the good conductivity of silver particles and the nitrogen doping of Ag-C.
Article
Chemistry, Physical
Ailong Li et al.
Summary: Incorporating Mn into Co3O4 catalyst can significantly extend its lifetime in acidic environment while maintaining its activity, which is an important step towards the realization of noble-metal-free water electrolysers.
Article
Chemistry, Multidisciplinary
Li An et al.
Summary: A surface evolution strategy was applied to change the surface structure of MnCo2O4 oxide, allowing for the switching of reaction pathways from 2e(-) ORR to 4e(-) ORR. Different surface configurations of MnCo2O4 were found to exhibit excellent performance in the oxygen reduction reaction.
ADVANCED MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Lingjie Zhang et al.
Summary: In this study, a new strategy for constructing advanced high-entropy electrocatalysts is proposed and demonstrated. By introducing an electron donor, the electrocatalytic activity of the catalyst is enhanced, and the underlying synergistic cocktail effect is revealed. This work is of great importance for guiding the design and fabrication of high-entropy electrocatalysts.
ADVANCED MATERIALS
(2022)
Article
Chemistry, Physical
Muhammad Sufyan Javed et al.
Summary: Two-dimensional transition metal carbides, nitrides, and carbonitride, known as MXenes, have shown great potential in energy applications. This review summarizes the recent advances in MXene/TMOs nanocomposites for energy storage devices such as supercapacitors, metal-ion hybrid capacitors, and rechargeable batteries. The integration of MXene nanosheets and TMOs nanostructures provides enhanced performance by facilitating fast electron and ion transport and preventing aggregation of the TMOs nanostructures. The future outlook and perspective for developing MXene/TMOs nanocomposites for energy storage applications are also discussed.
ENERGY STORAGE MATERIALS
(2022)
Article
Chemistry, Physical
Oykum N. Avci et al.
Summary: Using density functional theory, the mechanism and energetics of the oxygen evolution reaction on the (001) facets of spinel ferrites, especially Nickel ferrite and Cobalt ferrite, were extensively investigated. The results suggest that CoFe2O4 may be more promising as an OER catalyst compared to NiFe2O4 in certain conditions.
Article
Chemistry, Physical
Radhika G. Rao et al.
Summary: In this study, we demonstrate that carbons exhibit EMSI effects, which can enhance the catalytic activity of metals by controlling the surface chemistry. This finding contributes to a better understanding of the role of carbon materials in catalysis and provides new approaches for optimizing catalyst design.
Review
Chemistry, Physical
Zhouxin Luo et al.
Summary: This review provides a comprehensive overview and analysis of the formation mechanisms and surface energy minimization mechanisms of SMSI, as well as its applications in catalysts. It offers important insights for further research and design of advanced heterogeneous catalysts.
ADVANCED ENERGY MATERIALS
(2022)
Article
Chemistry, Physical
Yang-feng Cui et al.
Summary: In this study, a hybrid rechargeable zinc-air battery with a long lifespan and high working voltage is reported. It utilizes a neutral anolyte, an acidic catholyte, and a proton-shuttle-shielding dual-hydrophobic membrane to isolate the two electrolytes. The hybrid battery exhibits a high working voltage and stable operation, overcoming the limitations of conventional zinc-air batteries and promoting the development of electrolyte-decoupled systems.
Article
Chemistry, Physical
Huihuang Chen et al.
Summary: Noble metal-based single-atom catalysts play important roles in the field of oxygen evolution reaction (OER). This study examines the correlation among structural heterogeneity, electronic structure, and catalytic performance by constructing atomic Ir on Co3O4 substrate. The results reveal that the synergy of atomic Ir and oxygen vacancies leads to an active nanodomain with distinct electronic and geometric properties, enhancing the catalytic activity. Moreover, the strong metal-support interaction stabilizes the catalyst's structure and suppresses the dynamic structural transformation of the substrate.
Article
Chemistry, Physical
Yongzhi Zhao et al.
Summary: In this study, a genetic strategy was used to synthesize an efficient dual-functional catalyst, hollow-sphere-structured Mo SAC, for oxygen reduction reaction (ORR) and oxygen evolution reaction (OER). By modifying the coordination environment of the metal-sulfur bonding in the precursor, the researchers successfully enhanced the ORR catalysis of Mo SAC. The synthesized catalyst showed excellent performance in both ORR and OER, making it a promising candidate for metal-air batteries.
ENERGY STORAGE MATERIALS
(2022)
Article
Chemistry, Physical
Huiwen Zhang et al.
Summary: Doping of foreign atoms and construction of unique structures have been proven effective in designing high-activity and strong-durability electrocatalysts. In this study, Fe-doped nickel hydroxide carbonate hierarchical microtubes with Ag nanoparticles were successfully synthesized. Both experimental tests and theoretical calculations showed that Fe doping improved the conductivity, increased the electrochemical surface area, and acted as reactive centers to lower the free energy. The hierarchical structure also provided active sites and excellent cycling stability. The resulting Ag/NiFeHC HMTs exhibited excellent oxygen evolution reaction activity and long-term stability.
Article
Chemistry, Multidisciplinary
Jose A. Zamora Zeledon et al.
Summary: Understanding material-property relationships in mixed-element catalyst systems is crucial for renewable electrochemical energy technologies. In this study, the nature and dynamics of highly active Ag-MnOx catalyst surfaces for ORR were investigated using an experimental-theoretical approach. Well-mixed Ag-Mn co-deposited thin films were synthesized and showed enhanced specific activity compared to pure Ag. The enhancement was attributed to the tuned d-band of the material surfaces resulting from the optimal hybridization of electronic structures in specific Ag and MnOx geometries.
ENERGY & ENVIRONMENTAL SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Zhi-Yan Guo et al.
Summary: The covalency of TM-O bonds plays a critical role in governing the intrinsic catalytic activity of bimetallic spinel oxides, enhancing electron transfer and favoring interactions with PMS. By balancing PMS adsorption and metal reduction reactions, remarkable catalytic activities for PMS activation and pollutant degradation can be achieved, leading to the development of more active and robust metal oxide catalysts.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Chemistry, Physical
Ali Saad et al.
Summary: The study introduces borophene decorated with Ag nanoparticles (Ag@B) as a support for Co3O4 catalysts, significantly enhancing the oxygen-evolution-reaction (OER) performance. The improved OER activity of Co3O4-Ag@B is attributed to the increased catalytic sites on Co3O4 facilitated by conductive Ag nanoparticles and the reduced energy barrier for OER rate-determining step due to strong interaction of B atoms with Co and O atoms on Co3O4 nanoplates.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2021)
Article
Chemistry, Physical
Yi Feng et al.
Summary: The research utilized a laser ablation technique to prepare a strawberry-like catalyst embedded with Co3O4 and Ag cluster, effectively promoting water electrolysis process, reducing overpotential, and enhancing the performance of hydrogen evolution and oxygen evolution.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2021)
Article
Multidisciplinary Sciences
Wei Sun et al.
Summary: The study presents a zinc-O-2/zinc peroxide chemistry that operates through a 2e(-)/O-2 process in nonalkaline aqueous electrolytes, allowing highly reversible redox reactions in zinc-air batteries. This innovative ZnO2 chemistry, enabled by water-poor and zinc ion (Zn2+)-rich inner Helmholtz layer, shows superior reversibility and stability compared to alkaline zinc-air batteries.
Article
Chemistry, Multidisciplinary
Zhen Zhang et al.
Summary: This study presents a two ships in a bottle design for ternary Zn-Ag-O catalysts, with bimetallic electron configurations modulated by constructing a Zn-Ag-O interface. This design enhances CO selectivity, suppresses HCOOH generation, and achieves high energy efficiency, high CO Faradaic efficiency, and remarkable stability.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2021)
Article
Chemistry, Multidisciplinary
Cheng Chen et al.
Summary: The study developed a SrMn3O6-x-SrMnO3 (SMOx-SMO) heterostructure catalyst through epitaxial growth, showing excellent electrocatalyst performance for the oxygen reduction reaction (ORR). The formation of high-valence Mn3+/4+ promoted a positive shift in the d-band center, optimizing the catalytic activity at the heterojunction surface. Applied as an air-electrode catalyst in a rechargeable zinc-air battery, SMOx-SMO demonstrated high output voltage and power density, with cycling stability superior to Pt/C-IrO2 air-electrode catalysts.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Chemistry, Physical
Hao Li et al.
Summary: The oxygen reduction reaction (ORR) is crucial for fuel cell performance, with TMOs offering operational stability but lower activity compared to Pt-based electrocatalysts. The challenges in finding TMOs with high ORR activity lie in weaker oxygen binding on TMO surfaces and stronger electric field effects, making O-O bond breaking difficult. Experimental screening of 7,798 unique TMO compositions confirmed their lower activity compared to Pt.
Article
Chemistry, Multidisciplinary
Zhao Li et al.
Summary: Local atomic arrangement changes in crystals caused by lattice-mismatch-induced strain can efficiently regulate the performance of electrocatalysts for zinc-air batteries. A doping strategy using a small amount of copper modulates the phase transition and formation of self-supported cobalt fluoride-sulfide nanoporous films, overcoming structural instability and enhancing catalyst performance. The Cu-CoFS catalyst exhibited superior onset potentials for oxygen reduction and evolution reactions, surpassing commercial catalysts and demonstrating excellent charge/discharge cycling performance in ZABs.
ENERGY & ENVIRONMENTAL SCIENCE
(2021)
Article
Chemistry, Multidisciplinary
Xiao-Tong Wang et al.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2020)
Article
Chemistry, Multidisciplinary
Zhao Zhang et al.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2020)
Article
Chemistry, Physical
Changsoo Lee et al.
Article
Chemistry, Physical
Yuanmiao Sun et al.
Review
Chemistry, Physical
Lishan Peng et al.
ADVANCED ENERGY MATERIALS
(2020)
Article
Electrochemistry
Tatsumi Ishihara et al.
ELECTROCHIMICA ACTA
(2019)
Article
Chemistry, Multidisciplinary
Wenhai Wang et al.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2017)
