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Article
Chemistry, Multidisciplinary
Changchun Ye et al.
Summary: We developed a unique strategy to tailor metal-oxygen bond structure accurately through amorphous/crystalline heterojunction realized by ion-exchange. The optimized structure showed strengthened Sn-O bond, weakened Co-O bond, and introduced additional Fe-O bond, accompanied by abundant cobalt defects and optimal oxygen defects. The Fe-doped amorphous/crystalline catalyst demonstrated excellent oxygen evolution reaction and oxygen reduction reaction activities with a smaller potential gap, and the Zn-air battery based on it exhibited outstanding output power density, cycle performance, and flexibility.
Article
Chemistry, Physical
Cheng-Zong Yuan et al.
Summary: The synergistic regulation of the electronic structures of transition-metal oxide-based catalysts via oxygen vacancy defects and single-atom doping is efficient to boost their oxygen evolution reaction (OER) performance. In this study, a facile defect-induced in situ single-atom deposition strategy is developed to anchor atomically dispersed Ru single-atom onto oxygen vacancy-rich cobalt oxides (Ru/Co3O4-x) based on the spontaneous redox reaction between Ru3+ ions and nonstoichiometric Co3O4-x. The as-prepared Ru/Co3O4-x electrocatalyst with the coexistence of oxygen vacancies and Ru atoms exhibits excellent performances toward OER.
Review
Chemistry, Multidisciplinary
Peng Zhang et al.
Summary: This paper presents a systematic study on the dynamic mechanisms of single atom catalysts (SACs) in the oxygen reduction reaction and oxygen evolution reaction by combining in situ and/or operando characterizations and theoretical calculations. The structure-performance relationships are highlighted, and rational regulation strategies are proposed for designing efficient bifunctional SACs. Future perspectives and challenges are also discussed.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Hongjiao Huang et al.
Summary: In this study, oxygen vacancy-rich porous perovskite oxide (CaMnO3) nanofibers coated with reduced graphene oxide (rGO) were developed as the air electrode catalyst for low-temperature and knittable Zn-air batteries. The V-CMO/rGO exhibited top-level oxygen reduction reaction (ORR) activity among perovskite oxides and showed impressive kinetics under low temperature. The V-CMO/rGO demonstrated high peak power density of 56 mW cm(-2) and long cycle life of over 80 h at a low temperature of -40°C.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Physical
Lin Wu et al.
Summary: In this study, vanadium-doped Co9S8 nanoparticles encapsulated in nitrogen-doped porous carbon nanoflowers were prepared and applied as a bifunctional catalyst for the cathode of a rechargeable zinc-air battery. The catalyst exhibited excellent electrochemical performance, outperforming noble metal catalysts and recent Co-based catalysts.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Article
Chemistry, Multidisciplinary
Xilan Ding et al.
Summary: Integrating single atoms and clusters into one system is a novel strategy to achieve desired catalytic performances. Compared with homogeneous single-atom cluster catalysts, heterogeneous ones combine the merits of different species and therefore show greater potential. However, it is still challenging to construct single-atom cluster systems of heterogeneous species, and the underlying mechanism for activity improvement remains unclear.
Article
Multidisciplinary Sciences
Zhe Jiang et al.
Summary: An interfacial assembly strategy has been developed to construct single-atom binary Fe/Co-Nx sites with a high accessible site density, which leads to increased power densities in fuel cells and Zn/air batteries.
NATURE COMMUNICATIONS
(2023)
Article
Chemistry, Physical
Tingting Yu et al.
Summary: This study constructs electrocatalysts with high activity for both oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) in a multi-component high-entropy oxide (HEO) by adjusting the composition and proportion of metal elements. A highly bifunctional HEO/Co-N-C nanocomposite electrocatalyst is synthesized by integrating the highly ORR active Co-N-C with the multi-component HEO. When used in a Zn-air battery, this electrocatalyst achieves small charge/discharge voltage differences and ultralong lifespan.
APPLIED SURFACE SCIENCE
(2023)
Review
Electrochemistry
Wenjie Shao et al.
Summary: In this review, the design and optimization methods of nanostructured carbon-based electrodes for advanced Zn-air batteries are comprehensively summarized. By tailoring the structure of carbon-based materials and oxygen catalytic centers, the performance of oxygen electrodes can be improved. Furthermore, recent progress in engineering flexible and high-power Zn-air batteries is briefly outlined, and the challenges and future perspectives on the rational design of nanostructured carbon-based oxygen electrodes are discussed.
ELECTROCHEMICAL ENERGY REVIEWS
(2023)
Article
Chemistry, Physical
Cheng-Zong Yuan et al.
Summary: The synergistic regulation of electronic structures of transition-metal oxide-based catalysts using oxygen vacancy defects and single atom doping can significantly enhance their performance in oxygen evolution reaction (OER). In this study, a simple defect-induced in situ single-atom deposition strategy was developed to deposit atomically dispersed Ru single atoms onto oxygen vacancy-rich cobalt oxides (Ru/Co3O4-x) by a spontaneous redox reaction. The resulting Ru/Co3O4-x electrocatalyst, with the coexistence of oxygen vacancies and Ru atoms, exhibited excellent OER performance with a low overpotential, small Tafel slope value, and good long-term stability in alkaline media. Density functional theory calculations revealed that the synergy between oxygen vacancies and atomically dispersed Ru can optimize the adsorption of oxygen-based intermediates and reduce the reaction barriers of OER by tailoring the electron decentralization and d-band center of Co atoms. This study proposes a feasible strategy for constructing electrocatalysts with abundant oxygen vacancies and atomically dispersed noble metals, and provides a deep understanding of the electronic engineering of transition-metal-based catalysts to boost OER.
Article
Chemistry, Multidisciplinary
Guizhong Zhou et al.
Summary: This study presents a trifunctional electrocatalyst derived from ZIF, which exhibits excellent activity and stability in ORR, OER, and HER reactions. The CoFeN-NCNTs//CCM prepared also shows potential applications in zinc-air batteries and water-splitting cells.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Wei Zhang et al.
Summary: Employing the strong metal-support interaction (SMSI) effect can enhance the activity of catalysts towards the oxygen reduction reaction (ORR) and improve the utilization efficiency of platinum group metal (PGM) catalysts. By embedding ultralow loading of Pd in a surface-oxygenated PdNiMnO porous film, the SMSI effect at the Pd/oxygenated support interface is strengthened, leading to enhanced ORR performance. Furthermore, the Ni-containing oxygenated catalyst serves as both the active component for the oxygen evolution reaction (OER) and the functional support for stabilizing Pd, making it a bifunctional catalyst for zinc-air flow batteries (ZAFB).
ENERGY & ENVIRONMENTAL SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Yuto Shimoyama et al.
Summary: By utilizing porous ionic crystals (PICs), a composition-structure-function relationship of polyoxometalates (POMs) catalysts has been established, revealing that the synergistic catalysis originates from charge transfer from the Cr complex to [alpha-CoW12O40].
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2022)
Article
Chemistry, Multidisciplinary
Jiayi Qin et al.
Summary: Researchers successfully manipulate the structure and oxygen reduction reaction (ORR) performance of single-atom Ru-N-C catalysts using an S-anion coordination strategy, resulting in outstanding long-term durability and high activity. Metal-air batteries using this catalyst also exhibit fast kinetics and excellent stability.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2022)
Article
Chemistry, Multidisciplinary
Chenhui Zhou et al.
Summary: A Mn-doped RuO2 bimetallic oxide with atomic-scale dispersion of Mn atoms exhibits remarkable activity and super durability for both ORR and OER, providing a new catalyst design strategy for Zn-air batteries.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2022)
Article
Chemistry, Applied
Meng Li et al.
Summary: This article reports a novel and efficient electrocatalyst Ce-Ni3N@CC, which optimizes the UOR kinetics, reduces operation voltage, and provides cost-effective electrons. The catalyst exhibits superior catalytic performance and offers a promising design strategy for the future development of energy-related devices.
JOURNAL OF ENERGY CHEMISTRY
(2022)
Article
Chemistry, Physical
Kai Liu et al.
Summary: This study reports a facile one-pot synthesis method for high-performance electrocatalysts for oxygen reduction and oxygen evolution reactions, used as cathodes in metal-air batteries. The fabricated Pd-Pt-Ni trimetallic spiral nanosheets exhibit excellent electrocatalytic activity and rechargeability, achieved through template-directed growth and partial in situ oxidation. This work demonstrates the importance of atomic-level manipulation for designing high-performance energy conversion heterocatalysts.
JOURNAL OF MATERIALS CHEMISTRY A
(2022)
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.
Review
Electrochemistry
Anmin Liu et al.
Summary: MXenes, as an impressive family of two-dimensional transition metal carbides/carbonitrides, show great potential for energy storage due to their ideal specific surface area, excellent electrical conductivity, and superior chemical durability in batteries.
ELECTROCHEMICAL ENERGY REVIEWS
(2022)
Article
Chemistry, Applied
Di Zhou et al.
Summary: The Co/CoO@NSC bifunctional catalyst with interconnected porous architecture and intact metal@carbon structure shows superior electrocatalytic activities in ORR and OER comparable to Pt/C and RuO2 catalysts. The resulting Zn-air batteries exhibit high specific capacity, energy density, and long rechargeable properties, highlighting its potential as a rechargeable power source.
JOURNAL OF ENERGY CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Zhicheng Li et al.
Summary: This study presents a method to enhance the durability of Pt nanoparticles by converting the surface ligands into ultrathin graphitic shells through thermal annealing. The annealing temperature plays a critical role in determining the ORR performance of Pt catalysts, with Pt nanoparticles annealed at 700 degrees C showing high activity and exceptional stability. The graphitic-shell-coated Pt catalysts exhibit superior ORR stability and can be applied in designing durable catalysts for fuel cells.
ADVANCED MATERIALS
(2022)
Article
Chemistry, Physical
Liandong Li et al.
Summary: Zinc air battery is a promising device for solving energy and environmental problems, but the development of low-cost non-precious metal dual-functional catalysts remains a great challenge. In this study, a bifunctional catalyst with excellent electrocatalytic activities was synthesized and used in a zinc air battery, providing a reliable alternative.
APPLIED SURFACE SCIENCE
(2022)
Article
Chemistry, Physical
Taeoh Kang et al.
Summary: The use of defect-rich carbon with oxidized palladium and cobalt oxide improves the oxygen reduction and evolution reactions in zinc-air batteries, resulting in superior catalytic activity and stability.
APPLIED SURFACE SCIENCE
(2022)
Article
Chemistry, Physical
Xin Li et al.
Summary: In this study, interface-rich Au-doped PdBi (PdBiAu) nanochains with high ORR activity, durability, and methanol tolerance were prepared. In actual DMFC device tests, PdBiAu nanochains outperformed PdBi nanochains and Pt/C catalysts.
Article
Chemistry, Physical
Jimodo J. Ogada et al.
Summary: This study discussed the preparation and characterization of Pd-based catalysts containing ceria on carbon supports, highlighting the enhanced electrocatalytic properties of Pd-CeO2/OLC for the hydrogen oxidation reaction. The results suggest that Pd-CeO2/OLC could serve as a high-performing and durable anode material for anion-exchange-membrane fuel cells.
Article
Chemistry, Applied
Xue Zhao et al.
Summary: This study successfully developed a low-cost and efficient catalyst FeN4CB for efficient electrochemical oxygen reduction reaction (ORR), with comparable activity to commercial Pt/C and high stability in both acidic and alkaline media. FeN4CB as an air cathode in zinc-air batteries showed high voltage and power density, maintaining stability after long-term charge-discharge tests.
JOURNAL OF ENERGY CHEMISTRY
(2022)
Article
Chemistry, Physical
Khaled Elsaid et al.
Summary: This study successfully overcame the kinetic barriers and demonstrated good alkaline oxygen evolution reaction (OER) activity by synthesizing self-supported carbon nanowires (CNWs) decorated with bimetallic palladium-cerium PdCe alloys nanoparticles (NPs). The resulting PdCe/CNWs electrode showed low overpotential and Tafel slope, and exhibited comparable performance to the benchmark catalyst RuO2.
MOLECULAR CATALYSIS
(2022)
Article
Chemistry, Physical
Fei Xiao et al.
Summary: Researchers have designed a hybrid electrocatalyst consisting of atomically dispersed platinum and iron single atoms, as well as platinum-iron alloy nanoparticles. This electrocatalyst exhibits higher activity and durability in proton exchange membrane fuel cells.
Article
Chemistry, Multidisciplinary
L. Karuppasamy et al.
Summary: This study developed a unique multifunctional electrocatalyst through an in-situ chemical reaction and sonic probe irradiation method, which exhibited excellent performance in oxygen evolution reaction, oxygen reduction reaction, and hydrogen evolution reaction. The multifunctional electrocatalyst, composed of icosahedral palladium nanocrystals encapsulating on N-MoO2-Mo2C half-hollow nanotube heterointerface, demonstrated high catalytic activity, stability, and efficiency in water electrolysis.
MATERIALS TODAY CHEMISTRY
(2022)
Article
Chemistry, Physical
Zongnan Li et al.
Summary: In this study, a rod-like S-doped g-C3N4 was used to synthesize an excellent oxygen electrocatalyst Co@bCNTs. The Co nanoparticles are encapsulated within N, S-doped bamboo-like carbon nanotubes (bCNTs), which are further tangled with doped graphene and hybridized with a small amount of amorphous CoSx. The as-prepared catalyst exhibits superior bifunctional ORR/OER electrocatalytic activities and outstanding durability.
APPLIED SURFACE SCIENCE
(2022)
Article
Chemistry, Physical
Miao He et al.
Summary: This study presents a novel catalyst C-doped Co@C@TiO2, which demonstrates excellent catalytic activity and stability for oxygen reduction reaction in metal-air batteries and fuel cells. The unique C-doped layer and the outer C layer both contribute to stabilizing and enhancing the catalyst performance.
Article
Chemistry, Physical
Suqin Wu et al.
Summary: In this study, small-sized transition metal nitrides anchored on ultra-thin nitrogen-doped graphene were successfully synthesized using a combination strategy. The resulting CoN/UNG catalyst exhibited excellent electrochemical performance for oxygen reduction reaction (ORR) with high stability. This research provides a new approach for the rational design of catalysts in zinc-air batteries.
Article
Chemistry, Physical
Danye Liu et al.
Summary: Geometric structure and chemical composition are critical factors determining the electronic properties of metal catalysts. The wet-chemistry method used in this study successfully constructed core-shell nanoentities with enhanced catalytic activity through lattice strain and electronic interaction. The optimized core-shell nanoparticles exhibited excellent catalytic performance in an alkaline medium.
Article
Chemistry, Multidisciplinary
Teng-xiu Tu et al.
Summary: This study introduces a convenient method to prepare a difunctional catalyst with abundant active components through one-step pyrolysis. The catalyst, which is an Fe-, Co-, and N-codoped carbon-based cube hybrid, exhibits impressive activity and stability in electrocatalysis. Furthermore, it shows superior cycling stability in practical applications for zinc-air batteries.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2022)
Article
Chemistry, Physical
Mingchuan Luo et al.
Summary: This study demonstrates the unexpected effect of non-specifically adsorbed anions on the kinetics of oxygen reduction reaction (ORR) on a Pt electrode, which is different from the usual ORR descriptor. A voltammetry-accessible descriptor is proposed to track the dependence of ORR rates on electrolytes, and a model is proposed to explain the different trends of ORR rates under different conditions.
Article
Chemistry, Multidisciplinary
Licheng Huang et al.
Summary: This article reports a low-cost phosphated Zn-doped bimetallic skeleton that exhibits highly efficient electrocatalytic activity for water splitting. The catalyst achieves low overpotentials and good stability through heterogeneous atom doping and a self-supported electrode design.
ENERGY & ENVIRONMENTAL SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Jieyuan Liu et al.
Summary: Long-term exposure of M-N-C catalysts in air causes surface oxidation and hydroxylation, leading to decreased ORR activity and fuel-cell performances. Hydrogen passivation protects active sites and improves storage stability of the catalysts.
ADVANCED MATERIALS
(2021)
Article
Multidisciplinary Sciences
Kai Ling Zhou et al.
Summary: Single-atom platinum immobilized NiO/Ni heterostructure acts as a highly efficient alkaline hydrogen evolution catalyst by enabling tunable binding abilities and enhancing water dissociation energy. Constructing hierarchical three-dimensional morphology further enhances the catalytic performance.
NATURE COMMUNICATIONS
(2021)
Review
Chemistry, Physical
Wendan Xue et al.
Summary: The development of stable, adequate, and cost-effective catalysts for fuel cells is urgent. Heteroatom-doped carbons and metal-organic frameworks (MOFs) are promising materials for electrocatalytic oxygen reduction reaction (ORR). Component manipulation, morphological control, and structural engineering play important roles in improving the ORR performance of these materials.
Article
Chemistry, Multidisciplinary
Xiaoyang Cheng et al.
Summary: A novel strategy was developed to enhance the ORR activity of Co single-atom catalysts by introducing a deformed CoN4 site and Co nanoparticle-CoN4 composite sites, which effectively replenished the total density of CoN4. The resulting concave nanocube-like catalyst exhibited excellent ORR performance and high power density in acidic media, with theoretical studies confirming the enhanced O-2 activation and reduced carbon layer erosion. This research not only provides a new approach to develop ORR catalysts, but also contributes to a deeper understanding of ORR fundamentals.
ENERGY & ENVIRONMENTAL SCIENCE
(2021)
Review
Chemistry, Multidisciplinary
Sandip Maiti et al.
Summary: Electrocatalysis plays a crucial role in future energy conversion and storage technologies such as fuel cells, water electrolyzers, and metal-air batteries. By tuning atomic surface structure, optimization of catalyst activity and stability can be achieved. Experimental studies reveal the impact of lattice strain on catalytic activity tuning and establishing reactivity-strain relationships informs the tuning and enhancement of electrocatalytic activity and stability.
ENERGY & ENVIRONMENTAL SCIENCE
(2021)
Review
Chemistry, Multidisciplinary
Chang-Xin Zhao et al.
Summary: The review addresses the design principles for high-performance noble-metal-free bifunctional oxygen electrocatalysts, emphasizing strategies for intrinsic activity regulation and active site integration. Statistical analysis of reported bifunctional electrocatalysts reveals composition-performance relationships and provides guidance for further exploration of emerging candidates. Perspectives for developing advanced bifunctional oxygen electrocatalysts and aqueous rechargeable metal-air batteries are proposed.
CHEMICAL SOCIETY REVIEWS
(2021)
Review
Electrochemistry
Shiming Zhang et al.
Summary: This review provides a comprehensive overview and in-depth analysis of recent progress in noncarbon materials for ORR electrocatalysts, discussing their advantages and drawbacks, as well as proposing strategies to enhance electrocatalytic performance.
ELECTROCHEMICAL ENERGY REVIEWS
(2021)
Article
Engineering, Environmental
Yisi Liu et al.
CHEMICAL ENGINEERING JOURNAL
(2020)
Editorial Material
Chemistry, Multidisciplinary
Liang Yu et al.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2020)
Article
Chemistry, Multidisciplinary
Peng Yu et al.
ADVANCED MATERIALS
(2019)
Article
Multidisciplinary Sciences
Mingchuan Luo et al.
Article
Chemistry, Multidisciplinary
Hua Bing Tao et al.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2016)
