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Article
Engineering, Environmental
Qi Jing et al.
Summary: The optimization of 3d electron configurations in Fe-Ni dual-metal catalysts on a carbon substrate enhances the catalytic activity for both oxygen evolution reaction (OER) and oxygen reduction reaction (ORR). The Fe3+ with high spin in Fe-Ni sites possess suitable 3d electron configurations for OER and ORR. The optimized metal sites, activated by 3d electron configurations and charges donated from the carbon substrate, balance the competition between OER and ORR and exhibit excellent bifunctional performances.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Multidisciplinary
Yu-Xiao Zhang et al.
Summary: A general synthetic strategy for constructing a diverse library of diatomic catalysts (DACs) with different metal combinations is presented. This strategy is based on an encapsulation-pyrolysis approach, which preserves the main body of the molecular framework during pyrolysis to control the structure of DACs. Taking the oxygen reduction reaction (ORR) as an example, this DAC library unlocks unconventional reaction pathways and provides opportunities for electrocatalyst development.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2023)
Article
Chemistry, Multidisciplinary
Yaohui Wu et al.
Summary: By developing a facile morphology-engineering strategy, this study successfully suppresses the interfacial fusion and agglomeration of metal/carbon-based catalysts in the pyrolysis-involved fabrication process. Five Co/N-doped hollow carbons with different morphologies (rhombic dodecahedron, cube, plate, interpenetration twin, and rod) are synthesized using metal-organic framework precursors. The interpenetration twin precursor shows the minimum interfacial contact, resulting in the best resistibility from interfacial fusion and aggregation of particles during pyrolysis. The anti-aggregated structure of the interpenetration twin precursor leads to a significantly improved catalytic property for biomass upgrading.
Article
Multidisciplinary Sciences
Ying Zang et al.
Summary: A pyrolysis-free approach was used to create a catalyst with dual Ni/Fe atomic active sites, which exhibited efficient electrochemical water splitting in both acidic and alkaline electrolytes at low overpotentials. Catalysts capable of electrochemical overall water splitting in acidic, neutral, and alkaline solution are important materials. This work developed bifunctional catalysts with single atom active sites through a pyrolysis-free route, enhancing catalytic performance and providing insights into the catalytic processes. The as-prepared catalyst showed efficient catalytic capability for electrochemical water splitting in both acidic and alkaline electrolytes, making it a promising model catalyst for mechanistic studies.
NATURE COMMUNICATIONS
(2023)
Article
Chemistry, Multidisciplinary
Xuelin Sheng et al.
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.
ACS SUSTAINABLE CHEMISTRY & ENGINEERING
(2023)
Article
Chemistry, Physical
Mohsen Tamtaji et al.
Summary: In this study, we designed graphene-supported dual atom catalysts (DACs) for the oxygen reduction reaction (ORR) by utilizing the non-bonding interaction of counterpart metals. The Fe active site in FeMN6-DAC and FeMN8-DAC systems were synergistically tuned by the non-bonding interaction, resulting in improved catalytic activity. Through both computational and experimental approaches, FeNiN8-DAC was found to have a low overpotential and high catalytic activity for the ORR.
Article
Engineering, Environmental
Abba Bala Musa et al.
Summary: Developing cost-effective and high-performance non-precious electrocatalysts for ORR is crucial for clean energy generation. Single-atom catalysts have shown significantly improved performance, but protecting their structure from deterioration is still a challenge. In this study, a simple strategy for protecting the structure of single-atom catalysts by implanting/decorating FeN4 on Fe-ZIF-derived carbon nanotubes is reported. The developed catalyst exhibits outstanding ORR activity in both acidic and alkaline media compared to commercial Pt/C.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Physical
Ning Zhang et al.
Summary: This study demonstrates an effective approach to regulate the oxygen reactivity and improve OER activity using Ti-substituted pyrochlore ruthenate as a catalyst. The electron hopping induced by DEI and the ferromagnetic nature of DEI construct both play important roles in governing the oxygen intermediates.
Article
Chemistry, Physical
Shi-Yi Lin et al.
Summary: In this study, highly efficient and cost-effective non-precious metal-based electrocatalysts were synthesized for oxygen reduction reaction (ORR), oxygen evolution reaction (OER), and hydrogen evolution reaction (HER). The catalyst exhibited improved performance with positive onset potential, small overpotential, and excellent stability. It shows great potential for applications in metal-air batteries and water electrolysis.
JOURNAL OF POWER SOURCES
(2022)
Article
Chemistry, Physical
Lingli Xing et al.
Summary: In this study, a transient heating-quenching strategy triggered by Joule heating was developed to synthesize single-atom cobalt- and nitrogen-doped graphene materials with a three-dimensional porous monolithic architecture. The resulting material exhibited high catalytic activity and durability for the hydrogen evolution reaction, showcasing the potential of this rapid and facile route for manufacturing single atom catalysts.
Article
Chemistry, Multidisciplinary
Xiaoran Zhang et al.
Summary: In this study, single cobalt atom catalysts embedded in nitrogen-doped carbon materials were successfully synthesized by precursor modulation. The researchers found that the catalyst with graphitic nitrogen coordination exhibited superior activity and stability in oxygen reduction and evolution reactions, due to the electron donation effect of graphitic nitrogen on the Co-N-4 active sites.
Article
Chemistry, Physical
Kuang-Min Zhao et al.
Summary: This study investigates the effect of axial ligands on the ORR catalytic activity of Fe-N-4 by using poly(iron phthalocyanine) as a model electrocatalyst. It reveals that the ORR activity of Fe-N-4 sites can be regulated by tuning the field strength of the axial ligands, and it is related to the energy level gap between OH p(x)p(y) and Fe 3dz2.
ADVANCED ENERGY MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Dawei Xi et al.
Summary: Carbon-supported Ni single-atom catalysts with precisely controlled single-atom structure achieved through joule heating strategy show superior performance in electrocatalytic carbon dioxide reduction reaction, with 80% of N dopants coordinated with metal elements, thereby avoiding unfavorable N species and demonstrating unprecedented activity, selectivity, and stability.
ADVANCED MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Songsong Li et al.
Summary: This study reports the synthesis of high efficiency electrocatalysts based on S-doped NiFeP and improves the reaction performance by tuning the electronic structure. The research provides a new strategy for designing highly active non-noble metal catalysts.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Lianping Wu et al.
Summary: A data-driven high-throughput design principle is proposed to evaluate the stability and activity of double-atom catalysts (DACs) for oxygen evolution and oxygen reduction reactions. This approach not only yields remarkable prediction precision but also significantly reduces the screening time compared to pure density functional theory calculations.
ADVANCED FUNCTIONAL MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Wei Li et al.
Summary: This study successfully addresses the challenges in engineering non-precious transition metal-based electrocatalysts for achieving optimal intrinsic activity, high density of active sites, and rapid mass transfer ability. The Fe0.5Co@HOMNCP composite catalyst exhibits extraordinary ORR activity and outperforms most Co-based catalysts reported to date. Moreover, it shows superior open-circuit voltage and power density when used as the air electrode in a zinc-air battery compared to a commercial Pt/C + IrO2 catalyst.
ADVANCED MATERIALS
(2022)
Article
Engineering, Environmental
Juanjuan Qi et al.
Summary: In this study, an interface architecture of Co(OH)2 nanosheets growing on the KNbO3 perovskite [Co(OH)2/KNbO3] was developed, which showed high catalytic activity and a high reaction rate constant in peroxymonosul-fate (PMS) activation, resulting in the complete removal of pazufloxacin within 5 minutes.
ENVIRONMENTAL SCIENCE & TECHNOLOGY
(2022)
Article
Energy & Fuels
Jing Bai et al.
Summary: The design of hybrid structures for catalysts is an important strategy to promote the reaction kinetics of hydrogen evolution. By synthesizing c-CoSe2@Co(OH)(2) hybrid catalysts from the self-reconstruction of Co0.85Se, the catalytic activity is significantly improved. Analysis shows that the catalyst has good conductivity and strong electron-donating ability, effectively enhancing the kinetics of the hydrogen evolution reaction by modifying the electronic structure and conductivity.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2022)
Article
Chemistry, Multidisciplinary
Xuyan Zhou et al.
Summary: Heteronuclear double-atom catalysts modify the charge density of active metal sites and enhance catalytic activities. CoFe-N-C exhibits exceptional ORR and OER electro-catalytic activities in alkaline media.
Article
Chemistry, Physical
Kai Dong et al.
Summary: Direct electrosynthesis of H2O2 via a two-electron oxygen reduction reaction (2e(-) ORR) under ambient conditions has the potential to replace energy-consuming and waste-intensive processes. This study presents a conductive two-dimensionally layered Mg-3(hexaiminotriphenylene)(2) electrocatalyst with high catalytic efficiency and selectivity for H2O2 production. In situ spectroscopic monitoring and kinetic studies provide insights into the reaction mechanism and the role of the Mg2+ center as the active site.
Article
Chemistry, Applied
Tong Shen et al.
Summary: This study successfully enhances the activity of cobalt single atoms on carbon nanosheets by adjusting the content of different nitrogen components, leading to the construction of efficient catalysts. The research reveals that Co-N-x and graphitic N are the main active sites, and the kinetics of oxygen reduction reaction in alkaline media can be positively influenced by the conductivity of the catalysts.
JOURNAL OF ENERGY CHEMISTRY
(2022)
Article
Chemistry, Multidisciplinary
Mengjie Liu et al.
Summary: By modulating the d-orbital energy level, we successfully synthesized N-doped carbon materials with paired metal sites. Compared with other counterparts, the Ru-Co diatomic catalyst exhibited higher oxygen electroreduction activity and better catalytic performance. Moreover, in a gas diffusion Zn-air battery, the Ru-Co diatomic catalyst showed bifunctional activity that outperformed commercial catalysts.
Article
Chemistry, Physical
Hao Jiang et al.
Summary: In this study, a bifunctional electrocatalyst composed of individually dispersed Ni single atoms on N-doped carbon nanosheets (Ni SAs-NC) was synthesized and demonstrated to exhibit outstanding performance for both oxygen reduction reaction (ORR) and urea oxidation reaction (UOR). By coupling ORR with UOR of low thermodynamic potential, a urea-assisted rechargeable Zn-air battery (ZAB) with significantly decreased charging voltage and high urea elimination rate was achieved. The high bifunctional electrocatalytic activities of Ni SAs-NC resulted in a dramatically increased energy conversion efficiency of 71.8%, improving conventional ZABs by 17.1%. This successful implementation of Ni SAs-based urea-assisted ZABs with improved energy conversion efficiency may advance practical applications of ZAB technology.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2022)
Article
Chemistry, Multidisciplinary
Soumi Mondal et al.
Summary: This study aims to design an extremely stable but unexplored ordered intermetallic structure and overcome the challenges of alkaline oxygen reduction reaction (ORR) by site-selective platinum substitution to tune the electronic environment of active sites. The experimental results demonstrate that Pt0.2Pd1.8Ge exhibits excellent catalytic performance and maintains activity even after accelerated degradation tests, with improved reaction efficiency by reducing hydrogen peroxide formation.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2022)
Article
Chemistry, Physical
Yuan Pan et al.
Summary: A facile and effective isolation-polymerization-pyrolysis strategy was used to synthesize a high-precision coupling catalyst with single-atomic Mn sites and Fe3C nanoparticles in N-doped porous carbon matrixes, exhibiting excellent electrocatalytic activity and stability for ORR.
Article
Chemistry, Physical
Jie Wei et al.
Summary: This study reveals the identification of ORR intermediates and RDSs at different active sites through Raman spectroscopy of FeN4 active sites, and the dynamic structural changes of FeN4 during ORR catalysis. It also confirms the role of two types of C-N sites in pyrolyzed Fe-N-C catalysts, showing different ORR intermediates and RDSs.
Article
Chemistry, Physical
Zhi-yuan Mei et al.
Summary: This study achieved dual performance optimization of iron phthalocyanine molecules by introducing reduced graphene oxide as the carrier. The optimized catalyst exhibited enhanced ORR performance and potential application in Zn-air batteries.
ENERGY STORAGE MATERIALS
(2022)
Review
Multidisciplinary Sciences
Guowei Xiong et al.
Summary: This article summarizes various non-thermal radiation heating methods for the synthesis of nanomaterials, compares the advantages and disadvantages of these methods, and discusses the future development and challenges.
Article
Engineering, Environmental
Shi-Yi Lin et al.
Summary: This study presents a convenient and general strategy for preparing high-yield FeCo-nitrogen-carbon nanotubes, which exhibit outstanding catalytic performance for oxygen reduction and oxygen evolution reactions in alkaline environments. Furthermore, the rechargeable Zn-air battery based on these nanotubes shows superior electrochemical performance, surpassing traditional catalysts.
CHEMICAL ENGINEERING JOURNAL
(2021)
Review
Chemistry, Multidisciplinary
Tongzhou Wang et al.
Summary: Electrochemical devices show great potential for sustainable development, but the lack of efficient electrocatalysts hinders their practical applications. Metal-organic frameworks (MOFs) derived catalysts with tunable structures and high activity have been intensively studied. These catalysts have shown promising applications in energy-related electrocatalysis such as hydrogen evolution, oxygen evolution, oxygen reduction, carbon dioxide reduction, and nitrogen reduction reactions.
Article
Chemistry, Multidisciplinary
Yuanmiao Sun et al.
Summary: Through density functional theory calculations, it was found that the OER activity of spinel zinc cobalt oxide is hindered by the presence of low-spin state cobalt cations, but increasing the spin state of cobalt cations can promote spin-selected charge transport and enhance active sites for intermediate adsorption. By controlling the calcination temperature to achieve high-spin state cobalt cations in ZnCo2O4, the catalytic activity was successfully optimized.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Chemistry, Multidisciplinary
Bailin Tian et al.
Summary: The study demonstrates that doping metals such as Co, Rh, and Ir can alter the OER activity of γ-NiOOH, and the in situ electrical conductivity shows a good correlation with enhanced OER activity. Density functional theory calculations are used to explain the in situ conductivity of metal-doped γ-NiOOH during OER, and the simultaneous increase of OER activity with intermediate conductivity is rationalized by the intrinsic connections to the double exchange interaction between adjacent metal ions.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Chemistry, Multidisciplinary
Jin-Cheng Li et al.
Summary: This research introduces a dual-phasic carbon nanoarchitecture for boosting the reaction rates of ORR and OER by combining single-atom and nanosized phases, resulting in a bifunctional catalyst with high activity and durability. The ZAB based on this catalyst demonstrates excellent power density and cycling stability.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Cejun Hu et al.
Summary: In this study, label-free surface-enhanced Raman spectroscopy was used to monitor the oxygen evolution reaction process on Ni3FeOx nanoparticles, revealing that Fe atoms are responsible for the initial OH- to O-O- oxidation, and the O-O- species undergo further oxidation between neighboring Fe and Ni sites.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Chemistry, Multidisciplinary
Xiaofeng Zhu et al.
Summary: A novel carbon-based catalyst PtNPC with low Pt content but high ORR activity and stability has been developed in this research. Analysis suggests that the success of PtNPC lies in altering the d-band center of Pt atoms to enhance activity and predominantly promote the 4-electron reaction pathway.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Chemistry, Multidisciplinary
Yun Qiao et al.
Summary: This study demonstrates a continuous fly-through material synthesis approach using a novel high-temperature reactor design based on thermal-shock technology. The system allows for uniform and ultrahigh temperatures up to 3200 K to be reached quickly, enabling the synthesis of Pt nanocatalysts anchored on carbon black at around 1400 K. The system shows excellent electrocatalytic activities towards methanol oxidation reaction, offering a highly efficient platform for nanomaterials synthesis at high temperatures.
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Hang Lei et al.
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Xibo Zhang et al.
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Yuanmiao Sun et al.
ADVANCED MATERIALS
(2020)
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Erjia Guan et al.
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Moonis Ali Khan et al.
JOURNAL OF HAZARDOUS MATERIALS
(2020)
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Zhiheng Wu et al.
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(2020)
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ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2019)
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Wei Ye et al.
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NATURE COMMUNICATIONS
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ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
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NATURE COMMUNICATIONS
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Xu Peng et al.
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(2017)
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Huan Yan et al.
NATURE COMMUNICATIONS
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ADVANCED ENERGY MATERIALS
(2017)
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Sheng Sui et al.
JOURNAL OF MATERIALS CHEMISTRY A
(2017)
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ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2015)
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(2014)
