Self‐Assembled 3D N/P/S‐Tridoped Carbon Nanoflower with Highly Branched Carbon Nanotubes as Efficient Bifunctional Oxygen Electrocatalyst Toward High‐Performance Rechargeable Zn‐Air Batteries

Advanced Functional Materials, Journal Year: 2023, Volume and Issue: 34(16)

Published: Dec. 28, 2023

Abstract Heteroatom doping and 3D nanostructures with large specific surface area hierarchical porous structure can synergically improve oxygen reduction reaction (ORR) evolution (OER). In this study, the N/P/S‐tridoped nanoflower highly branched carbon nanotubes bifunctional catalyst (Co/SP‐NC) is prepared by a simple self‐assembly pyrolysis method. The powerful driving force of coordination interaction ammonium ion promote 2D ZnCo‐ZIF nanosheets into ZnCo/S‐ZIF nanoflowers at room temperature stirring. driven sodium hypophosphite to form during process. Moreover, Density functional theory (DFT) calculations also confirm that simultaneous introduction N/P/S redistribution electron density interface. proper P‐doping not only enhances electronic conductivity substrate, but facilitates charge transfer in OER/ORR Therefore, Co/SP‐NC cathode assembled zinc‐air batteries (ZABs) have higher power (187 mW cm −2 ), larger capacity (801 mAh g Zn −1 ) excellent cycle stability compared Pt/C‐RuO 2 ZABs. This work will pave way regulate components interactions designing structures.

Language: Английский

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Amorphous MnO₂ Lamellae Encapsulated Covalent Triazine Polymer‐Derived Multi‐Heteroatoms‐Doped Carbon for ORR/OER Bifunctional Electrocatalysis

Advanced Materials, Journal Year: 2024, Volume and Issue: 36(18)

Published: Jan. 19, 2024

Abstract The intelligent construction of non‐noble metal materials that exhibit reversible oxygen reduction reaction (ORR) and evolution (OER) with bifunctional electrocatalytic performance is greatly coveted in the realm zinc‐air batteries (ZABs). Herein, a crafted structure‐amorphous MnO 2 lamellae encapsulated covalent triazine polymer‐derived N, S, P co‐doped carbon sphere (A‐MnO /NSPC) designed using self‐doped pyrolysis coupled an situ encapsulation strategy. customized A‐MnO /NSPC‐2 demonstrates superior performance, confirmed by small Δ E index 0.64 V for ORR/OER. Experimental investigations, along density functional theory calculations validate predesigned amorphous surface defects abundant heteroatom catalytic active sites collectively enhance performance. Impressively, /NSPC‐based rechargeable liquid ZABs show large open‐circuit potential 1.54 V, ultrahigh peak power 181 mW cm −2 , enormous capacity 816 mAh g −1 remarkable stability more than 1720 discharging/charging cycles. Additionally, assembled flexible all‐solid‐state also demonstrate outstanding cycle stability, surpassing 140 Therefore, this highly operable synthetic strategy offers substantial understanding development magnificent electrocatalysts various sustainable energy conversions beyond.

Language: Английский

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Electrolyte Tuned Robust Interface toward Fast‐Charging Zn–Air Battery with Atomic Mo Site Catalyst

Advanced Functional Materials, Journal Year: 2023, Volume and Issue: 33(47)

Published: Sept. 3, 2023

Abstract Stable operation of sustainable Zn–air batteries (ZABs) has attracted considerable attention, but it remains a huge challenge to achieve temperature‐adaptive and fast‐charging ZABs. The poor Zn | electrolyte interface the sluggish charging kinetic are major obstacles. Here, high‐performance ZABs constructed by designing polarized zincophilic solid‐state (SSE) with unique solvation interaction 2+ ethylene glycol (EG), atomic Mo site cathode catalyst. On one hand, modulation structure ions partial substitution H 2 O EG inhibits dendrite growth parasitic reactions, leading improvement interface. Moreover, terminal groups in SSE strongly coordinated Zn/H O, which exerts profound influence on stability low‐temperature properties. other incorporated α‐Co(OH) mesoporous nanosheets decrease overpotential oxygen evolution reaction via strong electronic interaction. Consequently, assembled aqueous exhibit ten‐time ability remarkable cycling stability. show unprecedented (1400 cycles at 5 mA cm −2 ) high energy efficiency −40 °C.

Language: Английский

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Ultrasmall Pd nanocrystals confined into Co-based metal organic framework-decorated MXene nanoarchitectures for efficient methanol electrooxidation

Journal of Power Sources, Journal Year: 2024, Volume and Issue: 603, P. 234438 - 234438

Published: March 30, 2024

Language: Английский

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Fe/Cu diatomic sites dispersed on nitrogen-doped mesoporous carbon for the boosted oxygen reduction reaction in Mg-air and Zn-air batteries

Applied Catalysis B Environment and Energy, Journal Year: 2024, Volume and Issue: 358, P. 124450 - 124450

Published: July 27, 2024

Language: Английский

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Materials Containing Single‐, Di‐, Tri‐, and Multi‐Metal Atoms Bonded to C, N, S, P, B, and O Species as Advanced Catalysts for Energy, Sensor, and Biomedical Applications

Advanced Science, Journal Year: 2024, Volume and Issue: 11(33)

Published: July 1, 2024

Abstract Modifying the coordination or local environments of single‐, di‐, tri‐, and multi‐metal atom (SMA/DMA/TMA/MMA)‐based materials is one best strategies for increasing catalytic activities, selectivity, long‐term durability these materials. Advanced sheet supported by metal atom‐based have become a critical topic in fields renewable energy conversion systems, storage devices, sensors, biomedicine owing to maximum utilization efficiency, precisely located centers, specific electron configurations, unique reactivity, precise chemical tunability. Several offer excellent support are attractive applications energy, medical research, such as oxygen reduction, production, hydrogen generation, fuel selective detection, enzymatic reactions. The strong metal–metal metal–carbon with metal–heteroatom (i.e., N, S, P, B, O) bonds stabilize optimize electronic structures atoms due interfacial interactions, yielding activities. These provide models understanding fundamental problems multistep This review summarizes substrate structure‐activity relationship different active sites based on experimental theoretical data. Additionally, new synthesis procedures, physicochemical characterizations, biomedical discussed. Finally, remaining challenges developing efficient SMA/DMA/TMA/MMA‐based presented.

Language: Английский

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Boosting ORR/OER bifunctional electrocatalysis by promoting electronic redistribution of Fe-N-C on CoFe-FeNC for ultra-long rechargeable Zn-air batteries

Applied Catalysis B Environment and Energy, Journal Year: 2024, Volume and Issue: 359, P. 124485 - 124485

Published: Aug. 8, 2024

Language: Английский

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Selective oxygen reduction reaction: mechanism understanding, catalyst design and practical application

Chemical Science, Journal Year: 2024, Volume and Issue: 15(29), P. 11188 - 11228

Published: Jan. 1, 2024

The oxygen reduction reaction (ORR) is a key component for many clean energy technologies and other industrial processes. However, the low selectivity sluggish kinetics of ORR catalysts have hampered conversion efficiency real application these new mentioned before. Recently, tremendous efforts been made in mechanism understanding, electrocatalyst development system design. Here, comprehensive critical review provided to present recent advances field electrocatalytic ORR. two-electron four-electron transfer catalytic mechanisms evaluation parameters are discussed first. Then, up-to-date synthetic strategies

Language: Английский

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Research progress of Zn-air batteries suitable for extreme temperatures

Energy storage materials, Journal Year: 2024, Volume and Issue: 69, P. 103429 - 103429

Published: April 23, 2024

Language: Английский

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Rearranging Spin Electrons by Axial-Ligand-Induced Orbital Splitting to Regulate Enzymatic Activity of Single-Atom Nanozyme with Destructive d−π Conjugation

Journal of the American Chemical Society, Journal Year: 2024, Volume and Issue: 146(21), P. 14875 - 14888

Published: May 15, 2024

Most of the nanozymes have been obtained based on trial and error, for which application is usually compromised by enzymatic activity regulation due to a vague catalytic mechanism. Herein, hollow axial Mo–Pt single-atom nanozyme (H-MoN5@PtN4/C) constructed two-tier template capture strategy. The ligand can induce Mo 4d orbital splitting, leading rearrangement spin electrons (↑ ↑ → ↑↓) regulate activity. This creates catalase-like enhances oxidase-like catalyze cascade reactions (H2O2 O2 O2•–), overcome tumor hypoxia accumulate cytotoxic superoxide radicals (O2•–). Significantly, H-MoN5@PtN4/C displays destructive d−π conjugation between metal substrate attenuate restriction orbitals electrons. markedly improves performance (catalase-like activity) single atom peroxidase-like properties Pt atom. Furthermore, deplete overexpressed glutathione (GSH) through redox reaction, avoid consumption ROS (O2•– •OH). As result, limitations complex microenvironment (TME) tumor-specific therapy TME-activated

Language: Английский

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