Conferring supramolecular guanosine gel nanofiber with ZIF-67 for high-performance oxygen reduction catalysis in rechargeable zinc–air batteries

Gu, Chaonan; Li, Jingjing; Liu, Junpeng; Wang, Hai; Peng, Yu; Liu, Chun‐Sen

doi:10.1016/j.apcatb.2021.119888

Cited by 64 publications

(25 citation statements)

References 48 publications

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“…Synthesis of Co 4 N-Co 3 O 4 @C Catalyst: ZIF-67 was synthesized based on previously reported methods. [53,54] In detail, to obtain ZIF-67, alcoholic solution (15 mL) containing 2-methylimidazole (0.984 g) was added dropwise to a previously prepared ethanol solution of Co(NO 3 ) 2 (0.873 g) and PVP (0.3 g) with vigorous stirring to form a mixture (ratio of metal salt to ligand is 1:4 = 0.003:0.012 mol). The ZIF-67 was obtained after aging the mixture at room temperature for 24 h. Then, as-prepared ZIF-67 (200 mg) was dispersed in 30 mL of ethanol with continuous stirring for 30 min; afterward, melamine (300 mg) was introduced into the above solution, followed by drying using a rotary evaporator.…”

Section: Methodsmentioning

confidence: 99%

Atomic Interface‐Exciting Catalysis on Cobalt Nitride‐Oxide for Accelerating Hydrogen Generation

Guan

Liu

Zhang

et al. 2022

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The rational design of the interface structure between nitride and oxide using the same metallic element and correlating the interfacial active center with a determined catalytic mechanism remain challenging. Herein, a Co4N‐Co3O4 interface structure is designed to determine the effect of interfacial active centers on hydrogen generation from ammonia borane. An unparalleled catalytic activity toward H2 production with a turnover frequency up to 79 min−1 is achieved on Co4N‐Co3O4@C catalyst for ten recycles. Experimental analyses and theoretical simulation suggest that the atomic interface‐exciting effect (AieE) is responsible for the high catalytic activity. The Co4N‐Co3O4 interface facilitates the targeted adsorption and activation of NH3BH3 and H2O molecules to generate H* and H2. The two active centers of Co(N)* and Co(O)* at the Co4N‐Co3O4 interface activate NH3BH3 and H2O, respectively. This proof‐of‐concept research on AieE provides important insights regarding the design of heterogeneous catalysts and promotes the development of the nature and regulation of energy chemical conversion.

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Section: Methodsmentioning

confidence: 99%

Atomic Interface‐Exciting Catalysis on Cobalt Nitride‐Oxide for Accelerating Hydrogen Generation

Guan

Liu

Zhang

et al. 2022

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“…Exceptional electrochemical ORR and OER performances can be attributed to synergistic effects as follows. First, the presence of preferred metallic active sites of Fe/Co–Nx and Co–C, as well as the most efficient single-atoms-derived Fe–Nx sites. , Second, the presence of Fe and Co enhances metal active sites, doping efficiency, electronic conductivity, and ion transport channels, which facilitate the continuous electrons/ions/mass transfer pathways critically required for electrocatalysis. Third, encapsulation of metallic cobalt NPs and Fe/Co single atoms in the carbon structure inhibits aggregation of catalysts.…”

Section: Resultsmentioning

confidence: 99%

“…Koutecky–Levich (K-L) profiles for FeCo SAs@Co/N-GC revealed first-order reaction kinetics with superb linearity of profiles for various potentials (Figure S10). K-L profiles and rotating-ring-disk electrodes (RRDE) measurements determined the electron transfer number of FeCo SAs@Co/N-GC was ∼4, which vindicates 4-electron pathways present during the ORR (Figure S11). FeCo SAs@Co/N-GC determined H 2 O 2 yield of <3%, robustness over continuous 10 000 CV cycles, and chronoamperometric robustness for 100 h with a retention of ∼96% of its initial current density (Figures c, S11, and S12).…”

Section: Resultsmentioning

confidence: 99%

“…These results vindicates the exceptional oxygen bifunctional performances for FeCo SAs@Co/N-GC in contrast to those of most reported state-of-the-arts electrocatalysts for alkaline, nonalkaline (neutral), and acidic electrolytes (Figures g,h and S15–S18, and Tables S3–S5). − ,− …”

Section: Resultsmentioning

confidence: 99%

“…ZACs with a FeCo SAs@Co/N-GC electrode achieved larger gravimetric capability and energy density of 741 mAh g Zn –1 and 934 Wh kg Zn –1 at 5 mA cm –2 , respectively, corresponding to the consumed Zn, which outperforms those of Pt/C+RuO 2 (703 mAh g Zn –1 and 864 Wh kg Zn –1 , Figure d) plus other described best catalysts (Table S6). − ,,− ,− Figure e displays the long-term charge–discharge cycle lifespan for rate-capacity (10 mA cm –2 ). ZACs with FeCo SAs@Co/N-GC exhibited initial discharging and charging voltages of 1.23 and 1.92 V (voltage gap of 0.69 V ∼ voltaic efficiency of 64%), while the corresponding values for Pt/C+RuO 2 to be 1.2 and 2.06 V (voltage gap of 0.86 V ∼ voltaic efficiency of 58.2%).…”

Section: Resultsmentioning

confidence: 99%

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Heuristic Iron–Cobalt-Mediated Robust pH-Universal Oxygen Bifunctional Lusters for Reversible Aqueous and Flexible Solid-State Zn–Air Cells

Wagh

Kim

et al. 2021

ACS Nano

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Rechargeable aqueous zinc–air cells (ZACs) promise an extremely safe and high energy technology. However, they are still significantly limited by sluggish electrochemical kinetics and irreversibility originating from the parasitic reactions of the bifunctional catalysts and electrolytes. Here, we report the preferential in situ building of interfacial structures featuring the edge sites constituted by FeCo single/dual atoms with the integration of Co sites in the nitrogenized graphitic carbon frameworks (FeCo SAs@Co/N-GC) by electronic structure modulation approach. Compared to commercial Pt/C and RuO2, FeCo SAs@Co/N-GC reveals exceptional electrochemical performance, reversible redox kinetics, and durability toward oxygen reduction and evolution reactions under universal pH environments, i.e., alkaline, neutral, and acidic, due to synergistic effect at interfaces and preferred charge/mass transfer. The aqueous (alkaline, nonalkaline, and acidic electrolytes) ZACs constructed with a FeCo SAs@Co/N-GC cathode tolerate stable operations, have significant reversibility, and have the highest energy densities, outperforming those of noble metal counterparts and state-of-the-art ZACs in the ambient atmosphere. Additionally, flexible solid-state ZACs demonstrate excellent mechanical and electrochemical performances with a highest power density of 186 mW cm–2, specific capacity of 817 mAh gZn –1, energy density of 1017 Wh kgZn –1, and cycle life >680 cycles with extremely harsh operating conditions, which illustrates the great potential of triphasic catalyst for green energy storage technologies.

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Application of Conductive MOF in Zinc‐Based Batteries

Zhang

Jiang

et al. 2023

Advanced Materials

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The use of conductive MOFs (c‐MOFs) in zinc‐based batteries has been a popular research direction. Zinc‐based batteries are widely used with the advantages of high specific capacity and safety and stability, but they also face many problems. c‐MOFs have excellent conductivity compared with other primitive MOFs, and therefore have better applications in zinc‐based batteries. In this paper, we discuss the transfer mechanisms of the unique charges of c‐MOFs: hop transport and band transport respectively, and further address the way of electron transport. Then, it is introduced that c‐MOFs can be prepared in various ways, among which solvothermal, interfacial synthesis and post‐processing methods are widely used. In addition, the applications of c‐MOFs are discussed in terms of their role and performance in different types of zinc‐based batteries. Finally, the current problems of c‐MOFs and the prospects for their future development are presented.This article is protected by copyright. All rights reserved

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Conferring supramolecular guanosine gel nanofiber with ZIF-67 for high-performance oxygen reduction catalysis in rechargeable zinc–air batteries

Cited by 64 publications

References 48 publications

Atomic Interface‐Exciting Catalysis on Cobalt Nitride‐Oxide for Accelerating Hydrogen Generation

Atomic Interface‐Exciting Catalysis on Cobalt Nitride‐Oxide for Accelerating Hydrogen Generation

Heuristic Iron–Cobalt-Mediated Robust pH-Universal Oxygen Bifunctional Lusters for Reversible Aqueous and Flexible Solid-State Zn–Air Cells

Application of Conductive MOF in Zinc‐Based Batteries

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