Mechanochemical coordination self-assembly for Cobalt-based metal-organic framework-derived bifunctional oxygen electrocatalysts

Zhang, Yating; Wang, Peng; Li, Keke; Zhang, Nana; Liu, Guoyang; Duan, Yingfeng; Qiu, Jieshan

doi:10.1016/j.jcis.2021.12.191

Cited by 23 publications

(7 citation statements)

References 53 publications

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“…According to Figure 3a, high‐resolution N 1s spectra were fitted into five peaks, namely pyridinic N at 397.6 eV, Metallic N at 398.4 eV, pyrrolic N at 399.5 eV, graphitic N at 400.4 eV, and Oxidized N at 404 eV. [ 15a,31 ] Nitrogen species of Metallic N, pyridinic N, and graphitic N are generally recognized as ORR active sites due to lone electron pairs which can adsorb oxygen molecules during that reaction. [ 4b ] According to Figure S2c (Supporting Information), FeNi/TNCF‐2 has the highest pyridine nitrogen content, resulting in more ORR active sites available on its surface.…”

Section: Resultsmentioning

confidence: 99%

“…Carbon materials are often used as electrocatalyst supports for due to their large specific surface area, good electrical conductivity, and stability. Supporting metals on carbon materials, such as carbon nanotubes (CNTs), graphene oxide (rGO), and porous carbon can enhance electrocatalytic performance due to their high electrical conductivity, [ 15–17 ] specific surface area and porosity, which facilitate mass transfer and provide more active surface sites. [ 12a ] During electrochemical processes, a catalyst is affected by the applied potential as well as by adsorption and desorption of an electrolyte/active material, causing catalyst corrosion, which affects its long term performance.…”

Section: Introductionmentioning

confidence: 99%

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Foamed Carbon‐Supported Nickel‐Iron Oxides Interspersed with Bamboo‐Like Carbon Nanotubes for High‐Performance Rechargeable Zinc‐Air Batteries

Wang

et al. 2022

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Foamed Carbon‐Supported Nickel‐Iron Oxides Interspersed with Bamboo‐Like Carbon Nanotubes for High‐Performance Rechargeable Zinc‐Air Batteries

Wang

et al. 2022

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“…High-resolution C 1s spectra of all the samples can be fitted and assigned to the three species: C─C (284.8 AE 0.2 eV), C─N (286.0 AE 0.2 eV), and C─O (288.3 AE 0.2 eV) (Figure 3b, S3b, S4b, and S5b, Supporting Information). [60,62] The binding energies of two forms of F 1s deconvoluted spectra, namely ionic and semi-ionic, for the catalyst are depicted in Figure 3c and S4c, Supporting Information. In different forms of ionic, the semi-ionic F form has higher ORR-activity compared with ionic because the semi-ionic form enables a greater degree of polarization of the C─C bond.…”

Section: Resultsmentioning

confidence: 99%

Preparation of F and N Co‐Doped Fe–N–C Catalyst and Evaluation of its Oxygen Reduction Performance

Chang

et al. 2022

Energy Tech

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The problems of underdeveloped pores and high electrochemical impedance of oxygen reduction reaction (ORR) catalysts need to be urgently addressed. Heteroatoms F and N are doped on precursor Fe‐zeolitic imidazolate framework (ZIF)‐8 to increase the activity of Fe‐ZIF‐8‐derived porous carbon materials and a noble metal‐free high‐activity ORR catalyst F–N/FeNC with 3D interconnected porous structure and high conductivity is successfully prepared. Experiments show that the synergistic effect of CF ionic bonds, pyridinic‐N, pyrrolic‐N, graphitic‐N, FeNx sites, and CF semi‐ionic bonds in F–N/FeNC can improve the ORR activity of the F–N/FeNC. The developed F–N/FeNC is advantageous with excellent specific surface area, ultra‐high electrical conductivity, and extremely high ORR mass transfer efficiency. As such, the F–N/FeNC has a high onset potential of 0.95 V (vs RHE) and a half‐wave potential of 0.84 V (vs RHE), implying excellent ORR performance even better than commercially available Pt/C catalyst. In addition, the carefully prepared F–N/FeNC demonstrated higher long‐term durability and excellent resistance to methanol influence compared with commercially available Pt/C catalyst. The developed strategy provides new insights into heteroatom‐doped metal–organic frameworks as a precursor of ORR catalysts.

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“…The choice of initial structural elements significantly affects the pore size and specific surface area, and this creates the possibility of preparing materials with the required physicochemical properties. 29 Nowadays, numerous methods have been proposed to prepare MOF-based catalysts and photocatalysts, including conventional hydro/solvothermal, 30,31 microwave, 32 electrochemical, 33 mechanochemical, 34 and sonochemical. 35,36 Solvothermal synthesis remains the most popular strategy due to its higher yield, better crystallinity of product, and the ability to control the preparation conditions, allowing for the development of reproducible protocols.…”

Section: Mof-based Photocatalystsmentioning

confidence: 99%

Metal–organic framework‐based heterojunction photocatalysts for organic pollutant degradation: design, construction, and performances

Belousov

Fukina

Koryagin

2022

J of Chemical Tech & Biotech

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Heterogeneous photocatalysis has been considered one of the most attractive alternative routes to transforming naturally abundant, clean, and sustainable solar energy into chemical energy. Nowadays, the most popular heterogeneous photocatalyst, titanium dioxide, has already found applications for water splitting to produce hydrogen and oxygen, for the degradation of organic pollutants, for air purification, and for the creation of self‐cleaning coatings. However, TiO2 has a significant limitation: a large band gap (3.0–3.4 eV) that makes it impossible to use anything other than ultraviolet illumination to initiate photocatalytic processes. With a focus on efficient solar‐energy utilization, the development of new photocatalysts that are sensitive to visible light is an important direction in the theory and practice of heterogeneous photocatalysis. In this regard, the use of metal–organic frameworks (MOFs) is an attractive route; they have emerged as an interesting class of materials for applications in photoreactions due to their flexible tunability in composition, structure, and functional properties, along with their facilitated adsorption towards chemicals and their efficient light absorption. Moreover, they can be composed with other semiconductors to produce heterojunctions (e.g., type‐II, Z‐scheme, and S‐scheme), whose effectiveness in photogenerated charge separation has already been proven by many examples. The present critical review reports progress over the last 5 years in the preparation and activity of metal–organic framework‐based heterojunction photocatalysts for the degradation of organic pollutants. © 2022 Society of Chemical Industry (SCI).

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Mechanochemical coordination self-assembly for Cobalt-based metal-organic framework-derived bifunctional oxygen electrocatalysts

Cited by 23 publications

References 53 publications

Foamed Carbon‐Supported Nickel‐Iron Oxides Interspersed with Bamboo‐Like Carbon Nanotubes for High‐Performance Rechargeable Zinc‐Air Batteries

Foamed Carbon‐Supported Nickel‐Iron Oxides Interspersed with Bamboo‐Like Carbon Nanotubes for High‐Performance Rechargeable Zinc‐Air Batteries

Preparation of F and N Co‐Doped Fe–N–C Catalyst and Evaluation of its Oxygen Reduction Performance

Metal–organic framework‐based heterojunction photocatalysts for organic pollutant degradation: design, construction, and performances

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