An advantage combined strategy for preparing bi-functional electrocatalyst in rechargeable zinc-air batteries

Wang, Ying; Qiao, Mengfei; Mamat, Xamxikamar

doi:10.1016/j.cej.2020.126214

Cited by 21 publications

(16 citation statements)

References 48 publications

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“…The peaks located at 780.1, 796.1/781.1, and 797.1/782.7 eV are respectively assigned to metallic Co 0 , Co 2+ , and Co 3+ , while the three peaks show up at 786.3, 790.0, and 802.9 eV are shakeup satellite peaks. The reversible redox reaction between Co 2+ and Co 3+ is believed to be important for the electrocatalytic activity of MPC@Cobi. − In the N 1s spectrum, four characteristic peaks associated with pyridinic N (398.0 eV), Co–N (399.0 eV), pyrrolic N (400.4 eV), and graphitic N (401.2 eV) are deconvolved (Figure d). The Co–N bonding should be mainly inherited from the incorporated Co-bipy complexes, the existence of which suggests the formation of Co-N x sites in the structure of MPC@Cobi.…”

Section: Resultsmentioning

confidence: 99%

Constructing Porous Carbon Electrocatalysts from Cobalt Complex-Decorated Micelles of Mesoporous Silica for Oxygen Reduction/Evolution Reaction

Fan

Zhang

et al. 2021

Inorg. Chem.

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The construction of a porous carbon structure with a high specific surface area is conducive to enhanced electrocatalytic activity due to the accessibility of active sites and improvement of the mass transfer. Herein, we explored the possibility of using micelles of mesoporous silica (MCM-48) as the carbon source to generate porous carbon under the confinement of MCM-48 channels. The complexes formed by Co2+ and 4,4′-bipyridine were in situ incorporated into the micelles to derive Co-related active sites (Co-N x , Co, and Co3O4) for catalyzing the oxygen reduction reaction (ORR) and oxygen evolution reaction (OER). After pyrolysis in the N2 atmosphere and subsequent removal of the MCM-48 skeleton, the target porous carbon electrocatalyst was obtained, which exhibited promising performance for both ORR and OER and has great potential as the cathode material for Zn–air battery application. This work not only confirms the effectiveness of using the micelles of MCM-48 as the carbon source for preparing the porous carbon materials, but also provides a new platform for design and synthesis of structurally controllable materials for energy-related electrocatalytic applications.

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Section: Resultsmentioning

confidence: 99%

Constructing Porous Carbon Electrocatalysts from Cobalt Complex-Decorated Micelles of Mesoporous Silica for Oxygen Reduction/Evolution Reaction

Fan

Zhang

et al. 2021

Inorg. Chem.

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“…25 The thin nanosheet structures can expose more active sites, and the hierarchical porous structure has great advantages in exposing active centers, and diffusing reactants and electrolytes. [26][27][28] Based on above status analyses, this review introduces the synthetic strategies and applications in energy devices of biomass-derived carbon-based materials. The summary of this review is shown in Scheme 1 and Fig.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Recent advances of biomass derived carbon-based materials for efficient electrochemical energy devices

et al. 2022

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“…They can not only remove the restriction of the adsorption and diffusion of reactants due to the MOF-derived pore structure with absent mesopores and macropores , but also can reduce the transmission distance of electrolytes in 3D electrodes and improve the number of active sites exposed . Therefore, we propose a directional freeze-casting combined with an MOF-derived strategy to develop the 3D ordered hierarchical porous carbon aerogel (OHPCA), maximizing the catalytic performance …”

Section: Introductionmentioning

confidence: 99%

Freestanding 3D Ordered Hierarchical Porous Carbon Aerogel Cathodes for Efficient Electrocatalytic Dechlorination of 1,2-Dichloroethane to Ethylene

Guo

Fan

et al. 2022

ACS Sustainable Chem. Eng.

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Electrochemical dechlorination of 1,2-dichloroethane (DCE) to produce high-value ethylene is an efficient and economic strategy to reduce carbon emission. However, it is challenging to completely realize high-efficiency ethylene production due to the lack of high-performance catalysis. Herein, a directional freeze-casting and metal–organic framework-derived synergistic strategy was reported to construct a 3D ordered hierarchical porous carbon aerogel (OHPCA) with excellent mechanical properties. The as-prepared aerogel was used as a freestanding flexible electrode for electrocatalytic dechlorination of DCE. OHPCA possessed a higher Faradaic efficiency and ethylene selectivity than others due to the synergistic effects between directional ordered channels and hierarchical pore structures. Combining the stability experiments and characterizations, we found that the ordered hierarchical porous architecture possessed superior stability. This work offers a new approach to construct 3D OHPCA electrodes and provides a reference to design and synthesize highly effective carbon-based electrocatalysts.

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An advantage combined strategy for preparing bi-functional electrocatalyst in rechargeable zinc-air batteries

Cited by 21 publications

References 48 publications

Constructing Porous Carbon Electrocatalysts from Cobalt Complex-Decorated Micelles of Mesoporous Silica for Oxygen Reduction/Evolution Reaction

Constructing Porous Carbon Electrocatalysts from Cobalt Complex-Decorated Micelles of Mesoporous Silica for Oxygen Reduction/Evolution Reaction

Recent advances of biomass derived carbon-based materials for efficient electrochemical energy devices

Freestanding 3D Ordered Hierarchical Porous Carbon Aerogel Cathodes for Efficient Electrocatalytic Dechlorination of 1,2-Dichloroethane to Ethylene

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