Yolk-shell ZIF-8@ZIF-67 derived Co3O4@NiCo2O4 catalysts with effective electrochemical properties for Li-O2 batteries

Zhao, Yajun; Ding, Lei; Wang, Xiaomin; Yang, Xiaofeng; He, Jianbo; Yang, Baocheng; Wang, Bainian; Zhang, Dawei; Li, Zhiwei

doi:10.1016/j.jallcom.2020.157945

Cited by 29 publications

(11 citation statements)

References 39 publications

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“…Zhao et al selected ZIF-8@ZIF-67 as the template to successfully prepare Co 3 O 4 with retainment of rhombic dodecahedron structure by two-step pyrolysis in argon and air, respectively. [36] A hybrid nanostructure containing CoP nanoparticles embedded in a nitrogen-doped carbon is prepared through a phosphorization treatment of Co, N-codoped carbon that is derived from core-shell ZIF-8@ZIF-67 composite by pyrolysis. [37] More importantly, the resultant Co, N-doped carbon materials can maintain the well-defined rhombic dodecahedral structures of ZIF-8@ZIF-67 composite.…”

Section: Introductionmentioning

confidence: 99%

Ruthenium Supported on Cobalt‐Embedded Porous Carbon with Hollow Structure as Efficient Catalysts toward Ammonia‐Borane Hydrolysis for Hydrogen Production

Cui

Qiu

et al. 2021

Advanced Sustainable Systems

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Catalysts with high activity play an indispensable role in ammonia‐borane (AB) hydrolysis for hydrogen production. Supported catalysts are always used because proper support can effectively prevent metal particle agglomeration. In addition, the interaction between support and metal species can further enhance the catalytic activity. Herein, cobalt‐embedded porous carbon with polyhedral structure (CoPCP) is successfully synthesized by one‐step carbonization of a core‐shell structured ZIF‐8@ZIF‐67 composite. As support, Ru nanoparticles are loaded on CoPCP by in situ reduction to obtain Ru/CoPCP catalysts with a special hollow structure, effectively preventing Ru nanoparticles from agglomeration. Moreover, the existence of synergistic effect between Co metal and Ru nanoparticles in Ru/CoPCP catalyst is confirmed by a series of well‐designed control experiments. Both these factors endow the Ru/CoPCP catalyst with high activity and decent stability toward AB hydrolysis. A low activation energy (Ea = 31.25 kJ mol–1) and a high catalytic performance (turnover frequency = 243.4 molH2 molRu–1 min–1) are simultaneously achieved for Ru1/CoPCP‐1000 even with a low amount of Ru (1.88 wt%). This work represents a promising method to prepare the high‐activity catalysts with low content of noble metals for diverse applications in heterogeneous catalysis.

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Section: Introductionmentioning

confidence: 99%

Ruthenium Supported on Cobalt‐Embedded Porous Carbon with Hollow Structure as Efficient Catalysts toward Ammonia‐Borane Hydrolysis for Hydrogen Production

Cui

Qiu

et al. 2021

Advanced Sustainable Systems

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“…Meanwhile, ZIF-67-derived carbon materials have a higher mesopore volume and higher degree of graphitization, showing excellent electrical conductivity. Moreover, the inevitable Co residue in the structure would be helpful for facilitating the electrochemical reactions by lowering the overpotential during cycling [ 38 ]. Herein, we demonstrate bimetallic ZIF-derived carbon materials to combine the advantages of both ZIF-8- and ZIF-67-derived carbon materials.…”

Section: Introductionmentioning

confidence: 99%

Nanoarchitectonics of the cathode to improve the reversibility of Li–O₂ batteries

Pham¹,

Yun²,

Kim³

et al. 2022

Beilstein J. Nanotechnol.

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The strategic design of the cathode is a critical feature for high-performance and long-lasting reversibility of an energy storage system. In particular, the round-trip efficiency and cycling performance of nonaqueous lithium–oxygen batteries are governed by minimizing the discharge products, such as Li2O and Li2O2. Recently, a metal–organic framework has been directly pyrolyzed into a carbon frame with controllable pore volume and size. Furthermore, selective metallic catalysts can also be obtained by adjusting metal ions for outstanding electrochemical reactions. In this study, various bimetallic zeolitic imidazolate framework (ZIF)-derived carbons were designed by varying the ratio of Zn to Co ions. Moreover, carbon nanotubes (CNTs) are added to improve the electrical conductivity further, ultimately leading to better electrochemical stability in the cathode. As a result, the optimized bimetallic ZIF–carbon/CNT composite exhibits a high discharge capacity of 16,000 mAh·g−1, with a stable cycling performance of up to 137 cycles. This feature is also beneficial for lowering the overpotential of the cathode during cycling, even at the high current density of 2,000 mA·g−1.

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“…Transition metal oxide Co 3 O 4 plays an important role in data storage, sensing, and especially catalysis due to the rich surface structures. However, the low carrier mobility and high resistivity (ρ > 1 × 10 6 Ω cm) of Co 3 O 4 severely limit the related applications. , Crystal facet and cation/anion vacancy engineering have been proven to be effective in performance improvement. − Adjusting the exposed surface dramatically promotes the electrochemical properties of Co 3 O 4 by modifying the number of active sites and the atomic oxidation state of Co species. , The catalytic activity of {111}- and {112}-enclosed Co 3 O 4 nanocrystals is better than those enclosed by {100} and {110} facets. ,, The corrosion rate of different Co 3 O 4 planes increases in the order of (001) < (111) < (011) .…”

Section: Introductionmentioning

confidence: 99%

“…Transition metal oxide Co 3 O 4 plays an important role in data storage, 1 sensing, 2 and especially catalysis 3 due to the rich surface structures. However, the low carrier mobility and high resistivity (ρ > 1 × 10 6 Ω cm) of Co 3 O 4 severely limit the related applications.…”

Section: ■ Introductionmentioning

confidence: 99%

Tuning the Semiconducting Properties in Co₃O₄/PMN–PT Heterostructures by Oxygen Vacancies and Domain Structure

Wang

Chen

et al. 2022

ACS Appl. Electron. Mater.

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Epitaxial Co3O4 films with various oxygen vacancy densities were deposited on the (001)-, (011)-, and (111)-0.7Pb(Mg1/3Nb2/3)–0.3PbTiO3 (PMN–PT) substrates to modulate the electrical properties. Experiment and calculation results demonstrate that the oxygen vacancies can reduce the resistivity of Co3O4 films. Meanwhile, the resistivity of Co3O4 films decreases in the order of (111) > (011) > (001) due to the various ferroelectric domain densities of PMN–PT substrates. The Co3O4/PMN–PT (001) heterostructure exhibits the lowest resistivity of 1.7 Ω cm at room temperature under the influence of oxygen vacancies and the ferroelectric domain. The maximum relative resistance variation of Co3O4 films reaches 200% under an external electric field as the result of the ferroelectric-field effect and the migration of oxygen vacancies. This work provides a powerful way to modulate the electrical properties of Co3O4 films and further broadens the application of Co3O4.

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Yolk-shell ZIF-8@ZIF-67 derived Co3O4@NiCo2O4 catalysts with effective electrochemical properties for Li-O2 batteries

Cited by 29 publications

References 39 publications

Ruthenium Supported on Cobalt‐Embedded Porous Carbon with Hollow Structure as Efficient Catalysts toward Ammonia‐Borane Hydrolysis for Hydrogen Production

Ruthenium Supported on Cobalt‐Embedded Porous Carbon with Hollow Structure as Efficient Catalysts toward Ammonia‐Borane Hydrolysis for Hydrogen Production

Nanoarchitectonics of the cathode to improve the reversibility of Li–O₂ batteries

Tuning the Semiconducting Properties in Co₃O₄/PMN–PT Heterostructures by Oxygen Vacancies and Domain Structure

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Yolk-shell ZIF-8@ZIF-67 derived Co3O4@NiCo2O4 catalysts with effective electrochemical properties for Li-O2 batteries

Cited by 29 publications

References 39 publications

Ruthenium Supported on Cobalt‐Embedded Porous Carbon with Hollow Structure as Efficient Catalysts toward Ammonia‐Borane Hydrolysis for Hydrogen Production

Ruthenium Supported on Cobalt‐Embedded Porous Carbon with Hollow Structure as Efficient Catalysts toward Ammonia‐Borane Hydrolysis for Hydrogen Production

Nanoarchitectonics of the cathode to improve the reversibility of Li–O2 batteries

Tuning the Semiconducting Properties in Co3O4/PMN–PT Heterostructures by Oxygen Vacancies and Domain Structure

Contact Info

Product

Resources

About

Nanoarchitectonics of the cathode to improve the reversibility of Li–O₂ batteries

Tuning the Semiconducting Properties in Co₃O₄/PMN–PT Heterostructures by Oxygen Vacancies and Domain Structure