ZIF-67-derived hollow nanocages with layered double oxides shell as high-Efficiency catalysts for CO oxidation

Kong, Wenpeng; Li, Jing; Chen, Yao; Ren, Yuqing; Guo, Yonghua; Niu, Shengli; Yang, Yanzhao

doi:10.1016/j.apsusc.2017.12.158

Cited by 46 publications

(21 citation statements)

References 37 publications

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“…Figure 2A exhibits the X-ray diffraction (XRD, Rigaku Smart Lab, Japan) pattern of H-(Ni, Co)-LDHP and ZIF-67 precursor. The XRD pattern of ZIF-67 corresponds to previous report very well (Kong et al, 2018 ). Regarding H-(Ni, Co)-LDHP, the peaks located at 11.6, 23.8, 33.7, and 60.4° are ascribed to (003), (006), (009), and (110) crystal plane of hydrotalcite-like NiCo-LDH (Jiang et al, 2013 ).…”

Section: Resultssupporting

confidence: 87%

Template-Sacrificing Synthesis of Ni-Co Layered Double Hydroxides Polyhedron as Advanced Anode for Lithium Ions Battery

2020

Front. Chem.

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The novel hollowed Ni-Co layered double hydroxide polyhedron (H-(Ni, Co)-LDHP) is synthesized via a template-sacrificing approach using ZIF-67 as template. The morphology, crystallinity, porous texture, and chemical state of H-(Ni, Co)-LDHP are examined. It demonstrates that the H-(Ni, Co)-LDHP not only provides rich redox sites but also promotes the kinetics due to presence of numerous rational channels. As a result, the H-(Ni, Co)-LDHP manifests the desirable lithium ions storage performance when employed as anode. This study paves a new way for preparing hollowed nanostructure toward advanced electrochemical applications.

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Section: Resultssupporting

confidence: 87%

Template-Sacrificing Synthesis of Ni-Co Layered Double Hydroxides Polyhedron as Advanced Anode for Lithium Ions Battery

2020

Front. Chem.

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“…The morphology of the as-synthesized ZIF-67 and ZIF-67@Co 3 (PO 4 ) 2 was examined by scanning electron microscopy (SEM). As shown in Figure a, ZIF-67 exhibits a rhombic dodecahedron structure, which is consistent with a previous report . As shown in Figure b, the ZIF-67@Co 3 (PO 4 ) 2 composite maintains a 3D structure similar to that of ZIF-67, thus indicating the preservation of the ZIF-67 framework in ZIF-67@Co 3 (PO 4 ) 2 .…”

Section: Resultssupporting

confidence: 90%

“…As shown in Figure 1a, ZIF-67 exhibits a rhombic dodecahedron structure, which is consistent with a previous report. 42 As shown in Figure 1b, the ZIF-67@Co 3 (PO 4 ) 2 composite maintains a 3D structure similar to that of ZIF-67, thus indicating the preservation of the ZIF-67 framework in ZIF-67@Co 3 (PO 4 ) 2 . The high-resolution transmission elec-tron microscopy (HRTEM) image in Figure 1c indicates the successful generation of a yolk−shelled structure for ZIF-67@ Co 3 (PO 4 ) 2 .…”

Section: Resultsmentioning

confidence: 78%

Amorphous Yolk–Shelled ZIF-67@Co₃(PO₄)₂ as Nonprecious Bifunctional Catalysts for Boosting Overall Water Splitting

Chen

Jiang

et al. 2021

Inorg. Chem.

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It is challenging to generate inexpensive and noble metal-free catalysts for efficient overall water splitting (OWS). To achieve this goal, suitable tuning of the structure and composition of electrocatalytic materials is a promising approach that has attracted much attention in recent years. Herein, novel hybrid amorphous ZIF-67@Co 3 (PO 4 ) 2 electrocatalysts with yolk−shell structures were prepared using a reflux method. It is demonstrated that yolk−shelled ZIF-67@Co 3 (PO 4 ) 2 is not only an active catalyst for the hydrogen evolution reaction (HER) but also an efficient catalyst for the oxygen evolution reaction (OER). The optimized composite electrode showed superior performance with low overpotentials of 73 and 334 mV @ 10 mA•cm −2 toward HER and OER, respectively, and a low potential of 1.62 V @ 10 mA• cm −2 and 1.66 V @ 30 mA•cm −2 in a practical OWS test under alkaline conditions. N−O bonds were formed to connect the two components of ZIF-67 and Co 3 (PO 4 ) 2 in the composite ZIF-67@Co 3 (PO 4 ) 2 , which indicates that the two components are synergistic but not isolated, and this synergistic effect may be one of the important reasons to boost the oxygen and hydrogen evolution performances of the hybrid. Based on experimental data, the high electrocatalytic performance was inferred to be related to the unique structure of ZIF-67, tuning the ability of Co 3 (PO 4 ) 2 and synergism between ZIF-67 and Co 3 (PO 4 ) 2 . The preparation strategy reported herein can be extended for the rational design and synthesis of cheap, active, and long-lasting bifunctional electrocatalysts for OWS and other renewable energy devices.

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“…19 To estimate the thermal stability of synthesized ZIF-67 and Co 3 O 4 , thermogravimetric studies were carried out from 0 C to 250 C. A rapid weight loss at the initial temperature zone is due to the loss of water molecules and solvents in the ZIF-67 moiety. The structure of metal organic framework was collapsed at 210 C, whereas the Co 3 O 4 started collapsing at 280 C. It shows that the thermal stability of Co 3 O 4 is high than ZIF-67 20 (Figure 9A). The specific heat value was calculated to be 0.548 and 0.714 W/g o C for ZIF-67 and Co 3 O 4 /C, respectively, as shown in Figure 9B.…”

Section: Surface Area and Thermogravimetric Analysismentioning

confidence: 99%

Mesoporous carbon‐supported CO ₃ O ₄ derived from Zif‐67 metal organic framework (MOF) for hydrogen evolution reaction in acidic and alkaline medium

Gothandapani

Grace

Velmurugan

2021

Intl J of Energy Research

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Coherent synthesis of metal organic frameworks (MOFs) employed as electrode materials for electrocatalytic hydrogen evolution reaction is the emerging trend in the production of clean energy. The present work focuses on MOFderived catalyst for hydrogen evolution reaction. Cobalt MOF (ZIF-67) is synthesized by chemical route, and carbon-supported Co 3 O 4 is derived from ZIF-67. The hydrogen evolution reaction is carried out in basic and alkaline medium using carbon-supported Co 3 O 4 as an electrode. The electrochemical investigation reveals the high activity for Co 3 O 4 /C in basic medium, whichshows high rate of kinetics than the ZIF-67. The Tafel slope of the Co 3 O 4 /C was calculated to be 68.37 mV dec À1 in basic medium and 71.66 mV dec À1 in acidic medium, which possess a low charge transfer resistance of 2.12 and 2.54 Ω, respectively. Results show that Co 3 O 4 /C in basic medium has high catalytic sites, which allows the catalyst to follow the Volmer-Heyrovsky mechanism as a rate limiting step.

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ZIF-67-derived hollow nanocages with layered double oxides shell as high-Efficiency catalysts for CO oxidation

Cited by 46 publications

References 37 publications

Template-Sacrificing Synthesis of Ni-Co Layered Double Hydroxides Polyhedron as Advanced Anode for Lithium Ions Battery

Template-Sacrificing Synthesis of Ni-Co Layered Double Hydroxides Polyhedron as Advanced Anode for Lithium Ions Battery

Amorphous Yolk–Shelled ZIF-67@Co₃(PO₄)₂ as Nonprecious Bifunctional Catalysts for Boosting Overall Water Splitting

Mesoporous carbon‐supported CO ₃ O ₄ derived from Zif‐67 metal organic framework (MOF) for hydrogen evolution reaction in acidic and alkaline medium

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ZIF-67-derived hollow nanocages with layered double oxides shell as high-Efficiency catalysts for CO oxidation

Cited by 46 publications

References 37 publications

Template-Sacrificing Synthesis of Ni-Co Layered Double Hydroxides Polyhedron as Advanced Anode for Lithium Ions Battery

Template-Sacrificing Synthesis of Ni-Co Layered Double Hydroxides Polyhedron as Advanced Anode for Lithium Ions Battery

Amorphous Yolk–Shelled ZIF-67@Co3(PO4)2 as Nonprecious Bifunctional Catalysts for Boosting Overall Water Splitting

Mesoporous carbon‐supported CO 3 O 4 derived from Zif‐67 metal organic framework (MOF) for hydrogen evolution reaction in acidic and alkaline medium

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Amorphous Yolk–Shelled ZIF-67@Co₃(PO₄)₂ as Nonprecious Bifunctional Catalysts for Boosting Overall Water Splitting

Mesoporous carbon‐supported CO ₃ O ₄ derived from Zif‐67 metal organic framework (MOF) for hydrogen evolution reaction in acidic and alkaline medium