Zeolitic imidazolate framework-67 derived ultra-small CoP particles incorporated into N-doped carbon nanofiber as efficient bifunctional catalysts for oxygen reaction

Feng, Ligang; Ding, Ruifu; Chen, Yiwen; Wang, Jiawei; Xu, Li

doi:10.1016/j.jpowsour.2020.227837

Cited by 89 publications

(24 citation statements)

References 58 publications

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“…The characteristic peaks of G band and D band were clearly observed. [19] The G peak located at 1580 cm À 1 coming from the first-order Raman band of all sp 2 hybridized graphitic materials, and the D peak located at 1348 cm À 1 indicating the defect activated band in sp 2 hybridized carbon materials. The higher intensity of the D band (I D / I G ) in the catalyst indicated the higher defects or disorder in the graphene materials.…”

Section: Resultsmentioning

confidence: 99%

An Efficient RuTe₂/Graphene Catalyst for Electrochemical Hydrogen Evolution Reaction in Acid Electrolyte

Yang

Feng

2020

Chemistry An Asian Journal

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Developing efficient powder catalysts for hydrogen evolution reaction (HER) in the acidic electrolyte is significant for hydrogen generation in the proton exchange membrane (PEM) water electrolysis technique. Herein, we demonstrated an efficient catalyst for HER in the acid media based on the graphene supported ruthenium telluride nanoparticles (RuTe2/Gr). The catalysts were easily fabricated by a facile microwave irradiation/thermal annealing approach, and orthorhombic RuTe2 crystals were found anchored over the graphene surface. The defective structure was demonstrated in the aberration‐corrected transmission electron microscopy images for RuTe2 crystals and graphene support. This catalyst required an overpotential of 72 mV to drive 10 mA cm−2 for HER when loading on the inert glass carbon electrode; Excellent catalytic stability in acidic media was also observed to offer 10 mA cm−2 for 10 hours. The Volmer‐Tafel mechanism was indicated on RuTe2/Gr catalyst by Tafel slope of 33 mV dec−1, similar to that of Pt/C catalysts. The high catalytic performance of RuTe2/Gr could be attributed to its high dispersion on the graphene surface, high electrical conductivity and low charge transfer resistance. This powder catalyst has potential application in the PEM water electrolysis technique because of its low cost and high stability.

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Section: Resultsmentioning

confidence: 99%

An Efficient RuTe₂/Graphene Catalyst for Electrochemical Hydrogen Evolution Reaction in Acid Electrolyte

Yang

Feng

2020

Chemistry An Asian Journal

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“…fabricated hybrid CoP/NC catalyst, derived by combining polyacrylonitrile‐cobalt acetate (synthesized by electrostatic spinning) and 2‐methylimidazole in ethanol solution, followed by phosphidation. [ 90 ] The morphological analysis revealed the in situ growth of CoP nanoparticles and the surface of PAN‐Co(AC) 2 nanofibers was smooth and clean before the growth. On the other hand, the surface of nanofibers turned rough with the growth of ZIF‐67 crystals.…”

Section: Recent Advances Of Zif‐derived Electrocatalysts As Air Electrodes For Zabsmentioning

confidence: 99%

Advances in Zeolite Imidazolate Frameworks (ZIFs) Derived Bifunctional Oxygen Electrocatalysts and Their Application in Zinc–Air Batteries

Arafat

Azhar

Zhong

et al. 2021

Advanced Energy Materials

154

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The fast growth in human population and the quick cultural advancement of human society leads to the tremendous increase in energy demand. [1] During the past, fossil fuels were used as the main energy sources, while their excessive use based on the conventional combustion technology releases excessive greenhouse gases into the environment, causing adverse impact on the sustainability of ecosystem. To cope with the challenges of stringent environmental legislations and the reliance on fossil fuels, renewable Secondary Zn-air batteries (ZABs) are recognized as one of the most promising power sources for the future with lucrative features of low cost, high energy density, eco-friendliness, and high safety. However, the widespread implementation of ZABs is still hampered by the sluggish oxygen redox reactions. Thus the deployment of cost-effective and highly efficient air electrodes to substitute precious metals (Pt/Ir), is highly challenging, however, highly desired. Zeolitic imidazolate frameworks (ZIFs) are emerging functional materials, which demonstrate several outstanding characteristics, such as high specific surface area, high conductivity, self-doped N, open pore structure, versatile compositions and favourable chemical stability. Through varying the metal/organic moiety or by employing different synthesis protocols, ZIFs with different properties could be obtained. Being adaptable, desired functionalities may be further incorporated into ZIFs through pre-treatment, in situ treatment, and post treatment. Thus, ZIFs are the ideal precursors for the preparation of variety of bi-functional air electrodes for ZABs by materials tuning, morphological control, or by materials hybridization. Here, the recent advances of ZIFs-based materials are critically surveyed from the perspective of synthesis, morphology, structure and properties, and correlated with performance indicators of ZABs. Finally, the major challenges and future prospects of ZIFs associated with ZABs are discussed.

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“…M OOH e is the rate-determining step. [39,40] Among the NiFe-based vanadates with different crystallinities, the heterophase NiFe-VO x -0.5 exhibits an overpotential of 267 mV at the current density of 10 mA cm −2 , which is much lower than that of the amorphous NiFe-VO x -0.1 (320 mV), crystalized NiFe-VO x -1 (274 mV), and NiFe-VO x -2 (296 mV), and even comparable to the commercial RuO 2 (268 mV) (Figure 4e). The similar Tafel slopes of NiFe-VO x -0.5 (38 mV per decade), NiFe-VO x -1 (40 mV per decade), and NiFe-VO x -0.1 (45 mV per decade) indicate the similar intrinsic activity of NiFe centers (Figure 4f).…”

Section: O Ohmentioning

confidence: 99%

Assembling and Regulating of Transition Metal‐Based Heterophase Vanadates as Efficient Oxygen Evolution Catalysts

Shao

Xiao

Yang

et al. 2021

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Developing efficient, durable, and low‐cost earth‐abundant elements‐based oxygen evolution reaction (OER) catalysts by rapid and scalable strategies is of great importance for future sustainable electrochemical hydrogen production. The earth‐abundant high‐valency metals, especially vanadium, can modulate the electronic structure of 3d metal oxides and oxyhydroxides and offer the active sites near‐optimal adsorption energies for OER intermediates. Here, the authors propose a facile assembling and regulating strategy to controllably synthesize a serial of transition metal (CoFe, NiFe, and NiCo)‐based vanadates for efficient OER catalysis. By tuning the reaction concentrations, NiFe‐based vanadates with different crystallinities can be facilely regulated, where the catalyst with moderate heterophase (mixed crystalline and amorphous structures) shows the best OER catalytic activity in terms of low overpotential (267 mV at the current density of 10 mA cm−2), low Tafel slope (38 mV per decade), and excellent long‐term durability in alkaline electrolyte, exceeding its noble metal‐based counterparts (RuO2) and most current existing OER catalysts. This work not only reports a facile and controllable method to synthesize a series of vanadates‐based catalysts with heterophase nanostructures for high‐performance OER catalysis, but also may expand the scope of designing cost‐effective transition metal‐based electrocatalysts for water splitting.

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Zeolitic imidazolate framework-67 derived ultra-small CoP particles incorporated into N-doped carbon nanofiber as efficient bifunctional catalysts for oxygen reaction

Cited by 89 publications

References 58 publications

An Efficient RuTe₂/Graphene Catalyst for Electrochemical Hydrogen Evolution Reaction in Acid Electrolyte

An Efficient RuTe₂/Graphene Catalyst for Electrochemical Hydrogen Evolution Reaction in Acid Electrolyte

Advances in Zeolite Imidazolate Frameworks (ZIFs) Derived Bifunctional Oxygen Electrocatalysts and Their Application in Zinc–Air Batteries

Assembling and Regulating of Transition Metal‐Based Heterophase Vanadates as Efficient Oxygen Evolution Catalysts

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Zeolitic imidazolate framework-67 derived ultra-small CoP particles incorporated into N-doped carbon nanofiber as efficient bifunctional catalysts for oxygen reaction

Cited by 89 publications

References 58 publications

An Efficient RuTe2/Graphene Catalyst for Electrochemical Hydrogen Evolution Reaction in Acid Electrolyte

An Efficient RuTe2/Graphene Catalyst for Electrochemical Hydrogen Evolution Reaction in Acid Electrolyte

Advances in Zeolite Imidazolate Frameworks (ZIFs) Derived Bifunctional Oxygen Electrocatalysts and Their Application in Zinc–Air Batteries

Assembling and Regulating of Transition Metal‐Based Heterophase Vanadates as Efficient Oxygen Evolution Catalysts

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An Efficient RuTe₂/Graphene Catalyst for Electrochemical Hydrogen Evolution Reaction in Acid Electrolyte

An Efficient RuTe₂/Graphene Catalyst for Electrochemical Hydrogen Evolution Reaction in Acid Electrolyte