A hexagonal 2D ZIF-Co-L variant: Unusual role of graphene oxide on the water-regulated morphology of ZIF hybrid and their derived Co@N-doped carbon electrocatalyst for hydrogen evolution reaction

Gayathri, Sampath; Arunkumar, Paulraj; Bose, Ranjith; Alfantazi, Akram; Han, Jong Hun

doi:10.1016/j.cej.2021.131270

Cited by 35 publications

(24 citation statements)

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“…). 14,28 Distinctively, the content changes of N1 and N2 components further confirm the increase of the structural disorder in the ZIF-L@Fe 28 composites as compared with the pristine ZIF-L (Fig. 4a and b).…”

supporting

confidence: 53%

A two-dimensional zeolitic imidazolate framework loaded with an acrylate-substituted oxoiron cluster as an efficient electrocatalyst for the oxygen evolution reaction

Xiao

2022

New J. Chem.

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supporting

confidence: 53%

A two-dimensional zeolitic imidazolate framework loaded with an acrylate-substituted oxoiron cluster as an efficient electrocatalyst for the oxygen evolution reaction

Xiao

2022

New J. Chem.

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“…The linear sweep voltammogram (Figure a) shows intuitively that Co/Zn-MOF-800 and Co-MOF@Zn-800 have a better HER performance than Co-MOF-800. Table S4 shows a comparison of the electrocatalytic performance of some recent Co-based MOFs. − The results show that compared with other reported MOF-derived materials, its electrocatalytic performance is still at a good level. As shown in Figure b, at a 10 mA cm –2 current density, the corresponding overpotentials of Pt/C, Co-MOF@Zn-800, Co-MOF-800, and Co/Zn-MOF-800 are 59, 218, 393, and 236 mV, respectively.…”

Section: Resultsmentioning

confidence: 99%

Improved the Electrocatalytic Hydrogen Evolution Performances of Co-MOF Derivatives Through Introducing Zinc Ions by Two Ways

et al. 2022

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Due to the high price and rareness of precious metal electrocatalysts, the preparation of cheap, high-efficiency nonprecious metal electrocatalysts is urgently needed. In this paper, a Co-metal-organic framework (MOF) has been synthesized by the hydrothermal method. In view of the poor electrocatalytic performance of pristine Co-MOF, we used it as a template and obtained the Co-MOF-800 electrocatalyst by high-temperature calcination at 800 °C under a nitrogen atmosphere. To further improve the electrocatalytic hydrogen evolution performance, we used two methods to synthesize cobalt/zinc bimetallic-based electrocatalysts. The first method is adding zinc ions to Co-MOF and stirring to obtain Co-MOF@Zn; the second method is adding zinc ions during the in situ synthesis to obtain Co/Zn-MOF. Finally, Co-MOF@Zn-800 and Co/Zn-MOF-800 were obtained by pyrolysis at 800 °C under a nitrogen atmosphere. The electrocatalytic hydrogen evolution results show that Co-MOF@Zn-800 and Co/Zn-MOF-800 obtained by doping and introducing zinc ions have larger specific surface areas of 369.837 and 347.898 m2 g–1, respectively, and better electrocatalytic hydrogen evolution performances in 0.5 M sulfuric acid. The overpotentials are 218 and 236 mV at a 10 mA cm–2 current density, and the Tafel slopes are 146.6 and 187.0 mV dec–1. After 40 h of stability testing, the Co-MOF@Zn-800 material still holds a nearly constant current density.

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“…The exceptional HER property of Co-NC@ 10RGO-leaf is because of the smaller proportion of Co-to-C/ RGO contents of Co-NC@10RGO-leaf and the synergistic effect of Co NPs and RGO, which heightens the active surface area, mass transport rate, and easy release of H 2 . 107 In 2020, Zhao and co-workers synthesized a Ni x Co 1−x P/RGO composite using a facile strategy of a phosphorization process under N 2 ambiance, which observed its use in the HER. The resultant Ni 0.14 Co 0.86 P/RGO displays the best catalytic capability toward the HER in 1.0 M KOH than the same series of other materials.…”

Section: Comof-based Composites Asmentioning

confidence: 99%

Compositional Engineering of Co(II)MOF/Carbon-Based Overall Water Splitting Electrocatalysts: From Synergistic Effects to Structure–Activity Relationships

Wang

Zhao

et al. 2022

Crystal Growth & Design

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Ranging from structure to property, the design of reasonable structures leading to high-performance electrochemical properties has enabled metal−organic frameworks (MOFs) to have great achievement in energy conversion. Since Co(II) has multiple valence states and is especially abundant, CoMOFs have emerged as latent materials of electrocatalysts in overall water splitting. In fact, CoMOFs/carbon-based hybrid materials (Co/CHMs) exhibit all kinds of architectures, marvelous electrochemical capabilities, and synergistic effects, overcoming the relative insulation of CoMOFs and single structure carbon materials. The synergistic effect of CoMOFs-based materials and carbon materials forming a unique interface can increase the specific surface area and accelerate electron transfer rates, resulting in enhanced overall water splitting. In terms of this review, the various Co/CHMs (carbon = GO/ RGO, CNT, and carbon black) are summarized. The relationship between the synergistic effect of Co/CHMs and the activity of overall water splitting is discussed. Finally, this review can supply a certain degree of reference for Co/CHMs as electrocatalysts in the field of overall water splitting and a number of helpful comments for prospective energy materials.

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A hexagonal 2D ZIF-Co-L variant: Unusual role of graphene oxide on the water-regulated morphology of ZIF hybrid and their derived Co@N-doped carbon electrocatalyst for hydrogen evolution reaction

Cited by 35 publications

References 50 publications

A two-dimensional zeolitic imidazolate framework loaded with an acrylate-substituted oxoiron cluster as an efficient electrocatalyst for the oxygen evolution reaction

A two-dimensional zeolitic imidazolate framework loaded with an acrylate-substituted oxoiron cluster as an efficient electrocatalyst for the oxygen evolution reaction

Improved the Electrocatalytic Hydrogen Evolution Performances of Co-MOF Derivatives Through Introducing Zinc Ions by Two Ways

Compositional Engineering of Co(II)MOF/Carbon-Based Overall Water Splitting Electrocatalysts: From Synergistic Effects to Structure–Activity Relationships

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