Effective Formation of a Mn-ZIF-67 Nanofibrous Network via Electrospinning: An Active Electrocatalyst for OER in Alkaline Medium

Sankar, Selvasundarasekar Sam; Bijoy, T. K.; Kumaravel, Sangeetha; Karmakar, Arun; Madhu, Ragunath; Bera, Krishnendu; Nagappan, Sreenivasan; Dhandapani, Hariharan N; Mersal, Gaber A.M.; Ibrahim, Mohamed M.; Sarkar, D.; Yusuf, S. M.; Lee, Seung‐Cheol; Kundu, Subrata

doi:10.1021/acsami.2c12643

Cited by 22 publications

(11 citation statements)

References 62 publications

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“…The work of these individuals provides ideas for the search for active centers in bimetallic site catalysts. 124 4.4. 1 show good electrocatalytic activity.…”

Section: Stability Of Mno Xmentioning

confidence: 99%

Manganese-based oxide electrocatalysts for the oxygen evolution reaction: a review

et al. 2023

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“…The work of these individuals provides ideas for the search for active centers in bimetallic site catalysts. 124 4.4. 1 show good electrocatalytic activity.…”

Section: Stability Of Mno Xmentioning

confidence: 99%

Manganese-based oxide electrocatalysts for the oxygen evolution reaction: a review

et al. 2023

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“…The peaks at 780.5 and 796 eV in the high-resolution Co 2p spectrum (Figure 2a−c) are attributed to Co 2p 3/2 and Co 2p 1/2 states, respectively. 32 The deconvolution exhibits two peaks under 780.5 at 780. Furthermore, the peak at 785.9 and 802 eV are satellite peaks indicating presence of Co 2+ state.…”

Section: Resultsmentioning

confidence: 99%

Poly(N-vinylpyrrolidone)-Assisted Crystal Growth of Zeolitic Imidazolate Framework (ZIF-67) and Electrochemical Properties of Its Derivatives for Flexible Supercapacitors

Jain,

Joshi,

Poddar

2024

Crystal Growth & Design

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A simple and explicit wet chemical method enables the roomtemperature crystallization of the zeolitic imidazolate framework (ZIF-67) using cotton-cloth (CC) as a substrate; where time-dependent Avrami's kinetic studies demonstrated sluggish nucleation and fast crystal growth resulting in unprecedented morphologies−truncated cubes [synthesized without poly(Nvinylpyrrolidone); PVP], and rhombic dodecahedra (with PVP) with average sizes ranging from 500 nm to 1.41 μm; wherein amphiphilic PVP plays a crucial function of structure directing agent by modulation of complex formation and deprotonation equilibria. To study the potential of pristine ZIF-67 (ZP0) and PVP-functionalized ZIF-67 (ZP50, ZP100, and ZP200) grown on the CC substrate for application as a flexible electrode in supercapacitors, ZP0, ZP50, ZP100, and ZP200 were annealed to form CZP0, CZP50, and CZP100, respectively. Areal capacitances of 181 and 214 mF•cm −2 were achieved at a current density of 1 mA•cm −2 and a potential window of 1.6 V for CZP0 and CZP100, respectively, and compared to the derivatives without PVP; CZP100 exhibited a superior energy density of 76.3 μWh•cm −2 and a capacitance retention of 84.3% after 5000 cycles at a current density of 0.5 mA•cm −2 .

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“…These observed lattice planes are exactly matched with the already reported simulated pattern of the ZIF structure which ensures the effective incorporation of bimetallic nickel and manganese ions into the imidazolate framework. 44,45 For comparing NiMn-ZIF-NFs with the powdered materials, the PXRD spectrum of NiMn-ZIF powder has also been taken and given as Figure S1. Here, the observed peaks are in good accordance with fiber materials.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

Boosting the Activity of the Oxygen Evolution Reaction through an Electrospun Nickel Manganese-Based Bimetallic Zeolite Imidazolate Framework Fibrous System in Alkaline Medium

et al. 2023

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Developing cost-efficient and noble metal free electrocatalysts is vastly anticipated for the oxygen evolution reaction (OER). Therefore, in this study, to lift the thermodynamic and kinetic activity of the OER, we attempted to synthesize a bimetallic nickel and manganese-based zeolite imidazolate framework system in a fiber form. For this synthesis, a bottom-up approach has been followed through wet chemical analysis, and electrospinning was utilized for fiber formation. The resultant fiber has shown a lesser overpotential of 256 mV at a benchmarking current density of 10 mA cm–2 under 1 M KOH conditions. As expected, the attained Tafel slope and charge transfer resistance values are lesser. The observed results reveal that the synergism between the Ni and Mn nodes on the imidazolate framework successfully promotes the thermodynamic formation of *O and *OOH intermediates, which significantly helps to improve the faster OER kinetics at the electrode–electrolyte interface.

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Effective Formation of a Mn-ZIF-67 Nanofibrous Network via Electrospinning: An Active Electrocatalyst for OER in Alkaline Medium

Cited by 22 publications

References 62 publications

Manganese-based oxide electrocatalysts for the oxygen evolution reaction: a review

Manganese-based oxide electrocatalysts for the oxygen evolution reaction: a review

Poly(N-vinylpyrrolidone)-Assisted Crystal Growth of Zeolitic Imidazolate Framework (ZIF-67) and Electrochemical Properties of Its Derivatives for Flexible Supercapacitors

Boosting the Activity of the Oxygen Evolution Reaction through an Electrospun Nickel Manganese-Based Bimetallic Zeolite Imidazolate Framework Fibrous System in Alkaline Medium

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