Diffusion driven nanostructuring of metal–organic frameworks (MOFs) for graphene hydrogel based tunable heterostructures: highly active electrocatalysts for efficient water oxidation

Maiti, Uday Narayan; Sikdar, Anirban; Majumdar, Abhisek; Gogoi, Abhijit; Dutta, Pronoy; Borah, Munindra; Maiti, Soumen; Gogoi, Chiranjib; Reddy, K. Anki; Oh, Youngtak

doi:10.1039/d0ta09077h

Cited by 23 publications

(12 citation statements)

References 42 publications

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“…The very low value of R ct for the selenide heterostructure confirms beneficial interfacial charge transfer which can activate HER at low overpotential. [46,47] Low R ct value can be related with the adequate electronic structure of the catalyst and open network structure of MoSe 2 @NiCo 2 Se 4 (Figure S2, Supporting Information) for beneficial mass transport and release of generated H 2 gas. [48] Together with the structural advantage that lead to high ECSA and beneficial release of generated gas, the heterostructure endow unique intrinsic electronic properties related with vertical orientation of MoSe 2 and its layer expanded structure, that gives rise to high HER activity.…”

Section: Her Catalytic Performancementioning

confidence: 99%

Impact of Atomic Rearrangement and Single Atom Stabilization on MoSe₂@NiCo₂Se₄ Heterostructure Catalyst for Efficient Overall Water Splitting

Majumdar

Dutta

Sikdar

et al. 2022

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High overpotentials required to cross the energy barriers of both hydrogen and oxygen evolution reactions (HER and OER) limit the overall efficiency of hydrogen production by electrolysis of water. The rational design of heterostructures and anchoring single‐atom catalysts (SAC) are the two successful strategies to lower these overpotentials, but realization of such advanced nanostructures with adequate electronic control is challenging. Here, the heterostructure of edge‐oriented molybdenum selenide (MoSe2) and nickel‐cobalt‐selenide (NiCo2Se4) realized through selenization of mixed metal oxide/hydroxide is presented. The as‐developed sheet‐on‐sheet heterostructure shows excellent HER performance, requiring an overpotential of 89 mV to get a current density 10 mA cm−2 and a Tafel slope of 65 mV dec−1. Further, resultant MoSe2@NiCo2Se4 is photochemically decorated with single‐atom iridium, which on electrochemical surface reconstruction displays outstanding OER activity, requiring only 200 and 313 mV overpotentials for 10 and 500 mA cm−2 current densities, respectively. A full cell electrolyzer comprising of MoSe2@NiCo2Se4 as cathode and its SAC‐Ir decorated counterpart as anode requires only 1.51 V to attain 10 mA cm−2 current density. Density functional theory calculation reveals the importance of rational heterostructure design and synergistic electronic coupling of single atom iridium in HER and OER processes, respectively.

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Section: Her Catalytic Performancementioning

confidence: 99%

Impact of Atomic Rearrangement and Single Atom Stabilization on MoSe₂@NiCo₂Se₄ Heterostructure Catalyst for Efficient Overall Water Splitting

Majumdar

Dutta

Sikdar

et al. 2022

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“…The superior HER activity of catalysts is attributed to the charge redistribution induced by boron and metal atoms. The Fe 2p spectra display noticeable peaks located at 711.78 eV (assigned to Fe 2p 3/2 ), as well as peaks at 726.66 eV (attributed to Fe 2p 1/2 ) (Figure c) . Based on the HRTEM, EDX element mapping, XRD, and XPS data, a structural model of Pt 3 Fe and B,N-containing active sites in Pt 3 Fe/BNC was successfully constructed (Figure d).…”

Section: Resultsmentioning

confidence: 99%

Pt₃Fe Nanoparticles on B,N-Codoped Carbon as Oxygen Reduction and pH-Universal Hydrogen Evolution Electrocatalysts

Qiao

Cui

Qian

et al. 2021

ACS Appl. Nano Mater.

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A critical issue in hydrogen evolution reaction (HER) and oxygen reduction reaction (ORR) is to improve the activity and durability of Pt-based catalysts. In this study, a catalyst was prepared with Pt 3 Fe nanoparticles anchored on the B,Ncodoped carbon (Pt 3 Fe/BNC) having significant HER activity in pH-universal electrolytes and significant ORR activity in acidic media. The as-prepared Pt 3 Fe/BNC catalyst exhibits notable HER catalytic activity with small overpotentials (η) at j = 10 mA cm −2 (η = 24 mV in 1.0 M KOH, 72 mV in 1.0 M phosphate-buffered saline (PBS), 38 mV in 0.5 M H 2 SO 4 , respectively) and significant ORR performance with a half-wave potential (E 1/2 ) of 0.835 V in acidic media. Metal−B bonds are demonstrated to form at the interface between Pt 3 Fe alloys and the B,N-codoped carbon layer, in addition to abundant immobilized Pt 3 Fe alloys that boost the activity of Pt 3 Fe/BNC. This research provides a new strategy for designing Pt-based nanostructures to improve the HER performance at all pH ranges and ORR performance in acidic media.

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“…Based upon data from synchrotron X-ray scattering, density-functional theory (DFT) and molecular dynamics simulations, and other techniques, it is generally accepted that ZIF formation involves a sequence of events starting from the formation of small (~1 nm) metastable prenucleation clusters, which evolve through aggregation followed by intraaggregate ZIF nucleation and growth. Recent studies on surface-directed MOF growth [38][39][40][41][42][43][44][45][46] indicate that the diffusion of MOF precursors in the vicinity of the 2D material, and the MOF-2D material interactions, are key to regulate the crystallinity of the MOF film and the ability to maintain in-plane/horizontal growth (desired for ultrathin films) versus out-of-plane/vertical (undesired) growth.…”

Section: Main Textmentioning

confidence: 99%

Nanometer-thick crystalline and amorphous zeolitic imidazolate framework films for membrane and patterning applications

Liu

Miao

Villalobos

et al. 2023

Preprint

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Zeolitic imidazolate frameworks (ZIFs) are a subset of metal-organic frameworks (MOFs) with more than 200 characterized crystalline and amorphous networks made of divalent transition metal centers (e.g., Zn2+ and Co2+) linked by imidazolate linkers. ZIF thin films have been pursued intensively motivated by the desire to prepare membranes for selective gas and liquid separations. To achieve membranes with high throughput, as in Å-scale biological channels with nanometer-scale pathlengths, ZIF films with the minimum possible thickness, down to just one unit cell, are highly desired. Control of ZIF film thickness at the 10-nm-scale may also enable emerging, MOF-inspired, applications including patterned crystalline MOF films, and amorphous organic-inorganic resists for high-resolution electron-beam (e-beam) and extreme UV (EUV) lithography. However, the state-of-the-art methods yield ZIF films with thicknesses exceeding 40 nanometers. Here, we report a deposition method from ultra-dilute precursor mixtures that within minutes yields uniform ZIF deposits with nm-scale thickness control. On crystalline substrate such as graphene, two-dimensional crystalline ZIF (2DZIF) film with thickness of a unit-cell could be achieved, which composed of a six-membered zincimidazolate coordination ring enabling record-high H2 permselective separation performance. Deposition under identical conditions on amorphous substrates yields macroscopically smooth amorphous ZIF (aZIF) films, which can be used as negative- and positive-tone resists yielding pattern features down to 20 nm. The method reported here will likely accelerate the development of 2D crystalline and ultrathin amorphous MOF films for applications ranging from separation membranes to sensors and patterning for microelectronic applications.

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Diffusion driven nanostructuring of metal–organic frameworks (MOFs) for graphene hydrogel based tunable heterostructures: highly active electrocatalysts for efficient water oxidation

Abstract: Exposing the surface states of metal-organic frameworks (MOFs) by tuning the shape and size of their nanostructures is expected to enhance their functionalities in practical applications. Herein, a highly scalable...

Cited by 23 publications

References 42 publications

Impact of Atomic Rearrangement and Single Atom Stabilization on MoSe₂@NiCo₂Se₄ Heterostructure Catalyst for Efficient Overall Water Splitting

Impact of Atomic Rearrangement and Single Atom Stabilization on MoSe₂@NiCo₂Se₄ Heterostructure Catalyst for Efficient Overall Water Splitting

Pt₃Fe Nanoparticles on B,N-Codoped Carbon as Oxygen Reduction and pH-Universal Hydrogen Evolution Electrocatalysts

Nanometer-thick crystalline and amorphous zeolitic imidazolate framework films for membrane and patterning applications

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Diffusion driven nanostructuring of metal–organic frameworks (MOFs) for graphene hydrogel based tunable heterostructures: highly active electrocatalysts for efficient water oxidation

Abstract: Exposing the surface states of metal-organic frameworks (MOFs) by tuning the shape and size of their nanostructures is expected to enhance their functionalities in practical applications. Herein, a highly scalable...

Cited by 23 publications

References 42 publications

Impact of Atomic Rearrangement and Single Atom Stabilization on MoSe2@NiCo2Se4 Heterostructure Catalyst for Efficient Overall Water Splitting

Impact of Atomic Rearrangement and Single Atom Stabilization on MoSe2@NiCo2Se4 Heterostructure Catalyst for Efficient Overall Water Splitting

Pt3Fe Nanoparticles on B,N-Codoped Carbon as Oxygen Reduction and pH-Universal Hydrogen Evolution Electrocatalysts

Nanometer-thick crystalline and amorphous zeolitic imidazolate framework films for membrane and patterning applications

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Impact of Atomic Rearrangement and Single Atom Stabilization on MoSe₂@NiCo₂Se₄ Heterostructure Catalyst for Efficient Overall Water Splitting

Impact of Atomic Rearrangement and Single Atom Stabilization on MoSe₂@NiCo₂Se₄ Heterostructure Catalyst for Efficient Overall Water Splitting

Pt₃Fe Nanoparticles on B,N-Codoped Carbon as Oxygen Reduction and pH-Universal Hydrogen Evolution Electrocatalysts