Fabrication of Magnetic Superstructure NiFe<sub>2</sub>O<sub>4</sub>@MOF-74 and Its Derivative for Electrocatalytic Hydrogen Evolution with AC Magnetic Field

Zheng, Hang-bo; Chen, Huihui; Wang, Yuan-Li; Pengzhao, Gao; Liu, Xiaopan; Rebrov, Evgeny V.

doi:10.1021/acsami.0c11816

Cited by 48 publications

(39 citation statements)

References 60 publications

(133 reference statements)

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“…Moreover, the deconvoluted C 1s and O 1s XPS signals confirm the presence of C–Co (288.6 eV) and O–Co (539.7 eV) and act as evidence for direct charge-transfer interaction between NCF and Co 3 O 4 . Such charge-transfer-based interactions and subsequent emergence of ferromagnetic behavior in the catalyst–support interface , can be crucial for the observed magnetoelectrocatalysis.…”

Section: Resultsmentioning

confidence: 99%

“…In this context, non-Pt group transition metal oxide nanoparticles − offer great potential by the virtue of dimensionally induced ferromagnetism, emerging from systematic oxide vacancies and disordered sublattices. , These ferromagnetic oxide electrodes, when subjected to magnetic field, can influence the electron transfer kinetics associated with the catalytic pathway. While this strategy is effective in controlling the fate of a spin-restricted reaction such as oxygen evolution reaction, utilizing similar principles to influence the kinetics of spin-allowed process such as HER is nontrivial, and therefore demands new strategies .…”

Section: Introductionmentioning

confidence: 99%

“…While this strategy is effective in controlling the fate of a spin-restricted reaction such as oxygen evolution reaction, utilizing similar principles to influence the kinetics of spin-allowed process such as HER is nontrivial, and therefore demands new strategies . The instant demagnetization of such spin-polarized surfaces results in bipolar ON–OFF behavior in magnetochronoamperometry and thereby hinders their application for room-temperature electrocatalysis. , The instant demagnetization is attributed to the short-lived spin states and their fast relaxation at room temperature through spin–spin and spin–lattice interactions . Interestingly, Li et al achieved prolonged relaxation lifetimes of magnetized, nonzero spin states at the metal oxide–carbon interface .…”

Section: Introductionmentioning

confidence: 99%

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Premagnetized Carbon-Catalyst Interface Delivering 650% Enhancement in Electrocatalytic Kinetics of Hydrogen Evolution Reaction

Saha

Ball

Subramaniam

2021

ACS Sustainable Chem. Eng.

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Manipulating heterogeneous electrified interfaces with an external magnetic field (H ext) explicitly mandates the constant presence of H ext for achieving magnetoelectrocatalytic kinetic enhancements. Here, we demonstrate the highest kinetic enhancement of 650% in electrocatalytic hydrogen evolution reaction (HER), without the mandatory presence of H ext. A synergistic interface created in nanostructured hard carbon florets (NCF) decorated with ferro–paramagnetic nanoparticles (Co3O4, Co, and Ni–Co) is demonstrated to be critical for both (a) prominent enhancement in HER-kinetics when H ext = 200 mT and (b) sustaining the rapid HER when H ext = 0 mT. Significant lowering of magnetoresistance (22%) and magnetocharge-transfer resistance (84.8%) using a weak H ext = 100 mT leads to a 2.5-fold volumetric increment in hydrogen generation driven by 7% enhancement in electrokinetic activity. Furthermore, all such enhancements are strongly correlated with the magnetic coercivity of the catalyst, implying the role of interfacial mechanistic modulation of the HER by H ext. Additionally, microscopic dimensional enlargement of the structurally flexible NCF promotes such a long-term effect leading to larger magnetocurrent as compared to other carbon-based supports. Our work demonstrates the importance of spin polarization in magnetically active electrocatalytic interfaces and thereby offers a general practical strategy for energy-efficient hydrogen production.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Premagnetized Carbon-Catalyst Interface Delivering 650% Enhancement in Electrocatalytic Kinetics of Hydrogen Evolution Reaction

Saha

Ball

Subramaniam

2021

ACS Sustainable Chem. Eng.

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“…The design of ligands is also useful for the fabrication of photo‐responsive MOFs incorporating particular photosensitive molecules as ligands. [ 119,120 ]…”

Section: Single Stimulus Mofsmentioning

confidence: 99%

Advances in Functional Metal‐Organic Frameworks Based On‐Demand Drug Delivery Systems for Tumor Therapeutics

Yalamandala

Shen

Min

et al. 2021

Advanced NanoBiomed Research

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Dual on‐demand delivery of therapeutic cargos and energy by transporters can latently mitigate side effects and provide the unique aspects required for precision medicine. To achieve this goal, metal‐organic frameworks (MOFs), hybrid materials constructed from metal ions and polydentate organic linkers, have attracted attention for controlled drug release and energy delivery in tumors. With appropriate characteristics such as tunable pore size, high surface area, and tailorable composition, therapeutic agents (drug molecules or responsive agents) can be effectively encapsulated in MOFs. Based on their intrinsic properties, many physically or chemically responsive agents are able to achieve precise on‐demand drug release and energy generation (thermal or dynamic therapy) using MOFs (as energy absorbers). Herein, the results obtained with various stimuli‐responsive MOFs (including materials from the Institute Lavoisier [MIL], zeolitic imidazolate frameworks [ZIFs], MOFs from the University of Oslo [UiO], and other MOFs) used for tumor suppression are summarized. Furthermore, with the appropriate stimulus, catalytic therapy (caused by the Fenton reaction induced by MOFs) can be provided via the utilization of existing high levels of H2O2 in cancer cells, which potentially elicits immune responses. In addition, the issues impeding clinical translation are also discussed, including the need to overcome tumor heterogeneity and to recognize the innate immune system and possible effects. As the references reveal, additional comprehensive strategies and studies are needed to enable broad applications and potent translational developments.

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“…Remarkably, the structural diversity of MOFs makes them very suitable for electrocatalytic fields, especially for oxygen evolution reaction (OER) . Among various MOFs electrocatalysts, MOF-74 is one of the famous MOFs linked by 2,5-dihydroxyterephthalic acid and metal ion ( e.g ., Co 2+ , Ni 2+ , and Fe 2+ ), which has been extensively investigated for OER because of high stability in alkaline electrolyte . Furthermore, the metal node in monometallic MOF-74 can be facilely replaced by second metal ion to construct bimetallic synergy effect for improving OER activity …”

Section: Introductionmentioning

confidence: 99%

Synthesis, Characterization, and Electrocatalytic Activity Exploration of MOF-74: A Research-Style Laboratory Experiment

et al. 2021

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A research-style laboratory experiment composed of the synthesis of MOF-74 materials, related structural characterization, and the cutting-edge application of electrocatalytic oxygen evolution reaction (OER) has been designed toward advanced undergraduates at East China University of Technology (ECUT). The desired monometallic MOF-74 (Ni-MOF-74 and Co-MOF-74) and bimetallic NiCo-MOF-74 were synthesized by students using cheap raw materials under mild reaction conditions. Students operated the modern instruments to perform powder X-ray diffraction (PXRD), Fourier transform infrared (FT-IR) spectroscopy, and thermogravimetric analysis (TGA) applied extensively in chemical research to explore whether the materials were successfully synthesized and the thermal stability under the guidance of the instructor. The electrocatalytic OER activity of bimetallic NiCo-MOF-74 was compared with monometallic Ni-MOF-74 and Co-MOF-74 to explore and understand the bimetallic synergy effect in MOFs materials. This experiment not only enabled students to master the solvothermal method for MOFs synthesis but also provided students the chance to operate several common chemical instruments and master their functions, realizing the application of theoretical knowledge to practice. Most importantly, this experiment helped students realize the importance of MOFs in the electrochemical energy fields and established a sense of teamwork by analyzing and discussing the bimetallic synergy effect in NiCo-MOF-74 for OER catalysis.

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Fabrication of Magnetic Superstructure NiFe₂O₄@MOF-74 and Its Derivative for Electrocatalytic Hydrogen Evolution with AC Magnetic Field

Abstract: Please refer to published version for the most recent bibliographic citation information. If a published version is known of, the repository item page linked to above, will contain details on accessing it.

Cited by 48 publications

References 60 publications

Premagnetized Carbon-Catalyst Interface Delivering 650% Enhancement in Electrocatalytic Kinetics of Hydrogen Evolution Reaction

Premagnetized Carbon-Catalyst Interface Delivering 650% Enhancement in Electrocatalytic Kinetics of Hydrogen Evolution Reaction

Advances in Functional Metal‐Organic Frameworks Based On‐Demand Drug Delivery Systems for Tumor Therapeutics

Synthesis, Characterization, and Electrocatalytic Activity Exploration of MOF-74: A Research-Style Laboratory Experiment

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Fabrication of Magnetic Superstructure NiFe2O4@MOF-74 and Its Derivative for Electrocatalytic Hydrogen Evolution with AC Magnetic Field

Abstract: Please refer to published version for the most recent bibliographic citation information. If a published version is known of, the repository item page linked to above, will contain details on accessing it.

Cited by 48 publications

References 60 publications

Premagnetized Carbon-Catalyst Interface Delivering 650% Enhancement in Electrocatalytic Kinetics of Hydrogen Evolution Reaction

Premagnetized Carbon-Catalyst Interface Delivering 650% Enhancement in Electrocatalytic Kinetics of Hydrogen Evolution Reaction

Advances in Functional Metal‐Organic Frameworks Based On‐Demand Drug Delivery Systems for Tumor Therapeutics

Synthesis, Characterization, and Electrocatalytic Activity Exploration of MOF-74: A Research-Style Laboratory Experiment

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Fabrication of Magnetic Superstructure NiFe₂O₄@MOF-74 and Its Derivative for Electrocatalytic Hydrogen Evolution with AC Magnetic Field