Effect of Organic Linkers on Metal-Organic Frameworks Electrode Fabrication for Battery Supercapacitor Hybrid Application

Metal organic framework (MOFs) of ternary metal precursors with different organic linkers are synthesized and fabricated on Ni-foam as the electrodes via hydrothermal reaction aiming to enhance the electrical conductivity and the specific capacitance, Cs. We report the preparation of ternary metal with different organic linkers named CoCuNi-bi using terephthalic acid (H2bdc), CoCuNi-tri using trimellitic acid and CoCuNi-tetra using pyromellitic acid with increasing of active sites on Ni-foam substrate respectively. The CoCuNi-tetra demonstrates the highest Cs of 740 F g-1 at 2 mV/s & 791 F g-1 (87.9 mAh g-1) at 1 Ag-1 respectively followed by CoCuNi-tri (674 F g-1 at 1 A g-1; 74.9 mAh g-1) and CoCuNi-bi (591 F g-1 at 1 A g-1; 65.7 mAh g-1). CoCuNi-tetra shows the best electrochemical performance hence it could be the encouraging electrode for supercapacitor materials.

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Metal-organic-framework derived hollow manganese nickel selenide spheres confined with nanosheets on nickel foam for hybrid supercapacitors

Dalton Transactions ◽

10.1039/d1dt01215k ◽

2021 ◽

Author(s):

Bahareh ameri ◽

Akbar Mohammadi Zardkhoshoui ◽

Saied Saeed Hosseiny Davarani

Keyword(s):

Active Sites ◽

Nickel Foam ◽

Metal Organic Framework ◽

High Surface ◽

Metal Organic Frameworks ◽

High Surface Area ◽

Supercapacitive Performance ◽

Hybrid Supercapacitors ◽

Porous Networks ◽

Metal Organic

Metal-organic frameworks (MOFs) derived nanoarchitectures have special features, such as high surface area (SA), abundant active sites, exclusive porous networks, and remarkable supercapacitive performance when compared to traditional nanoarchitectures. Herein,...

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A small molecular, a big scissoring effect: sodium dodecyl sulfate working on two-dimensional metal organic frameworks

CrystEngComm ◽

10.1039/d0ce01751e ◽

2021 ◽

Author(s):

Qing Luo ◽

Zhen Ding ◽

Huamin Sun ◽

Zhen Cheng ◽

Naien SHI ◽

...

Keyword(s):

Sodium Dodecyl Sulfate ◽

Active Sites ◽

Metal Organic Framework ◽

Metal Organic Frameworks ◽

Sodium Dodecyl ◽

Advanced Materials ◽

Controlled Synthesis ◽

Two Dimensional ◽

Dodecyl Sulfate ◽

Metal Organic

Ultrathin two-dimensional (2D) metal-organic framework (MOF) nanosheets are prosperous advanced materials due to their particularly thin thickness and exposed active sites. The difficulty in the controlled synthesis of 2D MOF...

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Rational synthesis of isomorphic rare earth metal-organic framework materials for simultaneous adsorption and photocatalytic degradation of organic dyes in water

CrystEngComm ◽

10.1039/d1ce01411k ◽

2021 ◽

Author(s):

Meng-Ting Hang ◽

Yi Cheng ◽

Yi-Tong Wang ◽

Huan Li ◽

Meng-Qi Zheng ◽

...

Keyword(s):

Active Sites ◽

Organic Dyes ◽

Metal Organic Framework ◽

Metal Organic Frameworks ◽

Earth Metal ◽

Dye Wastewater ◽

Porous Structures ◽

Framework Materials ◽

Metal Organic ◽

Ordered Porous

In recent years, the treatment of dye wastewater has attracted widespread attention. Metal-organic frameworks (MOFs) adopt ordered porous structures and abundant active sites, which endorses them promising photocatalysts for the...

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Ir-Doped Ni-based metal–organic framework ultrathin nanosheets on Ni foam for enhanced urea electro-oxidation

Chemical Communications ◽

10.1039/c9cc09484a ◽

2020 ◽

Vol 56 (14) ◽

pp. 2151-2154 ◽

Cited By ~ 9

Author(s):

You Xu ◽

Xingjie Chai ◽

Tianlun Ren ◽

Shanshan Yu ◽

Hongjie Yu ◽

...

Keyword(s):

Solvothermal Method ◽

Nickel Foam ◽

Metal Organic Framework ◽

Metal Organic Frameworks ◽

Ni Foam ◽

Ultrathin Nanosheets ◽

Metal Organic ◽

Electro Oxidation ◽

Organic Framework

NiIr-based metal–organic frameworks grown on a nickel foam substrate (NiIr-MOF/NF) are synthesized by a solvothermal method and directly used for urea electro-oxidation.

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Multifunctional metal–organic framework catalysts: synergistic catalysis and tandem reactions

Chemical Society Reviews ◽

10.1039/c6cs00250a ◽

2017 ◽

Vol 46 (1) ◽

pp. 126-157 ◽

Cited By ~ 916

Author(s):

Yuan-Biao Huang ◽

Jun Liang ◽

Xu-Sheng Wang ◽

Rong Cao

Keyword(s):

Active Sites ◽

Metal Organic Framework ◽

Metal Organic Frameworks ◽

Tandem Reactions ◽

Synergistic Catalysis ◽

Metal Organic ◽

Organic Framework

Various active sites incorporated into metal–organic frameworks (MOFs) are suitable for synergistic catalysis and tandem reactions.

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Carbon Support Tuned Electrocatalytic Activity of Single-Site Metal-organic Framework toward Oxygen Reduction Reaction

Chemical Science ◽

10.1039/d1sc00997d ◽

2021 ◽

Author(s):

Wenjie Ma ◽

Fei Wu ◽

Ping Yu ◽

Lanqun Mao

Keyword(s):

Electrocatalytic Activity ◽

Active Sites ◽

Metal Organic Framework ◽

Metal Organic Frameworks ◽

Structural Diversity ◽

Carbon Support ◽

Reduction Reaction ◽

Single Site ◽

Metal Organic ◽

Single Site Catalysts

Metal-organic frameworks (MOFs) possess fantastic features such as structural diversity, tunable accessible pores and atomically dispersed active sites, holding tremendous potentials as high versatile platforms for fabricating single-site catalysts. The...

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Magnetic Ordering via Itinerant Ferromagnetism in a Metal-Organic Framework

10.26434/chemrxiv.12330866 ◽

2020 ◽

Author(s):

Jesse Park ◽

Brianna Collins ◽

Lucy Darago ◽

Tomce Runcevski ◽

Michael Aubrey ◽

...

Keyword(s):

Charge Transport ◽

Magnetic Order ◽

Metal Organic Framework ◽

Metal Organic Frameworks ◽

Magnetic Ordering ◽

Double Exchange ◽

Itinerant Ferromagnetism ◽

Organic Solids ◽

Metal Organic ◽

Organic Framework

Materials that combine magnetic order with other desirable physical attributes offer to revolutionize our energy landscape. Indeed, such materials could find transformative applications in spintronics, quantum sensing, low-density magnets, and gas separations. As a result, efforts to design multifunctional magnetic materials have recently moved beyond traditional solid-state materials to metal–organic solids. Among these, metal–organic frameworks in particular bear structures that offer intrinsic porosity, vast chemical and structural programmability, and tunability of electronic properties. Nevertheless, magnetic order within metal–organic frameworks has generally been limited to low temperatures, owing largely to challenges in creating strong magnetic exchange in extended metal–organic solids. Here, we employ the phenomenon of itinerant ferromagnetism to realize magnetic ordering at TC = 225 K in a mixed-valence chromium(II/III) triazolate compound, representing the highest ferromagnetic ordering temperature yet observed in a metal–organic framework. The itinerant ferromagnetism is shown to proceed via a double-exchange mechanism, the first such observation in any metal–organic material. Critically, this mechanism results in variable-temperature conductivity with barrierless charge transport below TC and a large negative magnetoresistance of 23% at 5 K. These observations suggest applications for double-exchange-based coordination solids in the emergent fields of magnetoelectrics and spintronics. Taken together, the insights gleaned from these results are expected to provide a blueprint for the design and synthesis of porous materials with synergistic high-temperature magnetic and charge transport properties.

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Engineering Porosity Through Defects in a Giant Pore Metal–Organic Framework

10.26434/chemrxiv.12847574.v1 ◽

2020 ◽

Author(s):

Adam Sapnik ◽

Duncan Johnstone ◽

Sean M. Collins ◽

Giorgio Divitini ◽

Alice Bumstead ◽

...

Keyword(s):

Distribution Function ◽

Ball Milling ◽

Local Structure ◽

Pair Distribution Function ◽

Function Analysis ◽

Metal Organic Framework ◽

Metal Organic Frameworks ◽

Defect Engineering ◽

Metal Organic ◽

Unsaturated Metal Sites

Defect engineering is a powerful tool that can be used to tailor the properties of metal–organic frameworks (MOFs). Here, we incorporate defects through ball milling to systematically vary the porosity of the giant pore MOF, MIL-100 (Fe). We show that milling leads to the breaking of metal–linker bonds, generating more coordinatively unsaturated metal sites, and ultimately causes amorphisation. Pair distribution function analysis shows the hierarchical local structure is partiallyretained, even in the amorphised material. We find that the solvent toluene stabilises the MIL-100 (Fe) framework against collapse and leads to a substantial rentention of porosity over the non-stabilised material.

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Metal-Organic Frameworks vs. Buffers: Case Study of UiO-66 Stability

10.26434/chemrxiv.12588269.v1 ◽

2020 ◽

Author(s):

Daniel Bůžek ◽

Slavomír Adamec ◽

Kamil Lang ◽

Jan Demel

Keyword(s):

Inductively Coupled Plasma ◽

Buffer Capacity ◽

Metal Organic Framework ◽

Metal Organic Frameworks ◽

Analytical Techniques ◽

Aqueous Dispersions ◽

Inductively Coupled ◽

Plasma Mass Spectrometry ◽

Metal Organic

<div>UiO-66 is a zirconium-based metal-organic framework (MOF) that has numerous applications. Our group recently determined that UiO-66 is not as inert in aqueous dispersions as previously reported in the literature. The present work therefore assessed the behaviour of UiO-66 in buffers: 2-amino-2-(hydroxymethyl)-1,3-propanediol (TRIS), 4-(2-hydroxyethyl)piperazine-1-ethane sulfonic acid (HEPES), N-ethylmorpholine (NEM) and phosphate buffer (PB), all of which are commonly used in many UiO-66 applications. High pressure liquid chromatography and inductively coupled plasma mass spectrometry were used to monitor degradation of the MOF. In each buffer, the terephthalate linker was released to some extent, with a more pronounced leaching effect in the saline forms of these buffers. The HEPES buffer was found to be the most benign, whereas NEM and PB should be avoided at any concentration as they were shown to rapidly degrade the UiO-66 framework. Low concentration TRIS buffers are also recommended, although these offer minimal buffer capacity to adjust pH. Regardless of the buffer used, rapid terephthalate release was observed, indicating that the UiO-66 was attacked immediately after mixing with the buffer. In addition, the dissolution of zirconium, observed in some cases, intensified the UiO-66 decomposition process. These results demonstrate that sensitive analytical techniques have to be used to monitor the release of MOF components so as to quantify the stabilities of these materials in liquid environments.</div>

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An Overview of Metal-organic Frameworks-based Acid/Base Catalysts for Biofuel Synthesis

Current Organic Chemistry ◽

10.2174/1385272824999200726230556 ◽

2020 ◽

Vol 24 (16) ◽

pp. 1876-1891

Author(s):

Qiuyun Zhang ◽

Yutao Zhang ◽

Jingsong Cheng ◽

Hu Li ◽

Peihua Ma

Keyword(s):

Alternative Fuels ◽

Heterogeneous Catalysts ◽

Supported Catalysts ◽

Metal Organic Framework ◽

Metal Organic Frameworks ◽

Flexible Structures ◽

Biodiesel Production ◽

Biodiesel Synthesis ◽

Metal Organic ◽

Organic Framework

Biofuel synthesis is of great significance for producing alternative fuels. Among the developed catalytic materials, the metal-organic framework-based hybrids used as acidic, basic, or supported catalysts play major roles in the biodiesel production. This paper presents a timely and comprehensive review of recent developments on the design and preparation of metal-organic frameworks-based catalysts used for biodiesel synthesis from various oil feedstocks, including MILs-based catalysts, ZIFs-based catalysts, UiO-based catalysts, Cu-BTC-based catalysts, and MOFs-derived porous catalysts. Due to their unique and flexible structures, excellent thermal and hydrothermal stability, and tunable host-guest interactions, as compared with other heterogeneous catalysts, metal-organic framework-based catalysts have good opportunities for application in the production of biodiesel at industrial scale.

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