A Ni-loaded, metal–organic framework–graphene composite as a precursor for in situ electrochemical deposition of a highly active and durable water oxidation nanocatalyst

2019 ◽  
Vol 55 (1) ◽  
pp. 31-34 ◽  
Author(s):  
Mohamed H. Hassan ◽  
Ahmed B. Soliman ◽  
Worood A. Elmehelmey ◽  
Arwa A. Abugable ◽  
Stavros G. Karakalos ◽  
...  
Keyword(s):  
Electrochemical Deposition ◽  
Water Oxidation ◽  
Metal Organic Framework ◽  
Oxidation Catalyst ◽  
Surface Restructuring ◽  
Graphene Composite ◽  
Highly Active ◽  
Metal Organic ◽  
Restructuring Process

UiO-66-NH2 was constructed on G sheets, metallated with Ni(ii) ions, and used as a precursor to deposit a highly active water oxidation catalyst in an electrochemical surface restructuring process.

scholarly journals Post Synthetic Defect Engineering of UiO-66 Metal-Organic Framework with Iridium(III)-HEDTA Complex and Application in Catalysis for Water Oxydation

2019 ◽  
Author(s):  
Ferdinando Costantino ◽  
Alceo Macchioni ◽  
Giordano Gatto ◽  
Roberto Bondi ◽  
Fabio Marmottini
Keyword(s):  
Water Oxidation ◽  
Metal Organic Framework ◽  
Partial Substitution ◽  
Iridium Complexes ◽  
Defect Engineering ◽  
Cerium Ammonium Nitrate ◽  
Highly Active ◽  
Metal Organic ◽  
Heterogenous Catalyst ◽  
Sacrificial Agent

Clean production of renewable fuels is a great challenge of our scientific community. Iridium complexes have demonstrated a superior catalytic activity in the water oxidation (WO) reaction, which is a crucial step in water splitting process. Herein we have used a defective zirconium MOF with UiO-66 structure as support of a highly active Ir complex based on EDTA with formula [Ir(HEDTA)Cl]Na. The defects are induced by the partial substitution of tereftalic acid with smaller formiate groups. Anchoring of the complex occurs through a post-synthetic exchange of formiate anions, coordinated at the zirconium clusters of the MOF, with the free carboxylate group of the [Ir(HEDTA)Cl]-complex. The modified material was tested as heterogenous catalyst for the WO reaction by using Cerium Ammonium Nitrate as sacrificial agent. Although TOF and TON values are comparable to those of other iridium heterogenized catalysts, the MOF exhibits iridium leaching not limited at the first catalytic run, as usually observed, suggesting a lack of stability of the hybrid system under strong oxidative conditions.

scholarly journals Post Synthetic Defect Engineering of UiO-66 Metal–Organic Framework with An Iridium(III)-HEDTA Complex and Application in Water Oxidation Catalysis

Inorganics ◽  
2019 ◽  
Vol 7 (10) ◽  
pp. 123 ◽  
Author(s):  
Giordano Gatto ◽  
Alceo Macchioni ◽  
Roberto Bondi ◽  
Fabio Marmottini ◽  
Ferdinando Costantino
Keyword(s):  
Water Oxidation ◽  
Metal Organic Framework ◽  
Oxidation Catalysis ◽  
Partial Substitution ◽  
Iridium Complexes ◽  
Cerium Ammonium Nitrate ◽  
Highly Active ◽  
Water Oxidation Catalysis ◽  
Metal Organic ◽  
Organic Framework

Clean production of renewable fuels is a great challenge of our scientific community. Iridium complexes have demonstrated a superior catalytic activity in the water oxidation (WO) reaction, which is a crucial step in water splitting process. Herein, we have used a defective zirconium metal–organic framework (MOF) with UiO-66 structure as support of a highly active Ir complex based on EDTA with the formula [Ir(HEDTA)Cl]Na. The defects are induced by the partial substitution of terephthalic acid with smaller formate groups. Anchoring of the complex occurs through a post-synthetic exchange of formate anions, coordinated at the zirconium clusters of the MOF, with the free carboxylate group of the [Ir(HEDTA)Cl]− complex. The modified material was tested as a heterogeneous catalyst for the WO reaction by using cerium ammonium nitrate (CAN) as the sacrificial agent. Although turnover frequency (TOF) and turnover number (TON) values are comparable to those of other iridium heterogenized catalysts, the MOF exhibits iridium leaching not limited at the first catalytic run, as usually observed, suggesting a lack of stability of the hybrid system under strong oxidative conditions.

Nanoscale cobalt metal–organic framework as a catalyst for visible light-driven and electrocatalytic water oxidation

2016 ◽  
Vol 40 (4) ◽  
pp. 3032-3035 ◽  
Author(s):  
Qian Xu ◽  
Hui Li ◽  
Fan Yue ◽  
Le Chi ◽  
Jide Wang
Keyword(s):  
Visible Light ◽  
Water Oxidation ◽  
Metal Organic Framework ◽  
Oxidation Catalyst ◽  
Cobalt Metal ◽  
Visible Light Driven ◽  
Metal Organic ◽  
Organic Framework

Co-ZIF-67 is proposed as an efficient water oxidation catalyst under visible light.

A high-valent di-μ-oxo dimanganese complex covalently anchored in a metal–organic framework as a highly efficient and recoverable water oxidation catalyst

2018 ◽  
Vol 54 (33) ◽  
pp. 4188-4191 ◽  
Author(s):  
Lina Zhang ◽  
Junying Chen ◽  
Ting Fan ◽  
Kui Shen ◽  
Miao Jiang ◽  
...  
Keyword(s):  
High Activity ◽  
Water Oxidation ◽  
Oxidation Reaction ◽  
Metal Organic Framework ◽  
Oxidation Catalyst ◽  
Homogeneous Catalyst ◽  
Highly Efficient ◽  
Metal Organic ◽  
High Valent ◽  
Organic Framework

A biomimetic homogeneous catalyst is successfully anchored inside MOFs, exhibiting high activity and reliable durability in the water oxidation reaction.

scholarly journals Metal-organic framework UiO-66 membranes

2019 ◽  
Vol 14 (2) ◽  
pp. 216-232 ◽  
Author(s):  
Xinlei Liu
Keyword(s):  
Gas Phase ◽  
Electrochemical Deposition ◽  
Synthesis Gas ◽  
Metal Organic Framework ◽  
Metal Organic Frameworks ◽  
Ion Separation ◽  
Metal Organic ◽  
Scalable Synthesis ◽  
Gas Phase Deposition

AbstractMetal-organic frameworks (MOFs) have emerged as a class of promising membrane materials. UiO-66 is a prototypical and stable MOF material with a number of analogues. In this article, we review five approaches for fabricating UiO-66 polycrystalline membranes including in situ synthesis, secondary synthesis, biphase synthesis, gas-phase deposition and electrochemical deposition, as well as their applications in gas separation, pervaporation, nanofiltration and ion separation. On this basis, we propose possible methods for scalable synthesis of UiO-66 membranes and their potential separation applications in the future.

Water Oxidation Catalyst cis-[Ru(bpy)(5,5′-dcbpy)(H2O)2]2+ and Its Stabilization in Metal–Organic Framework

ACS Catalysis ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 5299-5308 ◽  
Author(s):  
Roman Ezhov ◽  
Alireza Karbakhsh Ravari ◽  
Allison Page ◽  
Yulia Pushkar
Keyword(s):  
Water Oxidation ◽  
Metal Organic Framework ◽  
Oxidation Catalyst ◽  
Metal Organic ◽  
Organic Framework

scholarly journals Au@UiO-66: a base free oxidation catalyst

RSC Advances ◽  
2015 ◽  
Vol 5 (29) ◽  
pp. 22334-22342 ◽  
Author(s):  
K. Leus ◽  
P. Concepcion ◽  
M. Vandichel ◽  
M. Meledina ◽  
A. Grirrane ◽  
...  
Keyword(s):  
Au Nanoparticles ◽  
Metal Organic Framework ◽  
Oxidation Catalyst ◽  
Metal Organic ◽  
Free Oxidation ◽  
Organic Framework

We present the in situ synthesis of Au nanoparticles within the Zr based Metal Organic Framework, UiO-66.

A novel two-dimensional nickel phthalocyanine-based metal–organic framework for highly efficient water oxidation catalysis

2018 ◽  
Vol 6 (3) ◽  
pp. 1188-1195 ◽  
Author(s):  
Hongxing Jia ◽  
Yuchuan Yao ◽  
Jiangtao Zhao ◽  
Yuyue Gao ◽  
Zhenlin Luo ◽  
...  
Keyword(s):  
Water Oxidation ◽  
Metal Organic Framework ◽  
Oxidation Catalysis ◽  
Conductive Materials ◽  
Nickel Phthalocyanine ◽  
Energy Applications ◽  
Highly Active ◽  
Water Oxidation Catalysis ◽  
Metal Organic ◽  
First Time

For the first time, we report herein bottom-up fabrication of a conductive nickel phthalocyanine-based 2D MOF and use it as a highly active electrocatalyst for OER (overpotential < 250 mV) without further pyrolysis or adding conductive materials, which can facilitate the development of 2D MOFs for energy applications.

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