scholarly journals Hybrid 2D Dual-Metal-Organic Frameworks for Enhanced Water Oxidation Catalysis

2018 ◽  
Vol 28 (26) ◽  
pp. 1801554 ◽  
Author(s):  
Kun Rui ◽  
Guoqiang Zhao ◽  
Yaping Chen ◽  
Yue Lin ◽  
Qian Zhou ◽  
...  
Keyword(s):  
Water Oxidation ◽  
Metal Organic Frameworks ◽  
Oxidation Catalysis ◽  
Water Oxidation Catalysis ◽  
Metal Organic ◽  
Dual Metal

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.

scholarly journals An exceptionally stable octacobalt-cluster-based metal–organic framework for enhanced water oxidation catalysis

2019 ◽  
Vol 10 (42) ◽  
pp. 9859-9864 ◽  
Author(s):  
Ning-Yu Huang ◽  
Jian-Qiang Shen ◽  
Zi-Ming Ye ◽  
Wei-Xiong Zhang ◽  
Pei-Qin Liao ◽  
...  
Keyword(s):  
Reaction Kinetics ◽  
Adsorption Energy ◽  
Water Oxidation ◽  
Metal Organic Framework ◽  
Oxidation Catalysis ◽  
Cobalt Ions ◽  
Water Oxidation Catalysis ◽  
Metal Organic ◽  
Kinetics Of ◽  
Organic Framework

The site, capping four coplanar cobalt ions, has a near-optimal OH− adsorption energy, which is beneficial to accelerate the reaction kinetics of water oxidation catalysis.

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.

scholarly journals Metal-Organic Frameworks in Oxidation Catalysis with Hydrogen Peroxide

Catalysts ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 283
Author(s):  
Oxana Kholdeeva ◽  
Nataliya Maksimchuk
Keyword(s):  
Hydrogen Peroxide ◽  
Liquid Phase ◽  
Selective Oxidation ◽  
Metal Organic Frameworks ◽  
Short Review ◽  
Catalytic Performance ◽  
Oxidation Catalysis ◽  
Catalyst Stability ◽  
Aqueous Hydrogen Peroxide ◽  
Metal Organic

In recent years, metal–organic frameworks (MOFs) have received increasing attention as selective oxidation catalysts and supports for their construction. In this short review paper, we survey recent findings concerning use of MOFs in heterogeneous liquid-phase selective oxidation catalysis with the green oxidant–aqueous hydrogen peroxide. MOFs having outstanding thermal and chemical stability, such as Cr(III)-based MIL-101, Ti(IV)-based MIL-125, Zr(IV)-based UiO-66(67), Zn(II)-based ZIF-8, and some others, will be in the main focus of this work. The effects of the metal nature and MOF structure on catalytic activity and oxidation selectivity are analyzed and the mechanisms of hydrogen peroxide activation are discussed. In some cases, we also make an attempt to analyze relationships between liquid-phase adsorption properties of MOFs and peculiarities of their catalytic performance. Attempts of using MOFs as supports for construction of single-site catalysts through their modification with heterometals will be also addressed in relation to the use of such catalysts for activation of H2O2. Special attention is given to the critical issues of catalyst stability and reusability. The scope and limitations of MOF catalysts in H2O2-based selective oxidation are discussed.

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