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 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.

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.

High catalytic activity for water oxidation based on nanostructured nickel phosphide precursors

2015 ◽  
Vol 51 (58) ◽  
pp. 11626-11629 ◽  
Author(s):  
Ali Han ◽  
Huanlin Chen ◽  
Zijun Sun ◽  
Jun Xu ◽  
Pingwu Du
Keyword(s):  
Catalytic Activity ◽  
Noble Metal ◽  
Water Oxidation ◽  
Oxidation Catalysis ◽  
High Catalytic Activity ◽  
Nickel Phosphide ◽  
Catalyst Precursor ◽  
Metal Free ◽  
Water Oxidation Catalysis ◽  
First Time

For the first time, noble-metal-free nickel phosphide (Ni2P) was used as an excellent catalyst precursor for water oxidation catalysis.

scholarly journals Separating bulk and surface processes in NiOx electrocatalysts for water oxidation

2020 ◽  
Vol 4 (10) ◽  
pp. 5024-5030
Author(s):  
Sacha Corby ◽  
Miguel-García Tecedor ◽  
Sven Tengeler ◽  
Céline Steinert ◽  
Benjamin Moss ◽  
...  
Keyword(s):  
Water Oxidation ◽  
Oxidation Catalysis ◽  
Thickness Dependence ◽  
Surface Processes ◽  
Highly Active ◽  
Water Oxidation Catalysis ◽  
Nickel Oxyhydroxide

Nickel oxyhydroxide electrocatalysts are highly active for water oxidation and swell when electrochemically activated. In this thickness dependence study, we find only the upper surface (<5 nm) is active during water oxidation catalysis.

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 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

Solvent-Free Powder Synthesis and MOF-CVD Thin Films of the Mesoporous Metal-Organic Framework MAF-6

2019 ◽  
Author(s):  
Timothée Stassin ◽  
Ivo Stassen ◽  
Joao Marreiros ◽  
Alexander John Cruz ◽  
Rhea Verbeke ◽  
...  
Keyword(s):  
Vapor Phase ◽  
Metal Organic Framework ◽  
Chemical Vapor ◽  
Uptake Capacity ◽  
Powder Synthesis ◽  
Crystalline Films ◽  
Metal Organic ◽  
Mesoporous Metal ◽  
First Time ◽  
Organic Framework

A simple solvent- and catalyst-free method is presented for the synthesis of the mesoporous metal-organic framework (MOF) MAF-6 (RHO-Zn(eIm)2) based on the reaction of ZnO with 2-ethylimidazole vapor at temperatures ≤ 100 °C. By translating this method to a chemical vapor deposition (CVD) protocol, mesoporous crystalline films could be deposited for the first time entirely from the vapor phase. A combination of PALS and Kr physisorption measurements confirmed the porosity of these MOF-CVD films and the size of the MAF-6 supercages (diam. ~2 nm), in close agreement with powder data and calculations. MAF-6 powders and films were further characterized by XRD, TGA, SEM, FTIR, PDF and EXAFS. The exceptional uptake capacity of the mesoporous MAF-6 in comparison to the microporous ZIF-8 is demonstrated by vapor-phase loading of a molecule larger than the ZIF-8 windows.

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