Yuichiro Himeda
YOU?
Author Swipe
View article: Quantitative nylon monomerization by the combination of chemical pretreatment and enzymatic hydrolysis using nylon hydrolases
Quantitative nylon monomerization by the combination of chemical pretreatment and enzymatic hydrolysis using nylon hydrolases Open
Nylons, derived from fossil fuels, are widely used for their toughness and flexibility, but they pose environmental concerns due to their low biodegradability. This study explored an efficient method for the monomerization of polymeric nyl…
View article: Toward Methanol Production by CO<sub>2</sub> Hydrogenation beyond Formic Acid Formation
Toward Methanol Production by CO<sub>2</sub> Hydrogenation beyond Formic Acid Formation Open
ConspectusThe Paradigm shift in considering CO2 as an alternative carbon feedstock as opposed to a waste product has recently prompted intense research activities. The implementation of CO2 utilization may be achieved by designing highly e…
View article: Ir(III) Complexes based on Quinoline Carboxamide Ligands for CO2 Hydrogenation and Formic Acid Dehydrogenation in Water
Ir(III) Complexes based on Quinoline Carboxamide Ligands for CO2 Hydrogenation and Formic Acid Dehydrogenation in Water Open
A series of new quinoline and isoquinoline carboxamide based Ir(III) complexes based on the concept of strong electron donating ability of the anionic N-atom have been developed for hydrogenation of CO2 and dehydrogenation of formic acid (…
View article: Electrochemical ammonia oxidation catalyzed by ruthenium complexes: investigation of substituent effect of axial pyridine ligands
Electrochemical ammonia oxidation catalyzed by ruthenium complexes: investigation of substituent effect of axial pyridine ligands Open
We have examined catalytic ammonia oxidation using ruthenium complexes bearing 2,2′-bipyridine-6,6′-dicarboxylate ligand and axial 3- and 4-substituted pyridine ligands under electrochemical conditions to study the substituent effect of th…
View article: Frontispiz: An Aqueous Redox Flow Battery Using CO<sub>2</sub> as an Active Material with a Homogeneous Ir Catalyst
Frontispiz: An Aqueous Redox Flow Battery Using CO<sub>2</sub> as an Active Material with a Homogeneous Ir Catalyst Open
Batteries. In their Research Article (e202310976), Ryoichi Kanega, Akira Yamamoto et al. report an aqueous redox flow battery using CO2 as an active material with a homogeneous Ir catalyst.
View article: Frontispiece: An Aqueous Redox Flow Battery Using CO<sub>2</sub> as an Active Material with a Homogeneous Ir Catalyst
Frontispiece: An Aqueous Redox Flow Battery Using CO<sub>2</sub> as an Active Material with a Homogeneous Ir Catalyst Open
Batteries. In their Research Article (e202310976), Ryoichi Kanega, Akira Yamamoto et al. report an aqueous redox flow battery using CO2 as an active material with a homogeneous Ir catalyst.
View article: Bimetallic catalysts for CO.sub.2 hydrogenation and H.sub.2 generation from formic acid and/or salts thereof
Bimetallic catalysts for CO.sub.2 hydrogenation and H.sub.2 generation from formic acid and/or salts thereof Open
The invention relates to a ligand that may be used to create a catalyst including a coordination complex is formed by the addition of two metals; Cp, Cp* or an unsubstituted or substituted .pi.-arene; and two coordinating solvent species o…
View article: Novel aqueous flow battery using CO2 redox with a bifunctional homogeneous Ir catalyst
Novel aqueous flow battery using CO2 redox with a bifunctional homogeneous Ir catalyst Open
To suppress CO2 emissions, technologies that incorporate CO2 capture, utilization, and storage are being actively developed. Particularly, batteries using CO2 redox reactions are one of the most promising systems that combine energy conver…
View article: High-pressure hydrogen generation from dehydrogenation of formic acid
High-pressure hydrogen generation from dehydrogenation of formic acid Open
High pressure hydrogen generation by dehydrogenation of formic acid.
View article: Covalently-Bonded Single-Site Ru-N2 Knitted into Covalent Triazine Frameworks for Boosting Photocatalytic CO2 Reduction
Covalently-Bonded Single-Site Ru-N2 Knitted into Covalent Triazine Frameworks for Boosting Photocatalytic CO2 Reduction Open
Developing highly efficient photocatalysts for converting CO2 into solar fuels is of great importance for energy sustainability. However, efficient photoreduction of CO2 over the heterogeneous catalyst is hindered by lack of precisely cont…
View article: Recent Progress in Homogeneous Catalytic Dehydrogenation of Formic Acid
Recent Progress in Homogeneous Catalytic Dehydrogenation of Formic Acid Open
Recently, there has been a strong demand for technologies that use hydrogen as an energy carrier, instead of fossil fuels. Hence, new and effective hydrogen storage technologies are attracting increasing attention. Formic acid (FA) is cons…
View article: Cover Feature: Manganese‐Catalyzed Ammonia Oxidation into Dinitrogen under Chemical or Electrochemical Conditions (ChemPlusChem 11/2021)
Cover Feature: Manganese‐Catalyzed Ammonia Oxidation into Dinitrogen under Chemical or Electrochemical Conditions (ChemPlusChem 11/2021) Open
The Cover Feature shows manganese-catalyzed ammonia oxidation, which is currently attracting attention because of its potential applications to direct ammonia fuel cells. Catalytic reactions involving a manganese salen complex occur under …
View article: Distinct Mechanisms and Hydricities of Cp*Ir-Based CO<sub>2</sub> Hydrogenation Catalysts in Basic Water
Distinct Mechanisms and Hydricities of Cp*Ir-Based CO<sub>2</sub> Hydrogenation Catalysts in Basic Water Open
Transition metal-catalyzed reversible hydrogenation of CO2 to formate in aqueous solutions under ambient conditions is an attractive environmentally friendly strategy for the storage and transportation of H2 in a liquid chemical form. Here…
View article: Electrochemical Reduction of Samarium Triiodide into Samarium Diiodide
Electrochemical Reduction of Samarium Triiodide into Samarium Diiodide Open
Electrochemical reduction of samarium triiodide (SmI3) into samarium diiodide (SmI2) is investigated as a model reaction to reuse samarium compounds in catalytic ammonia production under ambient reaction conditions. Potentiostatic electrol…
View article: Development of Proton-responsive Catalysts for Organic Synthesis and Energy Chemistry
Development of Proton-responsive Catalysts for Organic Synthesis and Energy Chemistry Open
This paper describes effects of a phenolic hydroxyl group of catalyst ligand desorbing proton depending on the pH in aqueous solution on catalytic properties, i.e., (i) electronic effect, (ii) pH-tuning of water-solubility, and (iii) penda…
View article: CO<sub>2</sub> Hydrogenation and Formic Acid Dehydrogenation Using Ir Catalysts with Amide-Based Ligands
CO<sub>2</sub> Hydrogenation and Formic Acid Dehydrogenation Using Ir Catalysts with Amide-Based Ligands Open
In this work, a series of Ir catalysts bearing amide-based ligands generated by a deprotonated amide moiety was prepared with the hypotheses that the strong electron-donating ability of the coordinated anionic nitrogen atom and the proton-…
View article: Hydrogen Storage Technology: Development of Effective Catalysts for Hydrogen Storage Technology Using Formic Acid (Adv. Energy Mater. 23/2019)
Hydrogen Storage Technology: Development of Effective Catalysts for Hydrogen Storage Technology Using Formic Acid (Adv. Energy Mater. 23/2019) Open
In article number 1801275, Hajime Kawanami, Qiang Xu, Yuichiro Himeda, and co-workers summarize their recent achievements in catalysts for hydrogen storage at AIST. Hydrogen storage using liquid formic acid is an important technique to ena…
View article: Front Cover: Ligand Effect on the Stability of Water‐Soluble Iridium Catalysts for High‐Pressure Hydrogen Gas Production by Dehydrogenation of Formic Acid (ChemPhysChem 10/2019)
Front Cover: Ligand Effect on the Stability of Water‐Soluble Iridium Catalysts for High‐Pressure Hydrogen Gas Production by Dehydrogenation of Formic Acid (ChemPhysChem 10/2019) Open
The Front Cover illustrates that the ligand effects of Cp*Ir catalyst for the dehydrogenation of formic acid and pyridyl-imidazoline ligand can improve both the activity and stability under the high-pressure conditions. More information ca…
View article: Cover Picture: Carbon Dioxide Hydrogenation and Formic Acid Dehydrogenation Catalyzed by Iridium Complexes Bearing Pyridyl‐pyrazole Ligands: Effect of an Electron‐donating Substituent on the Pyrazole Ring on the Catalytic Activity and Durability (Adv. Synth. Catal. 2/2019)
Cover Picture: Carbon Dioxide Hydrogenation and Formic Acid Dehydrogenation Catalyzed by Iridium Complexes Bearing Pyridyl‐pyrazole Ligands: Effect of an Electron‐donating Substituent on the Pyrazole Ring on the Catalytic Activity and Durability (Adv. Synth. Catal. 2/2019) Open
The inside cover picture, provided by Naoya Onishi and co-workers, illustrates CO2 hydrogenation and formic acid dehydrogenation accelerated by an efficient iridium catalyst bearing a pyridyl-pyrazole ligand in water. The novel catalyst ca…
View article: Cover Feature: Picolinamide‐Based Iridium Catalysts for Dehydrogenation of Formic Acid in Water: Effect of Amide N Substituent on Activity and Stability (Chem. Eur. J. 69/2018)
Cover Feature: Picolinamide‐Based Iridium Catalysts for Dehydrogenation of Formic Acid in Water: Effect of Amide N Substituent on Activity and Stability (Chem. Eur. J. 69/2018) Open
Hydrogen generation by dehydrogenation of formic acid using a water-soluble Ir catalyst bearing a new ligand is shown to proceed very quickly. The new ligand was based on a very simple amide structure and effectively donated electrons to I…
View article: Carbon Dioxide Hydrogenation and Formic Acid Dehydrogenation Catalyzed by Iridium Complexes Bearing Pyridyl‐pyrazole Ligands: Effect of an Electron‐donating Substituent on the Pyrazole Ring on the Catalytic Activity and Durability
Carbon Dioxide Hydrogenation and Formic Acid Dehydrogenation Catalyzed by Iridium Complexes Bearing Pyridyl‐pyrazole Ligands: Effect of an Electron‐donating Substituent on the Pyrazole Ring on the Catalytic Activity and Durability Open
Cp*Ir (Cp*=pentamethylcyclopentadienyl) complexes with an N , N ‐bidentate ligand such as 2,2′‐bipyridine serve as catalysts for both carbon dioxide (CO 2 ) hydrogenation to formate and formic acid dehydrogenation in water. Previously, it …
View article: Electroreduction of Carbon Dioxide to Formate by Homogeneous Ir Catalysts in Water
Electroreduction of Carbon Dioxide to Formate by Homogeneous Ir Catalysts in Water Open
Electroreduction of CO2 to formate is one of the approaches for converting electrical energy into chemical energy and is expected to be a method for storing unevenly distributed renewable sources. However, a high performance of the electro…
View article: Additive-Free Ruthenium-Catalyzed Hydrogen Production from Aqueous Formaldehyde with High Efficiency and Selectivity
Additive-Free Ruthenium-Catalyzed Hydrogen Production from Aqueous Formaldehyde with High Efficiency and Selectivity Open
In this study, an efficient water-soluble ruthenium complex was developed for selective hydrogen production from aqueous formaldehyde under mild conditions with a high yield (~95%). Hydrogen production by this catalytic system proceeds wit…
View article: Highly Efficient and Selective Methanol Production from Paraformaldehyde and Water at Room Temperature
Highly Efficient and Selective Methanol Production from Paraformaldehyde and Water at Room Temperature Open
In this paper, an efficient catalytic system using a water-soluble iridium complex, Cp*IrL(OH2)2+ (Cp* = pentamethylcyclopentadienyl, L = 2,2',6,6'-tetrahydroxy-4,4'-bipyrimidine), was developed for highly selective methanol production at …