The post-functionalization of Co(iii)PPh3 triarylcorroles through Suzuki–Miyaura couplings and their tunable electrochemically-catalyzed hydrogen evolution and oxygen reduction

2020 ◽  
Vol 49 (10) ◽  
pp. 3326-3332
Author(s):  
Xu Liang ◽  
Yuanyuan Qiu ◽  
Xifeng Zhang ◽  
Weihua Zhu
Keyword(s):  
Oxygen Reduction ◽  
Hydrogen Evolution ◽  
Structural Characterization ◽  
Coupling Reactions ◽  
Post Functionalization

The post-functionalization of six novel symmetric and asymmetric meso-expanded Co(iii) corroles through Suzuki–Miyaura coupling reactions has been successfully accomplished and is reported along with their structural characterization.

meso-Expanded Co(III)corroles through Suzuki-Miyaura couplings: Synthesis and tunable electrocatalytic hydrogen evolutions and oxygen reductions

2021 ◽  
pp. A-I
Author(s):  
Xifeng Zhang ◽  
Wenwu Guo ◽  
Weihua Zhu ◽  
Xu Liang
Keyword(s):  
Electronic Structure ◽  
Hydrogen Evolution ◽  
Structural Characterization ◽  
Coupling Reactions ◽  
Structure Property ◽  
Electrochemical Catalysis ◽  
Oxygen Reduction Reactions ◽  
Structure Property Relationships ◽  
Hydrogen Evolution Reactions ◽  
Positional Isomerism

In this study, four meso-expanded Co(III)corroles at meta-positions through Suzuki–Miyaura coupling reactions and their structural characterization are successfully accomplished and reported. An analysis of the structure–property relationships by spectroscopy, electrochemistry and electrochemical catalysis demonstrate how the positional isomerism influence the electronic structure and their catalytic behaviors of hydrogen evolution reactions (HERs) and oxygen reduction reactions (ORRs).

Rational prediction of multifunctional bilayer single atom catalysts for the hydrogen evolution, oxygen evolution and oxygen reduction reactions

Nanoscale ◽  
2020 ◽  
Vol 12 (39) ◽  
pp. 20413-20424
Author(s):  
Riming Hu ◽  
Yongcheng Li ◽  
Fuhe Wang ◽  
Jiaxiang Shang
Keyword(s):  
Oxygen Reduction ◽  
Hydrogen Evolution ◽  
Oxygen Evolution ◽  
Single Atom ◽  
Reduction Reactions ◽  
Oxygen Reduction Reactions

Bilayer single atom catalysts can serve as promising multifunctional electrocatalysts for the HER, ORR, and OER.

scholarly journals Convenient Access to Functionalized Non-Symmetrical Atropisomeric 4,4′-Bipyridines

Compounds ◽  
2021 ◽  
Vol 1 (2) ◽  
pp. 58-74
Author(s):  
Emmanuel Aubert ◽  
Emmanuel Wenger ◽  
Paola Peluso ◽  
Victor Mamane
Keyword(s):  
Solid State ◽  
Intermolecular Interactions ◽  
Medicinal Chemistry ◽  
Crystal Packing ◽  
Cross Coupling ◽  
Coupling Reactions ◽  
Halogen Bonds ◽  
Cross Coupling Reactions ◽  
Cyano Groups ◽  
Post Functionalization

Non-symmetrical chiral 4,4′-bipyridines have recently found interest in organocatalysis and medicinal chemistry. In this regard, the development of efficient methods for their synthesis is highly desirable. Herein, a series of non-symmetrical atropisomeric polyhalogenated 4,4′-bipyridines were prepared and further functionalized by using cross-coupling reactions. The desymmetrization step is based on the N-oxidation of one of the two pyridine rings of the 4,4′-bipyridine skeleton. The main advantage of this methodology is the possible post-functionalization of the pyridine N-oxide, allowing selective introduction of chlorine, bromine or cyano groups in 2- and 2′-postions of the chiral atropisomeric 4,4′-bipyridines. The crystal packing in the solid state of some newly prepared derivatives was analyzed and revealed the importance of halogen bonds in intermolecular interactions.

scholarly journals A Facile Method to Realize Oxygen Reduction at the Hydrogen Evolution Cathode of an Electrolytic Cell for Energy-Efficient Electrooxidation

Materials ◽  
2021 ◽  
Vol 14 (11) ◽  
pp. 2841
Author(s):  
Zhiqiang Zhao ◽  
Lu Liu ◽  
Luofu Min ◽  
Wen Zhang ◽  
Yuxin Wang
Keyword(s):  
Oxygen Reduction ◽  
Electrochemical Oxidation ◽  
Hydrogen Evolution ◽  
Low Cost ◽  
Pollution Abatement ◽  
Electric Energy ◽  
Ammonium Persulfate ◽  
Electrolytic Cell ◽  
Reduction Reaction ◽  
Explosion Hazard

Electrochemical oxidation, widely used in green production and pollution abatement, is often accompanied by the hydrogen evolution reaction (HER), which results in a high consumption of electricity and is a potential explosion hazard. To solve this problem, we report here a method for converting the original HER cathode into one that enables the oxygen reduction reaction (ORR) without having to build new electrolysis cells or be concerned about electrolyte leakage from the O2 gas electrode. The viability of this method is demonstrated using the electrolytic production of ammonium persulfate (APS) as an example. The original carbon black electrode for the HER is converted to an ORR electrode by first undergoing in situ anodization and then contacting O2 or air bubbled from the bottom of the electrode. With this sole change, APS production can achieve an electric energy saving of up to 20.3%. Considering the ease and low cost of this modification, such significant electricity savings make this method very promising in the upgrade of electrochemical oxidation processes, with wide potential applications.

Recent progress in pristine MOF-based catalysts for electrochemical hydrogen evolution, oxygen evolution and oxygen reduction

2021 ◽  
Author(s):  
Lili Fan ◽  
Zixi Kang ◽  
Mengfei Li ◽  
Daofeng Sun
Keyword(s):  
Oxygen Reduction Reaction ◽  
Oxygen Reduction ◽  
Hydrogen Evolution ◽  
Oxygen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Oxygen Evolution Reaction ◽  
Recent Progress ◽  
Metal Organic Frameworks ◽  
Reduction Reaction ◽  
Metal Organic

Among various kinds of materials that have been investigated as electrocatalysts for hydrogen evolution reaction (HER), oxygen evolution reaction (OER) and oxygen reduction reaction (ORR), metal-organic frameworks (MOFs) emerge as...

Size-Dependent Enhancement of Electrocatalytic Oxygen-Reduction and Hydrogen-Evolution Performance of MoS2Particles

2013 ◽  
Vol 19 (36) ◽  
pp. 11939-11948 ◽  
Author(s):  
Tanyuan Wang ◽  
Dongliang Gao ◽  
Junqiao Zhuo ◽  
Zhiwei Zhu ◽  
Pagona Papakonstantinou ◽  
...  
Keyword(s):  
Oxygen Reduction ◽  
Hydrogen Evolution ◽  
Size Dependent ◽  
Electrocatalytic Oxygen Reduction

Recent Advances in Photo-Assisted Electrocatalysts for Energy Conversion

2021 ◽  
Author(s):  
Haoyue Zhang ◽  
Fang Song
Keyword(s):  
Carbon Dioxide ◽  
Energy Conversion ◽  
Oxygen Reduction ◽  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Carbon Dioxide Reduction ◽  
Reduction Reaction ◽  
Recent Advances ◽  
Storage Technologies ◽  
Electrochemical Energy

Electrocatalysts are essential for the widespread of promising electrochemical energy conversion/storage technologies, where oxygen reduction/evolution reaction (ORR/OER), hydrogen evolution reaction (HER), and carbon dioxide reduction reaction (CRR) are intensively involved....

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