scholarly journals Electrochemical Polymerization Provides a Function‐Integrated System for Water Oxidation

2021 ◽  
Author(s):  
Hikaru Iwami ◽  
Masaya Okamura ◽  
Mio Kondo ◽  
Shigeyuki Masaoka
Keyword(s):  
Water Oxidation ◽  
Electrochemical Polymerization ◽  
Integrated System

Immobilization of a molecular cobalt cubane catalyst on porous BiVO4via electrochemical polymerization for efficient and stable photoelectrochemical water oxidation

2019 ◽  
Vol 55 (10) ◽  
pp. 1414-1417 ◽  
Author(s):  
Wenchao Jiang ◽  
Xiaoxuan Yang ◽  
Fei Li ◽  
Qian Zhang ◽  
Siyuan Li ◽  
...  
Keyword(s):  
Water Oxidation ◽  
Electrochemical Polymerization ◽  
Photoelectrochemical Water Oxidation

A cobalt cubane catalyst was immobilized onto a BiVO4 electrode via electrochemical polymerization to fabricate hybrid photoanodes for stable photoelectrochemical water oxidation.

scholarly journals Switching the O-O Bond Formation Pathways of Ru-pda Water Oxidation Catalyst by Third Coordination Sphere Engineering

Research ◽  
2021 ◽  
Vol 2021 ◽  
pp. 1-11
Author(s):  
Yingzheng Li ◽  
Shaoqi Zhan ◽  
Lianpeng Tong ◽  
Wenlong Li ◽  
Yilong Zhao ◽  
...  
Keyword(s):  
Coordination Sphere ◽  
Water Oxidation ◽  
Density Functional ◽  
Electrochemical Polymerization ◽  
Bond Formation ◽  
Kinetic Studies ◽  
Oxidation Catalyst ◽  
Nucleophilic Attack ◽  
Formation Pathway ◽  
Axial Ligands

Water oxidation is a vital anodic reaction for renewable fuel generation via electrochemical- and photoelectrochemical-driven water splitting or CO2 reduction. Ruthenium complexes, such as Ru-bda family, have been shown as highly efficient water-oxidation catalysts (WOCs), particularly when they undergo a bimolecular O-O bond formation pathway. In this study, a novel Ru(pda)-type (pda2– =1,10-phenanthroline-2,9-dicarboxylate) molecular WOC with 4-vinylpyridine axial ligands was immobilized on the glassy carbon electrode surface by electrochemical polymerization. Electrochemical kinetic studies revealed that this homocoupling polymer catalyzes water oxidation through a bimolecular radical coupling pathway, where interaction between two Ru(pda)–oxyl moieties (I2M) forms the O-O bond. The calculated barrier of the I2M pathway by density-functional theory (DFT) is significantly lower than the barrier of a water nucleophilic attack (WNA) pathway. By using this polymerization strategy, the Ru centers are brought closer in the distance, and the O-O bond formation pathway by the Ru (pda) catalyst is switched from WNA in a homogeneous molecular catalytic system to I2M in the polymerized film, providing some deep insights into the importance of third coordination sphere engineering of the water oxidation catalyst.

scholarly journals Immobilising a cobalt cubane catalyst on a dye-sensitised TiO2 photoanode via electrochemical polymerisation for light-driven water oxidation

RSC Advances ◽  
2017 ◽  
Vol 7 (7) ◽  
pp. 4102-4107 ◽  
Author(s):  
Jialing Li ◽  
Yi Jiang ◽  
Qian Zhang ◽  
Xiaochen Zhao ◽  
Na Li ◽  
...  
Keyword(s):  
Water Oxidation ◽  
Electrochemical Polymerization ◽  
Dye Sensitized ◽  
Electrochemical Polymerisation ◽  
Tio2 Photoanode

A cobalt cubane catalyst Co4O4(O2CMe)4(4-vinylpy)4 was immobilised on a dye-sensitized TiO2 electrode via electrochemical polymerization for light-driven water oxidation.

FR-IR Molecular Microanalysis System

1990 ◽  
Vol 48 (2) ◽  
pp. 270-271
Author(s):  
John A. Reffner ◽  
William T. Wihlborg
Keyword(s):  
Fourier Transform ◽  
Fourier Transform Infrared ◽  
Integrated System ◽  
Morphological Examination ◽  
Fully Integrated ◽  
Ir Microscopy ◽  
Normal Functions ◽  
Infrared Microspectroscopy ◽  
Infrared Spectral ◽  
Ft Ir

The IRμs™ is the first fully integrated system for Fourier transform infrared (FT-IR) microscopy. FT-IR microscopy combines light microscopy for morphological examination with infrared spectroscopy for chemical identification of microscopic samples or domains. Because the IRμs system is a new tool for molecular microanalysis, its optical, mechanical and system design are described to illustrate the state of development of molecular microanalysis. Applications of infrared microspectroscopy are reviewed by Messerschmidt and Harthcock.Infrared spectral analysis of microscopic samples is not a new idea, it dates back to 1949, with the first commercial instrument being offered by Perkin-Elmer Co. Inc. in 1953. These early efforts showed promise but failed the test of practically. It was not until the advances in computer science were applied did infrared microspectroscopy emerge as a useful technique. Microscopes designed as accessories for Fourier transform infrared spectrometers have been commercially available since 1983. These accessory microscopes provide the best means for analytical spectroscopists to analyze microscopic samples, while not interfering with the FT-IR spectrometer’s normal functions.

Fate of sperm membrane in fertilized ova

1993 ◽  
Vol 51 ◽  
pp. 40-41
Author(s):  
Frank J. Longo
Keyword(s):  
Electron Microscopy ◽  
Electrical Activity ◽  
Sea Urchins ◽  
Morphological Changes ◽  
Integrated System ◽  
Electrophysiological Recording ◽  
Experimental Conditions ◽  
The Status ◽  
Sperm Membrane ◽  
Temporal And Spatial

Measurement of the egg's electrical activity, the fertilization potential or the activation current (in voltage clamped eggs), provides a means of detecting the earliest perceivable response of the egg to the fertilizing sperm. By using the electrical physiological record as a “real time” indicator of the instant of electrical continuity between the gametes, eggs can be inseminated with sperm at lower, more physiological densities, thereby assuring that only one sperm interacts with the egg. Integrating techniques of intracellular electrophysiological recording, video-imaging, and electron microscopy, we are able to identify the fertilizing sperm precisely and correlate the status of gamete organelles with the first indication (fertilization potential/activation current) of the egg's response to the attached sperm. Hence, this integrated system provides improved temporal and spatial resolution of morphological changes at the site of gamete interaction, under a variety of experimental conditions. Using these integrated techniques, we have investigated when sperm-egg plasma membrane fusion occurs in sea urchins with respect to the onset of the egg's change in electrical activity.

Sign in / Sign up

Export Citation Format

Share Document