scholarly journals Nanostructured Copper-Based Electrodes Electrochemically Synthesized on a Carbonaceous Gas Diffusion Membrane with Catalytic Activity for the Electroreduction of CO2

2021 ◽  
Author(s):  
Martina Serafini ◽  
Federica Mariani ◽  
Andrea Fasolini ◽  
Erika Scavetta ◽  
Francesco Basile ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Gas Diffusion ◽  
Diffusion Membrane ◽  
Nanostructured Copper

scholarly journals Composition Dependence of Gas Diffusion Membrane on Sensor Characteristics for Detection of Toxic Gases

2006 ◽  
Vol 126 (1) ◽  
pp. 19-23
Author(s):  
Yoshitaka Mizutani ◽  
Hiroyuki Matsuda ◽  
Toru Ishiji ◽  
Nagakazu Furuya
Keyword(s):  
Composition Dependence ◽  
Gas Diffusion ◽  
Toxic Gases ◽  
Diffusion Membrane

Flow-injection analysis of phenols via bromination and detection of unreacted bromine at a platinized gas diffusion membrane electrode

1986 ◽  
Vol 58 (4) ◽  
pp. 983-985 ◽  
Author(s):  
Antonin. Trojanek ◽  
Stanley. Bruckenstein
Keyword(s):  
Flow Injection ◽  
Flow Injection Analysis ◽  
Gas Diffusion ◽  
Membrane Electrode ◽  
Diffusion Membrane

scholarly journals Improving Catalytic Activity in the Electrochemical Separation of CO2 Using Membrane Electrode Assemblies

2022 ◽  
Author(s):  
Nicholas Schwartz ◽  
Jason Harrington ◽  
Kirk J Ziegler ◽  
Philip Cox
Keyword(s):  
Electron Microscopy ◽  
Particle Size ◽  
Catalytic Activity ◽  
Electrochemical Impedance ◽  
Gas Diffusion ◽  
Rotating Disk Electrode ◽  
Constant Current ◽  
Membrane Electrode ◽  
Active Surface Area ◽  
Separation Of Co2

Abstract The direct electrochemically driven separation of CO2 from a humidified N2, O2, and CO2 gas mixture was conducted using an asymmetric membrane electrode assembly (MEA). The MEA was fabricated using a screen-printed ionomer bound Pt cathode, an anion exchange membrane (AEM), and ionomer bound IrO2 anode. Electrocatalyst materials were physically and chemically characterized prior to inclusion within the electrode. Electrochemical impedance spectroscopy (EIS) and linear sweep voltammetry (LSV) measurements using a rotating disk electrode (RDE) were used to quantify the catalytic activity and determine the effects of the catalyst-to-ionomer ratio. Catalysts were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), Brunauer–Emmett–Teller (BET) surface analysis, and (dynamic light scattering) DLS to evaluate catalyst structure, active surface area, and determine the particle size and bulk particle size distribution (PSD). The electrocatalyst layer of the electrodes were fabricated by screen printing a uniformly dispersed mixture of catalyst, dissolved anionic ionomer, and a solvent system onto an electrode supporting gas diffusion layer (GDL). Pt IrO2 MEAs were fabricated and current-voltage relationships were determined using constant-current measurements over a range of applied current densities and flow rates. Baseline reaction kinetics for CO2 separation were established with a standard set of Pt-IrO2 MEAs.

scholarly journals Amperometric Gas Sensor Using Gas Diffusion Membrane Consisting of Carbon Powder and Fluorocarbon

2004 ◽  
Vol 124 (11) ◽  
pp. 402-406 ◽  
Author(s):  
Yoshitaka Mizutani ◽  
Hiroyuki Matsuda ◽  
Toru Ishiji ◽  
Nagakazu Furuya
Keyword(s):  
Gas Sensor ◽  
Gas Diffusion ◽  
Carbon Powder ◽  
Diffusion Membrane

Characterisation of a gas-diffusion membrane-based optical flow-through sensor exemplified by the determination of nitrite

Talanta ◽  
2004 ◽  
Vol 64 (2) ◽  
pp. 278-282 ◽  
Author(s):  
Wolfgang Frenzel ◽  
Jürgen Schulz-Brüssel ◽  
Betty Zinvirt
Keyword(s):  
Optical Flow ◽  
Gas Diffusion ◽  
Flow Through ◽  
Diffusion Membrane

An Inexpensive Gas-Diffusion Membrane

1975 ◽  
Vol 6 (2) ◽  
pp. 49-49
Author(s):  
Melvin R. Click
Keyword(s):  
Gas Diffusion ◽  
Diffusion Membrane

scholarly journals A Reversible Spectrophotometric Method Based on a Coupled Microfluidic Chip for Highly Selective Ammonium Detection

2019 ◽  
Vol 2019 ◽  
pp. 1-8
Author(s):  
Hao Zhou ◽  
Yilin Song ◽  
Zheng Yang
Keyword(s):  
High Selectivity ◽  
Exchange Resin ◽  
Cation Exchange Resin ◽  
Gas Diffusion ◽  
Real Samples ◽  
Spectrum Change ◽  
The Stability ◽  
Detection Effect ◽  
Spectrum Data ◽  
Diffusion Membrane

A coupled chip aiming at economical and highly selective ammonium detection was fabricated. It consisted of a reaction chip, a gas-diffusion chip, and a detection chip. Zinc tetraphenylporphyrin dyed on the cation-exchange resin microbeads was used as the indicating material to avoid excess consumption for its reversibility. PDMS was selected as the material of the gas-diffusion membrane. A portable spectrometer was applied for spectrum analysis. By analysis of spectrum change, the high selectivity was confirmed because no component had interference on detection effect. Good performance was shown for all the tested concentrations (0.2–50 mg·L−1). The stability and reversibility were also judged by the spectrum data obtained from the indicating process and the recovering process. Finally, real samples containing ammonium were tested and the results were compared to those came from a standard method to confirm the accuracy of our method.

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