Single-atom Ni integrated gas diffusion electrode for high performance carbon dioxide electroreduction

2020 ◽  
Vol 65 (9) ◽  
pp. 696-697 ◽  
Author(s):  
Run Shi ◽  
Tierui Zhang
Keyword(s):  
Carbon Dioxide ◽  
High Performance ◽  
Gas Diffusion ◽  
Gas Diffusion Electrode ◽  
Single Atom ◽  
Carbon Dioxide Electroreduction

Degradation of 4-chlorophenol by the anodic–cathodic cooperative effect with a Pd/MWNT gas-diffusion electrode

2012 ◽  
Vol 65 (11) ◽  
pp. 2010-2015 ◽  
Author(s):  
H. Wang ◽  
X. J. Wei ◽  
Z. Y. Bian
Keyword(s):  
High Performance ◽  
Amorphous Structure ◽  
Gas Diffusion ◽  
Gas Diffusion Electrode ◽  
X Ray Diffraction ◽  
Initial Ph ◽  
Multi Walled Carbon Nanotubes ◽  
Optimum Reaction ◽  
Average Size ◽  
Walled Carbon Nanotubes

Pd/multi-walled carbon nanotubes (MWNTs) catalyst used for the gas-diffusion electrode was prepared by ethylene glycol (EG) reduction and characterized by the X-ray diffraction (XRD) and scanning electron microscope (SEM). The results indicated that Pd particles with an average size of 8.0 nm were highly dispersed in the MWNTs with amorphous structure. In a diaphragm electrolysis system with a Ti/RuO2/IrO2 anode and the Pd/MWNT gas diffusion cathode, the degradation of 4-chlorophenol was performed by a combination of electrochemical reduction and oxidation. The combined process was in favor of improving 4-chlorophenol degradation efficiency. The optimum reaction conditions were as following: initial pH 7, aeration with hydrogen and air. Under the optimized electrolysis conditions the removal of 4-chlorophenol in the anodic and cathodic compartments were 98.5 and 90.5%, respectively. Additionally, based on the analysis of electrolysis intermediates using high performance liquid chromatography (HPLC) and ion chromatography (IC), the electrolysis degradation of 4-chlorophenol was proposed containing the intermediates, such as phenol, hydroquinone, benzoquinone, maleic acid, fumaric acid, succinic acid, malonic acid, oxalic acid, acetic acid and formic acid.

Gas diffusion electrode of high performance

1984 ◽  
Vol 160 (1-2) ◽  
pp. 351-357 ◽  
Author(s):  
Satoshi Motoo ◽  
Masahiro Watanabe ◽  
Nagakazu Furuya
Keyword(s):  
High Performance ◽  
Gas Diffusion ◽  
Gas Diffusion Electrode

Electrochemical degradation of pentachlorophenol on a palladium modified gas-diffusion electrode

2009 ◽  
Vol 59 (9) ◽  
pp. 1759-1767 ◽  
Author(s):  
H. Wang ◽  
J. L. Wang
Keyword(s):  
Removal Efficiency ◽  
Photoelectron Spectroscopy ◽  
High Performance ◽  
Hydrogen Reduction ◽  
Amorphous Structure ◽  
Gas Diffusion ◽  
Gas Diffusion Electrode ◽  
Hydrogen Gas ◽  
Electrochemical Degradation ◽  
X Ray

Pd/C catalyst was prepared by a hydrogen reduction method and used for making a Pd/C gas-diffusion electrode. It was fully characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), and cyclic voltammetry (CV). In the catalyst, Pd particles with an average size of 4.0 nm were highly dispersed in the activated carbon with an amorphous structure; Pd content on the surface of the Pd/C catalyst reached 1.3 at% (atomic concentration). The Pd/C gas-diffusion electrode was then used as the cathode to investigate the electrochemical degradation of pentachlorophenol (PCP) in a diaphragm electrolysis device, feeding firstly with hydrogen gas then with air, compared with the carbon/polytetrafluoroethylene (C/PTFE) gas-diffusion cathode. The Pd/C gas-diffusion cathode can not only reductively dechlorinate PCP by feeding hydrogen gas, but also accelerate the two-electron reduction of O2 to hydrogen peroxide (H2O2) by feeding air. Therefore, both the removal efficiency and the dechlorination degree of PCP exceeded 80% after 100 min, and the average removal efficiency of PCP in terms of total organic carbon (TOC) was more than 75% after 200 min by using Pd/C gas-diffusion cathode, which was better than that of the C/PTFE gas-diffusion cathode. Phenol was identified as the dechorination product using high-performance liquid chromatography (HPLC).

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