scholarly journals Mass transport in a hydrogen gas diffusion electrode

1993 ◽  
Vol 23 (12) ◽  
Author(s):  
J.J.T.T. Vermeijlen ◽  
L.J.J. Janssen
Keyword(s):  
Mass Transport ◽  
Gas Diffusion ◽  
Gas Diffusion Electrode ◽  
Hydrogen Gas

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).

Mechanism of the Hydrogen Gas Diffusion Electrode

1964 ◽  
Vol 111 (9) ◽  
pp. 1078 ◽  
Author(s):  
Raymond P. Iczkowski
Keyword(s):  
Gas Diffusion ◽  
Gas Diffusion Electrode ◽  
Hydrogen Gas

scholarly journals Testing a Silver Nanowire Catalyst for the Selective CO2 Reduction in a Gas Diffusion Electrode Half-cell Setup Enabling High Mass Transport Conditions

2019 ◽  
Vol 73 (11) ◽  
pp. 922-927 ◽  
Author(s):  
María de Jesús Gálvez-Vázquez ◽  
Shima Alinejad ◽  
Huifang Hu ◽  
Yuhui Hou ◽  
Pavel Moreno-García ◽  
...  
Keyword(s):  
Mass Transport ◽  
Co2 Reduction ◽  
Reaction Rates ◽  
Gas Diffusion ◽  
Reduction Reaction ◽  
Liquid Electrolyte ◽  
Gas Diffusion Electrode ◽  
Silver Nanowire ◽  
High Mass ◽  
Half Cell

In this work, we discuss the application of a gas diffusion electrode (GDE) setup for benchmarking electrocatalysts for the reductive conversion of CO2 (CO2 RR: CO2 reduction reaction). Applying a silver nanowire (Ag-NW) based catalyst, it is demonstrated that in the GDE setup conditions can be reached, which are relevant for the industrial conversion of CO2 to CO. This reaction is part of the so-called 'Rheticus' process that uses the CO for the subsequent production of butanol and hexanol based on a fermentation approach. In contrast to conventional half-cell measurements using a liquid electrolyte, in the GDE setup CO2 RR current densities comparable to technical cells (>100 mA cm–2) are reached without suffering from mass transport limitations of the CO2 reactant gas. The results are of particular importance for designing CO2 RR catalysts exhibiting high faradaic efficiencies towards CO at technological reaction rates.

Hydrogen Gas Diffusion Electrode Prepared from Porous Carbon Spheres Dispersed with Pd–Ag Alloy Nanoparticles

2007 ◽  
Vol 80 (11) ◽  
pp. 2243-2245
Author(s):  
Masataka Horigome ◽  
David A. Pacheco Tanaka ◽  
Margot A. Llosa Tanco ◽  
Waki Yukita ◽  
Kiyoshi Kobayashi ◽  
...  
Keyword(s):  
Porous Carbon ◽  
Gas Diffusion ◽  
Gas Diffusion Electrode ◽  
Hydrogen Gas ◽  
Alloy Nanoparticles ◽  
Carbon Spheres ◽  
Porous Carbon Spheres
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