In the present study, a new gas diffusion electrode (GDE) (based on Pt/Nafion membrane) is fabricated. The electrochemical results show that the new GDE has the highest electrochemical activity toward the oxygen reduction reaction (ORR) among the three electrodes. The SEM and XRD findings show that a platinum layer can be attached to Nafion membrane closely and firmly with a strong peak corresp...

This paper presents a two-dimensional computational model of micro-structured cathodic electrodes featuring nano-porous gas diffusion media that increase the surface to volume ratio of the deposited catalyst layer. A key objective of the modeling effort is to elucidate the Knudsen diffusion within the nano-porous electrode. In addition, the model is non-isothermal and resolves the natural conve...

The electrocatalytic reduction of carbon dioxide (CO2) to liquid fuels has tremendous positive impacts on atomospheric carbon balance and help to reduce global warming issues. This paper reviewed current knowledge of electrochemical CO2 reduction to small organic molecule fuels on metal catalysts and gas-phase CO2 reduction techniques based on gas diffusion electrode and solid polymer electroly...

To maintain local pH levels near the electrode during electrochemical reactions, the use of buffer solutions is effective. Nevertheless, the critical effects of the buffer concentration on electrocatalytic performances have not been discussed in detail. In this study, two fundamental electrochemical reactions, oxygen reduction reaction (ORR) and hydrogen oxidation reaction (HOR), on a platinum ...

The oxygen gas electrode has been studied for a number of mixed conducting oxide surface layers on top of Gd2Zr20 I (TGZO) solid electrolytes. In part II of this paper we present the results of frequency dispers on measurements for the electrode reaction, supplying additional information to the results of current-overvoltage experiments presented in part I. For both kinds of experiments the sam...

The oxygen gas electrode has been studied for a number of mixed conducting oxide surface layers on top of GdpZr20 P (TGZO) solid electrolytes. In part II of this paper we present the results of frequency dispers on measurements for the electrode reaction, supplying additional information to the results of current-overvoltage experiments presented in part I. For both kinds of experiments the sam...

A biocathode was designed by the modification of a carbon nanotube (CNT) gas-diffusion electrode with bilirubin oxidase from Bacillus pumilus, achieving high current densities up to 3 mA cm(-2) for the reduction of O2 from air. A membraneless air-breathing hydrogen biofuel cell was designed by combination of this cathode with a functionalized CNT-based hydrogenase anode.

The solid oxide electrochemical cell (SOC) is an energy conversion technology that can be operated reversibly, to efficiently convert chemical fuels to electricity (fuel cell mode) as well as to store electricity as chemical fuels (electrolysis mode). The SOC fuel-electrode carries out the electrochemical reactions CO2 + 2e(-) ↔ CO + O(2-) and H2O + 2e(-) ↔ H2 + O(2-), for which the electrocata...

Electrochemical CO2 reduction is a promising carbon capture and utilisation technology. Herein, continuous flow gas diffusion electrode (GDE)-cell configuration has been studied to convert via electrochemical under atmospheric conditions. To this purpose, Cu-based electrocatalysts immobilised on porous conductive GDE have tested. Many system variables evaluated find the most conditions able lea...