Electrochemical CO2 to CO reduction at high current densities using a nanoporous gold catalyst

We report on integrating ultrathin monolithic nanoporous gold (npAu) catalyst coatings for CO2 reduction in a large electrode area (25 cm2) electrochemical membrane reactor with gas diffusion electrodes at 100 mA/cm2. The CO Faraday efficiency increases with increasing thickness, from 65% to 75% and...

Full description

Saved in:
Bibliographic Details
Published inMaterials research letters Vol. 9; no. 2; pp. 99 - 104
Main Authors Qi, Zhen, Biener, Monika M, Kashi, Ajay R, Hunegnaw, Sara, Leung, Alvin, Ma, Sichao, Huo, Ziyang, Kuhl, Kendra P, Biener, Juergen
Format Journal Article
LanguageEnglish
Published New York Taylor & Francis Ltd 01.02.2021
Taylor & Francis Group
Subjects
Carbon dioxide
Catalysts
Coated electrodes
Current density
dealloying
Diffusion electrodes
electrocatalyst
electrochemical co2 reduction
Electrodes
gas diffusion electrode
Gaseous diffusion
Gold
Membrane reactors
nanoporous gold
Reduction
Online AccessGet full text

Cover

More Information
Summary:We report on integrating ultrathin monolithic nanoporous gold (npAu) catalyst coatings for CO2 reduction in a large electrode area (25 cm2) electrochemical membrane reactor with gas diffusion electrodes at 100 mA/cm2. The CO Faraday efficiency increases with increasing thickness, from 65% to 75% and 80% for 1, 5, and 10 layers of npAu leaves where each npAu leaf layer is 100 nm thick. For the one npAu leaf layer configuration, this corresponds to an extremely high CO current density of 955 A/g gold thus demonstrating the potential for commercial applications.
ISSN:2166-3831
DOI:10.1080/21663831.2020.1842534