Mapping Spatial and Temporal Electrochemical Activity of Water and CO2Electrolysis on Gas-Diffusion Electrodes Using Infrared Thermography

Hugo Pieter Iglesias Van Montfort, Thomas Burdyny*

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

2 Citations (Scopus)
21 Downloads (Pure)

Abstract

Electrolysis of water, CO2, and nitrogen-based compounds presents the opportunity of generating fossil-free fuels and feedstocks at an industrial scale. Such devices are complex in operation, and their performance metrics are usually reported as electrode-averaged quantities. In this work, we report the usage of infrared thermography to map the electrochemical activity of a gas-diffusion electrode performing water and CO2reduction. By associating the heat map to a characteristic catalytic activity, the presented system can capture electrochemical and physical phenomena as they occur in electrolyzers for large-scale energy applications. We demonstrate applications for catalyst screening, catalyst-degradation measurements, and spatial activity mapping for water and CO2electrolysis at current densities up to 0.2 A cm-2. At these current densities we report catalyst temperature increases (>10 K for 0.2 A cm-2) not apparent otherwise. Furthermore, substantial localized current density fluctuations are present. These observations challenge assumed local conditions, providing new fundamental and applied perspectives.

Original languageEnglish
Pages (from-to)2410-2419
JournalACS Energy Letters
Volume7
Issue number8
DOIs
Publication statusPublished - 2022

Fingerprint

Dive into the research topics of 'Mapping Spatial and Temporal Electrochemical Activity of Water and CO2Electrolysis on Gas-Diffusion Electrodes Using Infrared Thermography'. Together they form a unique fingerprint.

Cite this