Volltext-Downloads (blau) und Frontdoor-Views (grau)

Use of suspended particles as a new approach to increase the active electrode area in water electrolysis experiments

  • The development of base metal electrodes that can act as active and stable oxygen generating electrodes in water electrolysis systems, especially at low pH levels, remains a challenge. The use of suspensions as electrolytes for water splitting has until recently been limited to photoelectrocatalytic approaches. A high current density (j=30 mA/cm2) for water electrolysis has been achieved at a very low oxygen evolution reaction (OER) potential (E=1.36 V vs. RHE) using a SnO2/H2SO4 suspension-based electrolyte in combination with a steel anode. More importantly, the high charge-to-oxygen conversion rate (Faraday efficiency of 88% for OER at j=10 mA/cm2 current density). Since cyclic voltammetry (CV) experiments show that oxygen evolution starts at a low, but not exceptionally low, potential, the reason for the low potential in chronoamperometry (CP) tests is an increase in the active electrode area, which has been confirmed by various experiments. For the first time, the addition of a relatively small amount of solids to a clear electrolyte has been shown to significantly reduce the overpotential of the OER in water electrolysis down to the 100 mV region, resulting in a remarkable reduction in anode wear while maintaining a high current density.

Export metadata

Additional Services

Search Google Scholar

Statistics

frontdoor_oas
Metadaten
Author:Danni Balkenhohl, Marten Huck, Tom Bookholt, Bettina Lilli, Dirk Enke, Klara Rüwe, Julia Brune, Diemo DaumORCiD, Helmut Schäfer
Title (English):Use of suspended particles as a new approach to increase the active electrode area in water electrolysis experiments
DOI:https://doi.org/10.1002/cctc.202400041
ISSN:1867-3880
ISSN:1867-3899
Parent Title (English):ChemCatChem.The European Society Journal for Catalysis
Document Type:Article
Language:English
Year of Completion:2024
Release Date:2024/04/05
Tag:Electrocatalysis; Oxygen evolution reaction; Solar to fuel conversion; Water-splitting
Faculties:Fakultät AuL
DDC classes:500 Naturwissenschaften und Mathematik / 540 Chemie
Review Status:Akzeptierte Fassung