Operando Impedance Spectroscopy Informed Dynamic Internal Resistance Compensation Mitigates Bubble-Induced Distortions of the Applied Potential
Year: 2025
Type: article
Abstract: High Resolution Image Download MS PowerPoint Slide Bubble formation during gas-evolving electrochemical reactions disrupts potential control and obscures intrinsic catalyst–performance relationships. While conventional strategies to mitigate this issue have relied on surface engineering or cell design, here we introduce a dynamic internal resistance (IR) compensation approach that adapts to bubble-induced fluctuations in real time. This was achieved by employing (i) operando electrochemical impedance spectroscopy (EIS), which provided the electrolyte resistance ( R Ohm ) parameter continuously, and (ii) a Python control loop to extract EIS data and dynamically adjust the IR compensation. This self-correcting approach effectively suppressed bubble-induced artifacts during prolonged electrochemical CO 2 reduction (ECO 2 R) on copper, enabling accurate performance evaluation and reliable assessment of catalyst instability under realistic operating conditions. We argue that such control is essential in ECO 2 R stability studies, where even minor potential shifts can obscure intrinsic catalyst–performance relationships and hinder mechanistic insight into degradation.
Source: ACS electrochemistry.
Language: English
Field: Energy
Domain: Physical Sciences
Open Access status: hybrid
Estimated APC paid: $4,500
Awards: G2051776107, Electrochemically grown bimetallic Cu-Zn nanostructured catalysts for cost efficient electrochemical carbon dioxide reduction into added-value chemicals, Unlocking the Selective Catalytic Conversion Processes of CO2 to Ethanol – UliSess, Advanced materials for low-carbon and sustainable society, Infrastructural program of National institute of Chemistry, Pt-based intermetallic alloy catalysts for improved performance of high-temperature PEM fuel cells with reduced Pt loading, Fundamental understanding of Hydrogen Evolution Reaction for a new generation of nickel-based electrocatalysts in alkaline water and chlor-alkali electrolysis, Analytics and Chemical Characterization of Materials and Processes, Enhancing the Performance of Energy Conversion and Storage Systems through 2D Modified Electrochemical Interfaces
OpenAlex ID: W4415143191