Advanced Impedance Analysis for Performance Degradation during Low-Temperature CO2 Electroreduction DOI
Qinhao Chen, Alexander Kube, Dennis Kopljar

et al.

ACS Energy Letters, Journal Year: 2024, Volume and Issue: unknown, P. 6096 - 6103

Published: Nov. 26, 2024

Electrochemical impedance spectroscopy (EIS) is a powerful tool commonly used to study electrochemical systems. Nevertheless, its application in CO2 electroreduction has been so far limited due complex reaction mechanism and environment. Although initial findings have demonstrated the viability of applying EIS analysis electrolyzers, assignment individual processes spectra remains ambiguous. Therefore, more detailed investigation, especially focused on evaluating degradation mechanisms, essential. In this study, stable gas diffusion electrode (GDE) system was developed for comprehensive distribution relaxation time (DRT) evaluation assess key mechanisms under accelerated stress conditions such as high current density low operating temperature. Validated by post-mortem complementary methods, we demonstrate approach operando monitoring assigning mechanistic GDE linking them performance over time.

Language: Английский

Developing Practical Catalysts for High‐Current‐Density Water Electrolysis DOI Open Access
Xiaohan Zhang,

Chentian Cao,

Tao Ling

et al.

Advanced Energy Materials, Journal Year: 2024, Volume and Issue: 14(45)

Published: Oct. 28, 2024

Abstract High‐current‐density water electrolysis is considered a promising technology for industrial‐scale green hydrogen production, which of significant value to energy decarbonization and numerous sustainable industrial applications. To date, substantial research advancements are achieved in catalyst design laboratory‐based electrolysis. While the designed catalysts demonstrate remarkable performance at low current densities, they suffer from marked deteriorations both activity long‐term stability under industrial‐level high‐current‐density operations. provide timely assessment that helps bridge gap between laboratory‐scale fundamental practical technology, here various commercial electrolyzers first systematically analyzed, then key parameters including work temperature, density, lifetime stacks, cell efficiency, capital cost stacks critically evaluated. In addition, impact high density on electrocatalytic behavior catalysts, intrinsic activity, stability, mass transfer, discussed advance design. Therefore, by covering range critical issues material principles parameters, future directions development highly efficient low‐cost presented procedure screening laboratory‐designed outlined.

Language: Английский

Citations

13
Salt Precipitation and Water Flooding Intrinsic to Electrocatalytic CO2 Reduction in Acidic Membrane Electrode Assemblies: Fundamentals and Remedies DOI Creative Commons
Qianqian Bai,

Likun Xiong,

Yongjia Zhang

et al.

EES Catalysis, Journal Year: 2024, Volume and Issue: unknown

Published: Jan. 1, 2024

The fundamentals of salt precipitation and water flooding in membrane electrode assemblies for acidic electrocatalytic CO 2 reduction are discussed potential remedies via engineering electrodes, electrolytes, membranes proposed.

Language: Английский

Citations

6
An Interfacial Engineering Approach toward Operation of a Porous Solid Electrolyte CO2 Electrolyzer DOI
Luke Cherniack, Kentaro U. Hansen,

Zoushuang Li

et al.

ACS Energy Letters, Journal Year: 2025, Volume and Issue: unknown, P. 1508 - 1516

Published: March 5, 2025

Waste CO2 can be repurposed as a carbon feedstock for synthesizing valuable chemicals via electrolysis. Porous solid electrolyte (PSE) electrolysis has been demonstrated an economically viable method to produce high purity products. This work applies interfacial engineering approach determine key factors improve performance in PSE electrolyzers. We standardize the assembly by binding ionic resin into ionomer wafer and utilize Computational Fluid Dynamics (CFD) design gaskets uniform fluid flow. employ distribution of relaxation times (DRT) that anionic-conducting interfaces are primary contributor energy losses. To address this, we demonstrate enhancing contact between cathode anion exchange membrane (AEM) AEM-ionic interface allows low overpotential deionized water operation.

Language: Английский

Citations

0
The insights into ionomer-catalyst interactions enabling high-efficiency CO2 electroreduction in pure water DOI
Rui Xue, Shu Yuan,

Rongyi Wang

et al.

Journal of Energy Chemistry, Journal Year: 2025, Volume and Issue: unknown

Published: May 1, 2025

Language: Английский

Citations

0
Sulfur vacancy-rich ZnS on ordered microporous carbon frameworks for efficient photocatalytic CO2 reduction DOI

Xiaowu Gao,

Linglong Li,

Ziwei Zhao

et al.

Applied Catalysis B Environment and Energy, Journal Year: 2024, Volume and Issue: unknown, P. 124835 - 124835

Published: Nov. 1, 2024

Language: Английский

Citations

3
Flow Field Design Matters for High Current Density Zero-Gap CO2 Electrolyzers DOI
Shu Yuan,

Rongyi Wang,

Rui Xue

et al.

ACS Energy Letters, Journal Year: 2024, Volume and Issue: unknown, P. 5945 - 5954

Published: Nov. 21, 2024

The commercialization of CO2 electrolyzers requires higher current densities. This work demonstrates the necessity flow field optimization for developing high-current-density electrolyzers. Using three typical fields (serpentine, parallel, and interdigitated) as tools combining multiple characterization techniques, we investigated principles further optimization. We recognized that optimizing involves more than enhancing distribution uniformity ensuring no starvation. It is also necessary to provide flow-through transport while suppressed drainage behavior. Optimizing based on this principle, fabricated a multiserpentine field, it realized high CO selectivity about 95% at 0–350 mA cm–2 with 0.1 M KHCO3 50 °C cell temperature. Meanwhile, achieves maximum partial density 409 cm–2, which 43.5% conventional parallel field.

Language: Английский

Citations

2
Advanced Impedance Analysis for Performance Degradation during Low-Temperature CO2 Electroreduction DOI
Qinhao Chen, Alexander Kube, Dennis Kopljar

et al.

ACS Energy Letters, Journal Year: 2024, Volume and Issue: unknown, P. 6096 - 6103

Published: Nov. 26, 2024

Electrochemical impedance spectroscopy (EIS) is a powerful tool commonly used to study electrochemical systems. Nevertheless, its application in CO2 electroreduction has been so far limited due complex reaction mechanism and environment. Although initial findings have demonstrated the viability of applying EIS analysis electrolyzers, assignment individual processes spectra remains ambiguous. Therefore, more detailed investigation, especially focused on evaluating degradation mechanisms, essential. In this study, stable gas diffusion electrode (GDE) system was developed for comprehensive distribution relaxation time (DRT) evaluation assess key mechanisms under accelerated stress conditions such as high current density low operating temperature. Validated by post-mortem complementary methods, we demonstrate approach operando monitoring assigning mechanistic GDE linking them performance over time.

Language: Английский

Citations

0