Yanhui Sun, Xuemei Du, Honghao Fan, Jinhua Ye, Lequan Liu
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Strategies and Challenges of Utilizing Cation Effects in Membrane Electrode Assemblies for CO2 Reduction.
Electrocatalytic CO2 reduction in membrane electrode assembly (MEA) systems is a promising technology, enabling direct CO2 transport to the catalyst layers and reducing ohmic resistance. While electrolyte cations are demonstrated to effectively enhance the rate and the selectivity of electrochemical reduction of CO2, their implementation in electrolyte-free MEA electrolyzers faces significant challenges. This concept review examines key strategies for utilizing cations in MEA configurations, categorizing them into three methods: 1) incorporation of alkali metal cations into catalyst layers, 2) integration of organic cations into the cathode, and 3) mitigation of salt precipitation on the gas diffusion layers. By summarizing the challenges and proposed strategies, this review aims to provide guidance for the development of more efficient cation utilization approaches and future research in MEA-based CO2 reduction systems.
期刊介绍:
ChemPhysChem is one of the leading chemistry/physics interdisciplinary journals (ISI Impact Factor 2018: 3.077) for physical chemistry and chemical physics. It is published on behalf of Chemistry Europe, an association of 16 European chemical societies.
ChemPhysChem is an international source for important primary and critical secondary information across the whole field of physical chemistry and chemical physics. It integrates this wide and flourishing field ranging from Solid State and Soft-Matter Research, Electro- and Photochemistry, Femtochemistry and Nanotechnology, Complex Systems, Single-Molecule Research, Clusters and Colloids, Catalysis and Surface Science, Biophysics and Physical Biochemistry, Atmospheric and Environmental Chemistry, and many more topics. ChemPhysChem is peer-reviewed.