Heterogeneous Electrocatalysts for CO2 Reduction, 2nd Edition

A special issue of Catalysts (ISSN 2073-4344). This special issue belongs to the section "Electrocatalysis".

Deadline for manuscript submissions: 15 May 2025 | Viewed by 819

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Chemistry Department, Fudan University, Shanghai 200438, China
Interests: CO2 and nitrogen electroreduction; surface property; metal cluster catalysis
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Special Issue Information

Dear Colleagues,

After the success of this first Special Issue, focused on “Heterogeneous Electrocatalysts for CO2 Reduction”, available here, we propose the second edition, entitled “Heterogeneous Electrocatalysts for CO2 Reduction, 2nd Edition”.

Due to global warming and fossil fuel demand, the utilization of CO2 in value-added products has attracted much attention. The electrochemical conversion of CO2 and H2O into alcohol, hydrocarbon, synthesis gas, etc., presents a potential approach under mild conditions using renewable electricity. It is a challenge to find an electrocatalysis process with a low cost that is efficient in energy transformation and product selection.

Due to the sluggish kinetics of CO2, high activation energy is needed to initiate CO2 electroreduction by forming the CO2•– intermediate, and thus the onset potential is significantly more negative than the equilibrium potential of CO2 reduction. Although the electroreduction of CO2 to high-energy-density fuels and value-added chemical feedstocks is promising, the large overpotential of this process and the low activity and durability of the currently available catalysts still restrict this technique in terms of its large-scale commercialization.

This Special Issue is focused on the electrocatalytic CO2 reduction reaction (CO2RR) in order to establish an efficient electrocatalysis process. Substantial efforts are focused on suppressing the hydrogen evolution reaction (HER) and activating CO2 through the catalyst’s design and improvements in technology.

Dr. Linping Qian
Guest Editor

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Keywords

  • surface modification
  • metal morphology tuning
  • metal doping
  • metal alloying
  • single-atom metal catalysis
  • metal cluster catalysis
  • site vacancy
  • flow cell
  • membrane electrode assembly

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Published Papers (1 paper)

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Research

11 pages, 4932 KiB  
Article
Proton Pool for the Mitigation of Salt Precipitate Enhancing CO2 Electroreduction in a Flow Cell
by Yixi Chen, Bowen Wu and Linping Qian
Catalysts 2024, 14(11), 807; https://doi.org/10.3390/catal14110807 - 10 Nov 2024
Viewed by 669
Abstract
Flow cells featuring a gas diffusion electrode (GDE) have emerged as an attractive platform for electrochemical CO2 reduction, offering high current densities (~300 mA·cm−2) and low energy consumption. However, the formation of salt precipitates, particularly carbonate and bicarbonate, poses a [...] Read more.
Flow cells featuring a gas diffusion electrode (GDE) have emerged as an attractive platform for electrochemical CO2 reduction, offering high current densities (~300 mA·cm−2) and low energy consumption. However, the formation of salt precipitates, particularly carbonate and bicarbonate, poses a significant deficiency by reducing the cell’s operational longevity. In this study, we present a novel approach to mitigate salt precipitates in real-time through acid–base interaction. Recovery efficiency and partial current density of the cell were used to evaluate the capability of removing salt precipitates and the maintenance of CO2 reduction reactions (CO2RRs). It was suggested that the direct treatment of intermittent acid rinse recovers the performance of CO2RRs to a large extent (>97%), and the modification of the proton exchange resin reduces the reduction rate of partial current densities to 1/15 than that of the unmodified. This improvement enhances the cell’s catalytic performance, enabling the stability test for catalysts within the GDE-based flow cell. Full article
(This article belongs to the Special Issue Heterogeneous Electrocatalysts for CO2 Reduction, 2nd Edition)
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