Strong Correlation between the Dynamic Chemical State and Product Profile of Carbon Dioxide Electroreduction
Journal
ACS Applied Materials and Interfaces
Journal Volume
14
Journal Issue
20
Pages
22681-22696
Date Issued
2022
Author(s)
Abstract
Utilizing renewable electricity energy to convert CO2into fuels and chemicals, namely, CO2electrocatalytic reduction reaction (CO2RR), is becoming increasingly significant yet challenged by low activity and selectivity. Recently, a growing number of studies have demonstrated that oxidized species can surprisingly survive on the catalyst surface under highly cathodic CO2RR conditions and play crucial roles in affecting the product selectivity. However, dynamic evolutions of the surface chemical state together with its real correlation to the product selectivity are still unclear, which is one of the most controversial topics for CO2RR. Herein, we particularly resurvey recent CO2RR researches that are all based on advanced in situ/operando methodologies, aiming to clearly reveal the realistic variations in surface chemical state under the working conditions. Then, recent progress in the regulation of the surface chemical state toward specific CO2RR products in current state-of-the-art catalysts with varying metal centers is systematically summarized, which shows an impressive relation between the dynamic chemical state and product profile. Next, we further highlight the developed strategies to regulate the surface chemical state in catalysts and discuss the debates over the effects of chemical state on product profile during CO2RR. Finally, on the basis of previous achievements, we present major challenges and some perspectives for the exploration of the imperative chemical state sensitivity to product profile during CO2RR. © 2022 American Chemical Society. All rights reserved.
Subjects
carbon dioxide; catalyst; electrocatalytic reduction reaction; renewable energy
Other Subjects
Catalyst selectivity; Electrolytic reduction; Chemical products; Chemical state; Electrocatalytic reduction; Electrocatalytic reduction reaction; Product selectivities; Reduction reaction; Renewable energies; Strong correlation; Surface chemical state; ]+ catalyst; Carbon dioxide
Type
review