Atomically inner tandem catalysts for electrochemical reduction of carbon dioxide

Abstract

Tandem catalysis represents an efficient strategy for the electrochemical reduction of CO2 (CO2RR) into complex products, whereas the random CO migration in this process inevitably decreases the catalytic efficiency. Herein,...

Adjacent Metal Atomic Pairs Within Atomically Dispersed Catalysts for Reaching a Synergistic Electrocatalytic CO2 Reduction: A Review

“…Then, the in situ formed intermediates will be transferred to the other metal center and follow the subsequent multistep proton-coupled electron transfer (PCET) to obtain the ultimate products. [37] For bridge-type adsorption, a relatively strong M 1 -M 2 interaction occurs on AAPs owing to the close enough The spring between two adjacent metal atoms indicates the potential synergistic effect during ECR. Reproduced with permission.…”

“…Copyright 2023, Wiley-VCH. Reproduced with permission [37]. Copyright 2023, Royal Society of Chemistry.…”

“…d) Kinetic reaction activation energy of *CHO migration from Co center to Cr center with the hydrogenation step between *CHO and *OCH 2 on Co─N─Cr. Reproduced with permission [37]. Copyright 2023, Royal Society of Chemistry.…”

Cascade Dual Sites Modulate Local CO Coverage and Hydrogen-Binding Strength to Boost CO2 Electroreduction to Ethylene

“…[17][18][19]24 This design leads to the random migration of intermediate products, which may result in their readsorption on undesired sites or escape from the reaction system. 25 To address these issues, rational design and precise modulation of cascade catalysis at the atomic level over Cu-based materials are highly desirable. Herein, through theory-guided experiments, we found that introducing heterometal elements (such as Ag) into Cu 3 N nanocubes (NCs) at the atomic level to form cascade Ag−Cu dual sites could effectively improve the selectivity of C 2 products.…”

“…Cascade catalysis has been considered as an efficient strategy for improving C 2+ production via decoupling the multiple reaction steps into CO 2 -to-CO and CO-to-C 2+ conversion. − Recent research found that rationally increasing the surface coverage of adsorbed *CO and lowering the kinetic barrier of CO protonation into *CHO or *COH could facilitate the generation of C 2+ products via asymmetric C–C coupling. − Accordingly, constructing coupled catalytic sites to modulate *CO coverage and hydrogen-binding strength is crucial to enhancing the overall reaction rate for C 2+ production. However, previous reports on Cu-based cascade catalysts mainly focus on Cu-based bulk or nanostructures, which typically have several spatially separated active sites for multiple sequential procedures. − , This design leads to the random migration of intermediate products, which may result in their readsorption on undesired sites or escape from the reaction system . To address these issues, rational design and precise modulation of cascade catalysis at the atomic level over Cu-based materials are highly desirable.…”