Berlin 2024 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 96: Solid-Liquid Interfaces IV: Reactions and Electrochemistry

O 96.4: Topical Talk

Donnerstag, 21. März 2024, 15:45–16:15, TC 006

Importance of charge transfer descriptor for the computational screening of electrocatalysts — •Stefan Ringe — Korea University, Seoul, Rep. of Korea

Electrochemistry has become a key player in establishing a global sustainable energy landscape. Unfortunately, most electrochemical processes are limited in their efficiency and selectivity which has prevented them from replacing carbon-intensive industrial processes. Computational simulations have the potential to conquer the vast chemical space and reveal so far unconsidered new electrocatalysts and boost the performance of these devices. This, however, requires the knowledge of computationally accessible activity and selectivity descriptors. In this work, and by the example of electrochemical CO2 reduction, it is shown that the conventionally considered adsorption energy descriptor is not enough to distinguish product selectivity among catalysts. Including specifically the electrochemical environment in the quantum chemical calculations, we find that a charge-transfer descriptor is separately required, such as the work function or the potential of zero charge. With this, experimental trends in product selectivity can be well described, thus providing a new set of descriptors for high-throughput screening of electrocatalysts.

Keywords: CO2 reduction; Catalyst screening; Electric double layer; Density functional theory; Implicit solvation