Operando Insight into Nanoscale Electrocatalytic Interfaces for Carbon Dioxide Electrolysis

Carbon dioxide (CO2) electrolysis is a promising route for converting greenhouse gases into value-added products. However, the industrial viability of CO2 electrolyzers requires significant advances in electrocatalyst design for cathode CO2 reduction reaction (CO2RR) and anode oxygen evolution reaction (OER). The major challenge lies in understanding the structure-performance relationship, which is complicated due to the unusual sensitivity of the reactivity and product selectivity to the surface structure and the change of active materials under operando conditions. The project advocates the development and innovative application of multi-microscopy, with state-of-the-art SPM as the core technology, to exclude how nanostructured heterogeneity and structural dynamics affect catalytic performance, ultimately accelerating the discovery of electrocatalysts. The research scope includes: i) identifying active sites over a heterogeneous catalyst on the nanoscale by scanning electrochemical probe microscopy (SEPM) and corelative microscopies; ii) tracking and interpreting physicochemical dynamics of active sites under reaction conditions by electrochemical atomic force microscopy (AFM) and correlative spectroelectrochemical characterization and density functional theory modeling; iii) correlating knowledge of heterogeneous and dymanics to global performance of CO2 electrolysis flow-cell via rational design of electromaterials. The proposed program combines the unique expertise of the Host group in SEPM with the Fellow's extensive knowledge in AFM, heterogeneous electrocatalysis and nanoscience to create new paradigms that will advance electrocatalysis and energy fields. The Host group's support will enable the Fellow to develop valuable skills and establish a robust academic network, enhancing her career prospects.