Design and Engineering of 3DOM OER/ORR Electrocatalysts for PV-Integrated Photo-Rechargeable Zinc-Air Batteries

The transition toward sustainable energy technologies requires efficient systems for both renewable energy harvesting and energy storage. Photo-rechargeable zinc–air batteries represent a promising approach by combining solar energy conversion with electrochemical energy storage in a single integrated platform. In this project, we develop advanced three-dimensionally ordered macroporous (3DOM) electrocatalysts for the oxygen evolution reaction (OER) and oxygen reduction reaction (ORR), which are the key processes governing the performance of zinc–air batteries.

The research focuses on the rational design, synthesis, and optimization of functional oxide materials with tailored morphology, composition, and active-site structure. Particular attention is given to understanding how catalyst architecture influences charge transfer, catalytic activity, and long-term stability under operating conditions.

A major component of the project is the application of advanced synchrotron-based characterization techniques, including in situ and operando X-ray absorption spectroscopy (XAS) and in situ X-ray diffraction (XRD). These methods enable direct observation of structural and electronic changes occurring during catalyst synthesis and electrochemical operation, providing fundamental insight into active-site formation, reaction mechanisms, and degradation pathways.

By combining materials engineering, electrochemistry, and operando synchrotron investigations, the project aims to establish design principles for highly efficient, durable, and cost-effective electrocatalysts for next-generation solar energy conversion and storage technologies.

This project is funded by the National Science Centre (NCN), Poland, under the SONATA BIS 13 Program, Project no. 2023/50/E/ST5/00679.