CO2 Reduction and Hydrogen Generation

A crucial aspect of our work lies in understanding the fundamental photophysical processes governing these catalytic reactions. To achieve this, we leverage spectroscopy, particularly transient absorption spectroscopy, to probe the excited-state carrier dynamics in these materials. By tracking charge carrier lifetimes, recombination pathways, and energy transfer mechanisms, we aim to unveil how these excited-state processes influence catalytic efficiency.

We have made significant progress in both photo and electrochemical CO₂ reduction:

• In our recent works, we have explored the potential of halide perovskites as catalysts for CO₂ photoreduction under varying light conditions​. Notably, our studies on Cs₂AgBiBr₆ double perovskites have shown that light intensity plays a crucial role in the efficiency of the catalytic process.

• Our group is also actively exploring other materials, such as TMDs, various heterojunctions, and composite materials, to investigate carrier dynamics and charge transfer mechanisms. Our goal is to improve the catalytic activity for both photo- and electrochemical CO₂ reduction and hydrogen generation.

Along with the optimization of the catalyst materials by the fundamental understanding, our group is also working on technological aspect of the field. We aim to translate fundamental understanding into practical applications by integrating perovskite-Si tandem solar cell technology with electrochemical cells for the sustainable production of hydrogen through water splitting and valuable chemicals via CO₂ reduction.