The POWER CO₂ Days! | September 7–9, 2026 | Lyon, France Day 2: Nano Engineering Artificial photosynthesis offers a highly attractive route for converting CO₂ into energy-rich solar fuels while simultaneously mitigating greenhouse gas emissions. We are excited to welcome Valérie Keller (co-author Eliane Khoury) to present their latest research on gas-phase CO₂ photoreduction using water vapor as a proton source under visible and simulated solar irradiation. While TiO₂ remains