Global prospects of low-carbon photocatalytic hydrogen based on regionalised optimisation

This project introduces a method to evaluate and improve solar‑driven photocatalytic hydrogen production worldwide. It uses a bottom‑up, region‑by‑region optimization that links an experimental kinetic model of photocatalysis with high‑resolution global data on direct normal irradiance and ambient air temperature measured at more than 11,000 locations. To keep the approach environmentally and socially acceptable, the study only looks at land that is degraded or desert and that lies outside key biodiversity areas. For each possible site, the method calculates the local hydrogen output and the life‑cycle greenhouse‑gas emissions, aiming to keep the carbon footprint as low as possible. The framework provides numbers for global hydrogen production capacity and compares those

numbers to projected future hydrogen demand and the climate‑change limits on emissions. It offers practical guidance for regional energy planning, scaling the technology, and reducing environmental impact in green chemical engineering. The work also creates a solid base for placing solar‑to‑chemical energy systems in the most suitable locations.

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