US-based company SunHydrogen has developed a technology called Photoelectrosynthetically Active Heterostructures (PAH) – microscopic, multi‐layer nanoparticles that mimic the process of photosynthesis by using sunlight to split water molecules into hydrogen and oxygen. These nanoparticles act as tiny machines, pulling apart water at the molecular level and powered by sunlight. The hydrogen generated serves as a clean energy source, while oxygen is the only byproduct.  

Rather than relying on centralised hydrogen production methods that use fossil fuels and the grid – typically involving high capital costs, carbon emissions, water purification and complex power electronics – SunHydrogen’s approach bundles billions of PAH nanoparticles into solar hydrogen panels. These panels can be mass-produced and installed globally in localised settings or as high-density production farms. According to the company, the method is ‘efficient, cost-effective and truly green’ with a zero-carbon footprint.  

In August 2025, SunHydrogen announced a successful live demonstration of a commercial-scale 1.92 m² hydrogen module. The module, demonstrated in an open prototype housing, integrated solar collection with hydrogen generation – without needing connection to an electrical grid – and represents a key step in scaling up the technology.

‘Our 1.92 m² module demonstrates that hydrogen production directly from sunlight and water can progress beyond the laboratory to become a commercially viable clean energy solution,’ comments Dr Syed Mubeen, Chief Technology Officer at SunHydrogen.

Looking ahead, the company plans to test the 1.92 m² module in a closed, continuous-operation setup where hydrogen and oxygen are continuously extracted and water is recirculated. The pilot system will consist of 16 solar-to-hydrogen production reactors, arranged in a scalable modular array totalling over 30 m² of active area at the University of Texas’ Hydrogen ProtoHub in Austin.    

Over a six-month demonstration period, it will be operated outdoors with sunlight and water alone. The goal is to validate performance, durability and scalability in real-world conditions, producing operational data that can support commercial-scale deployment.

To support the upcoming pilot, SunHydrogen recently announced a partnership with GTI Energy. GTI Energy will provide safety review and on-site systems integration, bringing its experience in hydrogen technology development, standards and infrastructure to ensure the installation and operation of the demonstration meets rigorous technical and safety metrics.