Oregon State Researchers Develop Light-Driven Material to Produce Green Hydrogen from Water

Researchers at Oregon State University have created a new class of materials that can use light to produce hydrogen from water, offering a potentially cleaner way to convert solar energy into fuel, ScienceDaily reported. Led by Kyriakos Stylianou of the OSU College of Science, the team developed a photocatalyst called BVR-19 that relies on an unusual sulfide-to-sulfide bond rather than an expensive metal catalyst to drive chemical reactions.

How BVR-19 Uses Sulfur Bonds to Produce Hydrogen

The BVR-19 material is a metal-organic framework, or MOF, which is a crystalline, porous structure built from positively charged metal ions surrounded by organic linker molecules. Unlike traditional catalysts that rely primarily on metal atoms to move electrons, BVR-19 uses its sulfur-containing organic building blocks. Stylianou explained that the organic component does the important work by capturing light energy and moving electrons where they are needed to produce hydrogen.

When exposed to light, the unusual sulfide-to-sulfide bond inside BVR-19 temporarily breaks to produce highly reactive sulfur species. This design approach eliminates the need for an additional expensive metal catalyst, which could simplify the construction of future light-driven hydrogen-production systems. BVR-19 forms spontaneously in aqueous solutions at room temperature, reducing the energy required for manufacture.

Contrasting Conventional Methane-Reforming with Solar Fuel Production

Producing hydrogen by splitting water with a catalyst offers an alternative to the dominant industrial method known as methane-steam reforming, which relies on natural gas and releases carbon dioxide while generating hydrogen. While existing water-splitting methods often use electrocatalysis driven by electricity, their environmental benefits depend heavily on whether that electricity comes from low-cost renewable sources.

Economic hurdles remain significant across these methods. According to figures cited in UA.News, hydrogen produced through conventional methane-steam reforming costs about $1.50 per kilogram, while green hydrogen costs approximately $5 per kilogram. Stylianou noted that the team’s work provides a blueprint for designing better materials that can eventually bring down the cost of green hydrogen by establishing new design rules for solar fuel production.