Oregon State researchers create photocatalyst that produces hydrogen from water

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Researchers at Oregon State University have developed a new photocatalyst that uses light to produce hydrogen from water. The material, a metal organic framework called BVR-19, does not require an additional expensive metal catalyst. The findings were published in the Journal of the American Chemical Society.
Key Facts
- The photocatalyst BVR-19 contains an unusual sulfide-to-sulfide bond that breaks under light, producing reactive sulfur species.
- BVR-19 forms spontaneously in aqueous solutions at room temperature, reducing the energy needed for its synthesis.
- The research was led by Kyriakos Stylianou of the OSU College of Science.
- Conventional hydrogen production via methane-steam reforming releases carbon dioxide.
Photocatalyst Design
The material BVR-19 uses its sulfur-containing organic building blocks to capture light energy and move electrons for hydrogen production. This approach differs from conventional photocatalysts that rely primarily on metal atoms. The organic component does the important work, according to Stylianou. BVR-19 does not require an additional expensive metal catalyst, which could simplify future light-driven hydrogen-production systems.
Metal Organic Frameworks
Metal organic frameworks are crystalline, porous materials built from positively charged metal ions surrounded by organic linker molecules. Their tiny pores and adjustable structures allow scientists to fine-tune their properties for different applications. Millions of different MOF structures are theoretically possible, and researchers have already synthesized nearly 100,000 of them. The properties of roughly another half-million MOFs have been predicted.
Cleaner Hydrogen Production
Producing hydrogen by splitting water with a catalyst can be cleaner than the dominant industrial method, which relies on natural gas. The conventional process, known as methane-steam reforming, releases carbon dioxide while producing hydrogen. Hydrogen is widely used in fuel cells for vehicles, as well as in the production of ammonia, metal refining, and plastics manufacturing.