Tekofosynteesin läpimurto puhtaaseen kemiaan

A team of researchers from the University of Cambridge and other leading institutions just unveiled an artificial leaf. This unique design can replicate photosynthesis, opening the door for several use cases across leading industries. Here’s how artificial leaves could result in a greener chemical industry and much more.

Kemianteollisuus

Chemical manufacturers play a crucial role in today’s economy, providing the key ingredients for everything from the fertilizer used to grow your food to medicines, plastics, and even beauty supplies. According to recent raporttien, the global chemical industry is a massive and complex market valued at +$6.324T in 2025. This value demonstrated a 2.3% growth rate over the previous year. Of course, all of this growth and production comes at a cost to the environment.

Merkittävä saastuttaja

The chemical industry consumes around 10% of all fossil fuels and is responsible for 5-6% of CO₂ emissions globally. Additionally, the industry is responsible for 20% of all freshwater usage. Raportit show that over 100M chemicals have been artificially created globally as a direct result of chemical manufacturing.
Harmful chemicals like persistent organic pollutants (POPs), per- and polyfluoroalkyl substances (PFAS), and endocrine-disrupting chemicals (EDCs) cause direct harm to the environment and its inhabitants. Worst of all, they remain in the environment for decades and can even combine with other chemicals to create more harmful compounds.

Synteettinen katalyytti

For years, engineers have sought out ways to tackle this complex problem. As such, they have begun to break down the industry and evaluate every possible way to de-fossilize it. One strategy focuses on the use of synthetic catalysts or inorganic semiconductors.
Synthetic catalysts are manmade chemicals that are specifically designed to accelerate complex chemical reactions without interfering with their results. Today, these chemicals are used in everything from petroleum cracking to creating plastics. As such, there’s a strong push to replace all non-innocent chemical components like Good’s buffers, electron mediators, and sacrificial reagents.

Nykyiset ratkaisut

Semi-artificial photosynthesis is one approach that continues to gain traction in the industry. This method of accelerating chemical reactions relies on photoelectrochemical biohybrids to accomplish the same task. Utilizing bioengineered enzymes, engineers have been able to enable complex chemical conversions with high selectivity and efficiency.
This strategy has seen several improvements, including being able to manufacture light-harvesting semiconductors and biocatalysts into a single compact device. Using this approach, engineers can optimize certain components to enhance specific capabilities. However, there are still many technological hurdles that have limited adoption in photoelectrochemical (PEC) applications.

Ongelmia näiden lähestymistapojen kanssa

One main issue with today’s semi-artificial photosynthesis devices is that they lack stability. This lack of stability is because its chemical composition changes rapidly, meaning that to keep it stable requires a constant influx of specific chemical compounds, including kinetically fast buffers, which help to offset pH differences. Diffusion mediators are another example, as they transfer charge from light absorbers to biocatalysts.
Industrial catalysts are both expensive and toxic. These factors complicate working with them, resulting in additional costs and precautions. Also, these chemicals are non-innocent, meaning that they contribute to oxidation in metals. When this scenario occurs, it can cause contamination, catalyst inhibition, or poisoning of the entire process.

Keinotekoisten lehtien tutkimus

The study¹, Semi-artificial leaf, interfacing organic semiconductors and enzymes for solar chemical synthesis, published in the scientific journal Joule, introduces a novel organic photovoltaic (OPV) design that can conduct direct semi-artificial photosynthesis without utilizing harmful catalysts.

Lähde – Joule