Korean researchers improve hydrogen production efficiency by rewriting catalysts’ DNA
In South Korea, the idea that DNA is only a molecule that stores genetic information is being challenged. KAIST researchers have developed a technology that controls the chemical environment around catalysts at the nanometer scale by designing DNA sequences, the arrangement of A, T, G, and C that make up genetic information. The team has presented a new catalyst platform that can improve hydrogen production efficiency and increase the yield of desired chemical products by designing DNA much like writing a computer program.
The research team has developed a core technology that precisely controls the microscopic chemical environment around catalysts by coating the surface of gold nanoparticles, ultrafine gold particles measuring 1–100 nm, with “single-stranded DNA,”a flexible DNA molecule composed of a single strand that can be designed with a desired length and structure and serves as a nano-coating material for controlling the reaction environment.
In electrochemical reactions, which use electricity to drive chemical reactions and are used for hydrogen production or the manufacture of eco-friendly chemicals, performance is determined not only by the catalyst itself but also by the local reaction environment around the catalyst, such as acidity (pH) and ion distribution. However, conventional approaches have relied on special polymer coating materials, plastic-like materials made of long molecular chains, and have faced limitations in precisely designing internal structures at the nanometer scale.
To solve this problem, the research team focused on “single-stranded DNA,” DNA composed of a single strand. DNA carries a negative charge, meaning it can influence the movement of surrounding ions, atoms or molecules with electric charge, and it has the advantage that its length and base sequence can be freely designed. In particular, changing the base sequence allows the internal network structure of DNA to be precisely controlled, making it possible to create a customized nano-coating layer on the catalyst surface.
Category: Research
