KAIST Develops New Atomic Catalyst to Reduce Air Pollution

A research team at KAIST has introduced a groundbreaking atomic catalyst made of platinum and selenium, known as platinum selenaide. This material shows promising potential for high-efficiency carbon dioxide conversion and carbon monoxide reduction. By utilizing platinum atoms on the surface, the team achieved excellent carbon monoxide oxidation performance, surpassing traditional platinum catalyst forms. This innovative approach enhances catalytic reactions while using less platinum, leading to a more sustainable gas-phase catalyst technology.

Olofofo

Jul 22, 2025 - 12:32

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Platinum selenaide is a two-dimensional material formed by the layered combination of platinum (Pt) and selenium (Se). Its excellent crystallinity and precise control of interlayer interactions allow for modulation of various physical and chemical properties. Actively researched in fields like semiconductors, photodetectors, and electrochemical devices, a research team proposed a new design concept where atomic-level platinum on the surface of platinum selenaide acts as a catalyst for gas reactions. This showcases potential as a next-gen gas-phase catalyst for high-efficiency carbon dioxide conversion and carbon monoxide reduction.

KAIST announced a joint research success led by Professor Jeong Young Park, achieving excellent carbon monoxide oxidation using platinum atoms on the surface of platinum diselenide (PtSe₂). The catalyst design disperses platinum atoms on the surface for enhanced catalytic reactions, promoting active electronic interaction between platinum and selenium. The thin film of platinum diselenide demonstrated superior carbon monoxide oxidation performance compared to general platinum thin films.

Surface platinum atoms, due to 'selenium vacancies (Se-vacancy)', increased adsorption sites for gases, leading to enhanced catalytic reactions. Real-time analysis confirmed platinum atoms' role as adsorption sites during the reaction process. Computer simulations proved platinum diselenide's unique electron flow characteristics compared to general platinum.

Professor Jeong Young Park highlighted the research's design strategy using platinum diselenide for specialized gas reaction catalytic functions. The balanced adsorption of carbon monoxide and oxygen, along with higher reactivity across temperature ranges, improved practical applicability. This atomic-level design achieved a high-efficiency catalytic reaction mechanism.

The research was co-authored by Dr. Gyuho Han, Dr. Hyuk Choi, and Professor Jong Hun Kim, published in 'Nature Communications'. Supported by various programs and institutions, the research utilized advanced analysis equipment and collaboration with research facilities.