Designing Novel Green Photocatalytic Materials for Artificial Photosynthesis through the Integration of Chirality and Spin Effects
2025/12/8
The research team led by Distinguished Professor Chun-Wei Chen of the Department of Materials Science and Engineering and the International Graduate Program of Molecular Science and Technology (NTU-MST) at National Taiwan University has successfully developed chiral perovskite photocatalytic materials that integrate chirality and electron spin effects for artificial photosynthesis. By harnessing solar energy, these photocatalysts enable efficient conversion of carbon dioxide into value-added fuels, opening new research directions in solar-to-fuel energy conversion.
The team introduced chiral molecules into perovskite crystals to construct materials with well-defined left-handed and right-handed chiral structures. They discovered that this structural chirality strongly influences the behavior of photoexcited electrons and holes, thereby enhancing reaction selectivity and improving photocatalytic efficiency. This work not only expands the application potential of perovskite materials in photocatalysis and energy conversion but also establishes a new research direction in chiral optoelectronic materials, offering innovative design strategies for future solar energy conversion and green chemistry.
More importantly, the study reveals the critical role of spin polarization in photocatalysis and energy conversion processes, providing a new pathway to regulate chemical reactions through spin-dependent mechanisms. By combining chirality-induced spin polarization with modulation of an external magnetic field, the photocatalytic CO₂ reduction efficiency can be significantly enhanced. These findings demonstrate the synergistic interplay among structure, chirality, spin polarization, and charge-carrier dynamics, highlighting the promise of chiral perovskite nanocrystals for advanced solar-to-fuel conversion applications.
This research achievement was recently published in the flagship journal of the American Chemical Society, Journal of the American Chemical Society (JACS), and selected as the issue’s cover article.
In recent years, Professor Chen’s research group has focused on the role of spin electrons in catalytic energy conversion. Since first proposing the novel concept of enhancing photocatalytic performance by increasing spin polarization through magnetic element doping in 2022, the team has pioneered a new research direction in spin-regulated catalysis. Subsequently, several innovative strategies utilizing spin-polarized electrons to improve catalytic conversion efficiency have been reported. Including the present work, the group has published four related papers in JACS over the past three years, underscoring the importance of spin effects in energy-related catalytic reactions.
This collaborative research was conducted jointly by National Taiwan University, National Taiwan Normal University, the National Synchrotron Radiation Research Center, National Pingtung University, and National Yang Ming Chiao Tung University. The work was supported by the National Science and Technology Council and the Ministry of Education’s Higher Education Sprout Project through the Center of Atomic Initiative for New Materials (AI-Mat), National Taiwan University.
The full text of the research article is available at: https://pubs.acs.org/doi/full/10.1021/jacs.5c11357