A "Precise" Future for Chemistry: Engineering Electron Quantum States for Precision Catalysis.

Abstract

Precision chemistry enables control over catalytic processes at the subatomic level by engineering electron quantum states. This review centers on two principal strategies of precision catalysis. Orbital catalysis tunes orbital hybridization between catalysts and reactants, while spin catalysis aligns electron spin states to direct reaction pathways. The underlying quantum principles, catalyst design, in situ characterization, and machine-learning-assisted optimization are systematically examined. Representative reactions, including CO2 reduction, oxygen evolution, hydrogen evolution, and nitrate reduction, serve as benchmarks to compare orbital and spin catalysts with conventional systems through selectivity, Faradaic efficiency, and turnover frequency. The trade-offs among orbital energy alignment, spin-state matching, and practical scalability are analyzed. The application of machine learning for real-time monitoring of oxidation and spin states during catalysis is also discussed. Electronic-level precision catalysis, by delivering high selectivity and high performance, offers a route toward low-waste and efficient chemical manufacturing.