Chinesische Forscher entwickeln ein schnelles und präzises Verfahren zur Synthese von Katalysatoren der Platingruppe

A research team from Tianjin University has published new findings in the journal "Science," introducing a millisecond-level thermal impulse technology that enables the ultra-fast synthesis and precise control of platinum-group catalysts. The work, titled "Transient assembly of precision-tuned platinum-skin intermetallic catalysts for fuel cells," proposes a "transient assembly" strategy for creating platinum-group metal core-shell catalysts, opening a new avenue for improving the performance of hydrogen fuel cells and advancing environmentally friendly energy technologies. Platinum-group catalysts play a crucial role in modern energy, chemical, and environmental industries. The efficient and precise fabrication of core-shell structures made of platinum-group and non-precious metals is critical to achieving both high catalytic activity and reduced use of precious metals. Traditional synthesis methods typically rely on prolonged high-temperature annealing processes, which are often time-consuming, energy-intensive, and difficult to control precisely. To address these challenges, the Tianjin University team, along with its collaborators, developed a non-equilibrium transient assembly strategy. Through periodic thermal impulses, the process delivers energy with millisecond-level precision, causing nanocrystals to self-assemble into core-shell structures via the continuous evolution of high-energy transient configurations. Furthermore, it allows for atomic-level precise control over the thickness of the platinum shell. According to the study, the new approach can reduce a conventional, multi-step process that normally takes...