by Riko Seibo
Tokyo, Japan (SPX) Dec 04, 2025
Researchers on the Korea Institute of Vitality Analysis report a carbon monoxide pushed course of that types metallic skinny movies about 0.3 nanometers thick, enabling sooner fabrication of core-shell gasoline cell catalysts that cut back platinum utilization whereas sustaining efficiency. The method, referred to as CO Adsorption-Induced Deposition, leverages the redox habits and robust floor affinity of carbon monoxide to deposit atomically managed platinum shells on low value metallic cores with out extra decreasing brokers or electrochemical methods.
Core-shell catalysts place a skinny platinum shell over a special metallic core to realize excessive oxygen discount response exercise with much less platinum, bettering gasoline cell economics. The brand new course of adsorbs a single molecular layer of CO on the core floor after which selectively reduces platinum onto that layer to regulate shell thickness at roughly 0.3 nanometers.
The tactic reduces processing time to half-hour to 2 hours at kilogram scale, in contrast with greater than 24 hours for typical copper underpotential deposition routes that require tight voltage management and oxide removing steps. By avoiding these steps, CO AID simplifies manufacturing whereas retaining atomic layer precision wanted for prime efficiency shells.
Utilizing CO AID, the crew coated platinum onto palladium, gold, and iridium cores. A palladium primarily based platinum core-shell catalyst achieved about double the oxygen discount response exercise and 1.5 occasions the sturdiness in contrast with industrial platinum on carbon benchmarks. The work was carried out with Brookhaven Nationwide Laboratory and printed on Nov 7, 2025 in ACS Nano, with assist from the Ministry of Science and ICT.
Lead researcher Gu-Gon Park mentioned, “This work originated from the thought of changing carbon monoxide’s toxicity right into a device for nanoscale thin-film management. By permitting supplies to be exactly engineered on the atomic stage and drastically decreasing processing time, the know-how presents a brand new synthesis paradigm with wonderful prospects for commercialization.”
Workforce member Yongmin Kwon added, “With the ability to manipulate the surfaces of metallic nanoparticles on the atomic-layer scale utilizing one thing so simple as carbon monoxide means this know-how may have far-reaching implications-not just for fuel-cell catalyst manufacturing, but additionally for advancing nanoparticle manufacturing in areas equivalent to semiconductors and thin-film supplies.”
Analysis Report:CO Adsorption-Induced Depositon: A Facile and Exact Synthesis Route for Core-Shell Catalysts
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South Korea Nationwide Analysis Council of Science and Expertise
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