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Home»News»Creating nanoislands enhances platinum catalyst efficiency
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Creating nanoislands enhances platinum catalyst efficiency

February 7, 2025No Comments2 Mins Read
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Creating nanoislands enhances platinum catalyst efficiency
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Platinum is a useful as a catalyst for industrial chemistry. UC Davis researchers have developed a new technique to trap clusters of a few platinum atoms (white arrow on right) in nanometer-scale islands of cerium oxide (yellow circle) on a silica surface. The method could be used to produce more efficient and robust catalysts. Credit: Yizhen Chen, UC Davis

Noble metals such as platinum can make useful catalysts to accelerate chemical reactions, particularly hydrogenation (adding hydrogen atoms to a molecule). A research team led by Professor Bruce Gates at the UC Davis Department of Chemical Engineering is interested in making platinum catalysts that are highly efficient and stable during chemical reactions.

The team’s work is described in a paper published in Nature Chemical Engineering and in an accompanying research brief.

Previous work has shown that platinum arranged in clusters of a few atoms on a surface makes a better hydrogenation catalyst than either single platinum atoms, or larger nanoparticles of platinum. Unfortunately, such small clusters tend to clump easily into larger particles, losing efficiency.

Yizhen Chen, then a postdoctoral scholar in the Gates Catalysis Research Group, picked up on an idea by Jingyue Liu, now at Arizona State University, to “trap” platinum clusters on a tiny island of cerium oxide supported on a silica surface. Each island becomes its own chemical reactor.

Chen, Gates and colleagues were able to show that they could produce these clusters, that they showed good catalytic activity in hydrogenation of ethylene, and that they were stable under severe reaction conditions.

These confined metal clusters could provide a new route to produce stable catalysts for the chemical industry.


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