Single-atom Zr promoter boosts oxygen activation on ceria-supported Pt catalysts.
basic_science · Level V
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- Record sourced from PubMed, PMID 40774946.
- Also identified by DOI 10.1038/s41467-025-62447-w and PMC identifier 12332069.
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Abstract
Activation of surface lattice oxygen and chemisorbed oxygen on catalyst surfaces constitutes a pivotal step in heterogeneous oxidative catalysis. Herein, we report a strategy for enhancing oxygen activation by rational design of catalysts with single-atom promoters. Single-site Zr species in CeO<sub>2</sub> (Zr<sub>1</sub>-CeO<sub>2</sub>) are synthesized using the atom-trapping method. The Zr<sub>1</sub>-CeO<sub>2</sub>-supported Pt catalyst exhibits enhanced catalytic performance over the CeO<sub>2</sub>-supported Pt catalyst in the oxidation of CO, C<sub>3</sub>H<sub>8</sub>, and C<sub>3</sub>H<sub>6</sub>, achieving significantly lower T<sub>50</sub> values (temperature required to reach 50% conversion). This enhanced catalytic activity is attributed to the formation of an asymmetric Zr<sub>1</sub>-O-Pt<sub>1</sub> structure, which favors the activation of the adjacent surface lattice oxygen and chemisorbed molecular oxygen. This work exemplifies that incorporating single-site atoms into oxide support facilitates oxygen activation, providing new insights into the role of atomically dispersed promoters in heterogeneous catalysis.