Fine-tuned local coordination environment of Pt single atoms on ceria controls catalytic reactivity

Wei Tan, Shaohua Xie, Duy Le, Weijian Diao, Meiyu Wang, Ke-Bin Low, Dave Austin, Sampyo Hong, Fei Gao, Lin Dong, Lu Ma, Steven N. Ehrlich, Talat S. Rahman and Fudong Liu ()
Additional contact information
Wei Tan: University of Central Florida
Shaohua Xie: University of Central Florida
Duy Le: University of Central Florida
Weijian Diao: Villanova University
Meiyu Wang: Nanjing University
Ke-Bin Low: BASF Corporation
Dave Austin: University of Central Florida
Sampyo Hong: Brewton-Parker College
Fei Gao: Nanjing University
Lin Dong: Nanjing University
Lu Ma: Brookhaven National Laboratory
Steven N. Ehrlich: Brookhaven National Laboratory
Talat S. Rahman: University of Central Florida
Fudong Liu: University of Central Florida

Nature Communications, 2022, vol. 13, issue 1, 1-16

Abstract: Abstract Constructing single atom catalysts with fine-tuned coordination environments can be a promising strategy to achieve satisfactory catalytic performance. Herein, via a simple calcination temperature-control strategy, CeO2 supported Pt single atom catalysts with precisely controlled coordination environments are successfully fabricated. The joint experimental and theoretical analysis reveals that the Pt single atoms on Pt1/CeO2 prepared at 550 °C (Pt/CeO2-550) are mainly located at the edge sites of CeO2 with a Pt–O coordination number of ca. 5, while those prepared at 800 °C (Pt/CeO2-800) are predominantly located at distorted Ce substitution sites on CeO2 terrace with a Pt–O coordination number of ca. 4. Pt/CeO2-550 and Pt/CeO2-800 with different Pt1-CeO2 coordination environments exhibit a reversal of activity trend in CO oxidation and NH3 oxidation due to their different privileges in reactants activation and H2O desorption, suggesting that the catalytic performance of Pt single atom catalysts in different target reactions can be maximized by optimizing their local coordination structures.

Date: 2022
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Persistent link: https://EconPapers.repec.org/RePEc:nat:natcom:v:13:y:2022:i:1:d:10.1038_s41467-022-34797-2

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DOI: 10.1038/s41467-022-34797-2

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