Insight into hydrothermal aging effect on Pd sites over Pd/LTA and Pd/SSZ-13 as PNA and CO oxidation monolith catalysts

Wang, Aiyong, 1989 (författare): Chalmers tekniska högskola,Chalmers University of Technology

Lindgren, Kristina, 1989 (författare): Chalmers tekniska högskola,Chalmers University of Technology

Di, Mengqiao, 1994 (författare): Chalmers tekniska högskola,Chalmers University of Technology

Bernin, Diana, 1979 (författare): Chalmers tekniska högskola,Chalmers University of Technology

Carlsson, Per-Anders, 1972 (författare): Chalmers tekniska högskola,Chalmers University of Technology

Thuvander, Mattias, 1968 (författare): Chalmers tekniska högskola,Chalmers University of Technology

Olsson, Louise, 1974 (författare): Chalmers tekniska högskola,Chalmers University of Technology

(creator_code:org_t)

Elsevier BV, 2020
2020
Engelska.
Ingår i: Applied Catalysis B: Environmental. - : Elsevier BV. - 0926-3373 .- 1873-3883. ; 278

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Abstract Ämnesord

Stäng

In this study, Pd/LTA and Pd/SSZ-13 were prepared and then hydrothermally aged at the temperature of 750, 800, 850, and 900 °C. Multiple Pd species, including isolated Pd ions (Pd2+ and [Pd(OH)]+) and 1∼2 nm PdOx nanoparticles, were presented in two fresh samples. The Pd/LTA sample showed remarkable hydrothermal stability, but the Pd/SSZ-13 sample experienced severe damage after aging at 900 °C. The destruction of the aged Pd/SSZ-13 sample led to the migration and sintering of PdOx nanoparticles, which formed bulk PdOx particles on the surface of the zeolite crystallite. A large number of PdOx nanoparticles were retained after aging of the Pd/LTA sample. Pd/LTA contained a higher concentration of Pd2+ sites, while Pd/SSZ-13 had more [Pd(OH)]+ sites. It is found that the improvement of NO adsorption ability with CO addition onto Pd2+ was more significant than onto [Pd(OH)]+.

Av författaren/redakt...: Wang, Aiyong, 19 ...; Lindgren, Kristi ...; Di, Mengqiao, 19 ...; Bernin, Diana, 1 ...; Carlsson, Per-An ...; Thuvander, Matti ...; visa fler...; Olsson, Louise, ...; visa färre...

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