Insight into hydrothermal aging effect on Pd sites over Pd/LTA and Pd/SSZ-13 as PNA and CO oxidation monolith catalysts
Artikel i vetenskaplig tidskrift, 2020

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)]+.

PNA

Pd

SSZ-13

Hydrothermal aging

LTA

Författare

Aiyong Wang

Kompetenscentrum katalys (KCK)

Chalmers, Kemi och kemiteknik, Kemiteknik, Kemisk apparatteknik

Kristina Lindgren

Chalmers, Fysik, Mikrostrukturfysik

Mengqiao Di

Kompetenscentrum katalys (KCK)

Chalmers, Kemi och kemiteknik, Tillämpad kemi, Per-Anders Carlsson Group

Diana Bernin

Kompetenscentrum katalys (KCK)

Chalmers, Kemi och kemiteknik, Kemiteknik, Kemisk apparatteknik

Per-Anders Carlsson

Kompetenscentrum katalys (KCK)

Chalmers, Kemi och kemiteknik, Tillämpad kemi, Per-Anders Carlsson Group

Mattias Thuvander

Chalmers, Fysik, Mikrostrukturfysik

Louise Olsson

Kompetenscentrum katalys (KCK)

Chalmers, Kemi och kemiteknik, Kemiteknik

Applied Catalysis B: Environmental

0926-3373 (ISSN) 1873-3883 (eISSN)

Vol. 278 119315

Ny metodik för grundläggande kinetiska modeller i heterogenkatalys med hjälp av tvärvetenskapliga experiment

Vetenskapsrådet (VR), 2014-01-01 -- 2019-12-31.

Ämneskategorier

Oorganisk kemi

Analytisk kemi

Materialkemi

Styrkeområden

Transport

DOI

10.1016/j.apcatb.2020.119315

Mer information

Senast uppdaterat

2020-08-28