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)]+.

Pd

PNA

Hydrothermal aging

LTA

SSZ-13

Författare

Aiyong Wang

Chalmers, Kemi och kemiteknik, Kemiteknik, Kemisk apparat- och reaktionsteknik

Kompetenscentrum katalys (KCK)

Kristina Lindgren

Chalmers, Fysik, Mikrostrukturfysik

Mengqiao Di

Kompetenscentrum katalys (KCK)

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

Diana Bernin

Chalmers, Kemi och kemiteknik, Kemiteknik, Kemisk apparat- och reaktionsteknik

Kompetenscentrum katalys (KCK)

Per-Anders Carlsson

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

Kompetenscentrum katalys (KCK)

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

Infrastruktur

Chalmers materialanalyslaboratorium

DOI

10.1016/j.apcatb.2020.119315

Mer information

Senast uppdaterat

2021-02-19