Copper catalysis at operando conditions - bridging the gap between single nanoparticle probing and catalyst-bed-averaging
Artikel i vetenskaplig tidskrift, 2020

In catalysis, nanoparticles enable chemical transformations and their structural and chemical fingerprints control activity. To develop understanding of such fingerprints, methods studying catalysts at realistic conditions have proven instrumental. Normally, these methods either probe the catalyst bed with low spatial resolution, thereby averaging out single particle characteristics, or probe an extremely small fraction only, thereby effectively ignoring most of the catalyst. Here, we bridge the gap between these two extremes by introducing highly multiplexed single particle plasmonic nanoimaging of model catalyst beds comprising 1000 nanoparticles, which are integrated in a nanoreactor platform that enables online mass spectroscopy activity measurements. Using the example of CO oxidation over Cu, we reveal how highly local spatial variations in catalyst state dynamics are responsible for contradicting information about catalyst active phase found in the literature, and identify that both surface and bulk oxidation state of a Cu nanoparticle catalyst dynamically mediate its activity.

Författare

David Albinsson

Chalmers, Fysik, Kemisk fysik

Astrid Boje

Chalmers, Fysik, Kemisk fysik

Sara Nilsson

Chalmers, Fysik, Kemisk fysik

Christopher Tiburski

Chalmers, Fysik, Kemisk fysik

Anders Hellman

Chalmers, Fysik, Kemisk fysik

Kompetenscentrum katalys (KCK)

Henrik Ström

Chalmers, Mekanik och maritima vetenskaper, Strömningslära

Christoph Langhammer

Chalmers, Fysik, Kemisk fysik

Nature Communications

2041-1723 (ISSN)

Vol. 11 1 4832

Single Nanoparticle Catalysis, SINCAT

Europeiska kommissionen (EU), 2016-01-01 -- 2020-12-31.

Single Particle Catalysis in Nanoreactors (SPCN)

Knut och Alice Wallenbergs Stiftelse, 2016-01-01 -- 2020-12-31.

Styrkeområden

Nanovetenskap och nanoteknik (SO 2010-2017, EI 2018-)

Ämneskategorier

Fysikalisk kemi

Materialkemi

Nanoteknik

Den kondenserade materiens fysik

Infrastruktur

Chalmers materialanalyslaboratorium

Nanotekniklaboratoriet

DOI

10.1038/s41467-020-18623-1

Mer information

Senast uppdaterat

2020-10-12