Operando detection of single nanoparticle activity dynamics inside a model pore catalyst material

Sökning: L773:2375 2548 > Operando detection ...

Albinsson, David,1990Chalmers tekniska högskola,Chalmers University of Technology (författare)

Nanoconfinement in porous catalysts may induce reactant concentration gradients inside the pores due to local conversion. This leads to inefficient active material use since parts of the catalyst may be trapped in an inactive state. Experimentally, these effects remain unstudied due to material complexity and required high spatial resolution. Here, we have nanofabricated quasi-two-dimensional mimics of porous catalysts, which combine the traits of nanofluidics with single particle plasmonics and online mass spectrometry readout. Enabled by single particle resolution at operando conditions during CO oxidation over a Cu model catalyst, we directly visualize reactant concentration gradient formation due to conversion on single Cu nanoparticles inside the “model pore” and how it dynamically controls oxidation state-and, thus, activity-of particles downstream. Our results provide a general framework for single particle catalysis in the gas phase and highlight the importance of single particle approaches for the understanding of complex catalyst materials.

Bartling, Stephan,1985Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)bartling (författare)
Nilsson, Sara,1990Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)nisara (författare)
Ström, Henrik,1981Chalmers tekniska högskola,Chalmers University of Technology,Norges teknisk-naturvitenskapelige universitet (NTNU),Norwegian University of Science and Technology (NTNU)(Swepub:cth)k00sthe (författare)
Fritzsche, Joachim,1977Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)joafri (författare)
Langhammer, Christoph,1978Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)clangham (författare)
Chalmers tekniska högskolaNorges teknisk-naturvitenskapelige universitet (NTNU) (creator_code:org_t)

Ingår i:Science advances: American Association for the Advancement of Science (AAAS)6:252375-2548

Av författaren/redakt...: Albinsson, David ...; Bartling, Stepha ...; Nilsson, Sara, 1 ...; Ström, Henrik, 1 ...; Fritzsche, Joach ...; Langhammer, Chri ...

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