Coherent Bragg imaging of 60 nm Au nanoparticles under electrochemical control at the NanoMAX beamline

Björling, AlexanderLund University,Lunds universitet,MAX IV-laboratoriet,MAX IV Laboratory (författare)

Nanoparticles are essential electrocatalysts in chemical production, water treatment and energy conversion, but engineering efficient and specific catalysts requires understanding complex structure-reactivity relations. Recent experiments have shown that Bragg coherent diffraction imaging might be a powerful tool in this regard. The technique provides three-dimensional lattice strain fields from which surface reactivity maps can be inferred. However, all experiments published so far have investigated particles an order of magnitude larger than those used in practical applications. Studying smaller particles quickly becomes demanding as the diffracted intensity falls. Here, in situ nanodiffraction data from 60 nm Au nanoparticles under electrochemical control collected at the hard X-ray nanoprobe beamline of MAX IV, NanoMAX, are presented. Two-dimensional image reconstructions of these particles are produced, and it is estimated that NanoMAX, which is now open for general users, has the requisites for three-dimensional imaging of particles of a size relevant for catalytic applications. This represents the first demonstration of coherent X-ray diffraction experiments performed at a diffraction-limited storage ring, and illustrates the importance of these new sources for experiments where coherence properties become crucial.

Carbone, DinaLund University,Lunds universitet,MAX IV-laboratoriet,MAX IV Laboratory(Swepub:lu)maxl-grc (författare)
Sarabia, Francisco J.University of Alicante (författare)
Hammarberg, SusannaLund University,Lunds universitet,NanoLund: Centre for Nanoscience,Annan verksamhet, LTH,Lunds Tekniska Högskola,Synkrotronljusfysik,Fysiska institutionen,Institutioner vid LTH,Other operations, LTH,Faculty of Engineering, LTH,Synchrotron Radiation Research,Department of Physics,Departments at LTH,Faculty of Engineering, LTH(Swepub:lu)su4748ha (författare)
Feliu, Juan M.University of Alicante (författare)
Solla-Gullón, JoséUniversity of Alicante (författare)
Lunds universitetMAX IV-laboratoriet (creator_code:org_t)

Av författaren/redakt...: Björling, Alexan ...; Carbone, Dina; Sarabia, Francis ...; Hammarberg, Susa ...; Feliu, Juan M.; Solla-Gullón, Jo ...

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