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

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Title: Coherent Bragg imaging of 60 nm Au nanoparticles under electrochemical control at the NanoMAX beamline
Authors: Björling, Alexander | Carbone, Dina | Sarabia, Francisco J. | Hammarberg, Susanna | Feliu, Juan M. | Solla-Gullón, José
Research Group/s: Electroquímica de Superficies | Electroquímica Aplicada y Electrocatálisis
Center, Department or Service: Universidad de Alicante. Departamento de Química Física | Universidad de Alicante. Instituto Universitario de Electroquímica
Keywords: Coherent diffraction imaging | Nanodiffraction | Electrocatalysis
Knowledge Area: Química Física
Issue Date: 2019
Publisher: International Union of Crystallography
Citation: Journal of Synchrotron Radiation. 2019, 26: 1830-1834. doi:10.1107/S1600577519010385
Abstract: 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.
Sponsor: This work was supported by the AForsk Foundation through grant 17-408. JS-G acknowledges financial support from VITC (Vicerrectorado de Investigación y Transferencia de Conocimiento) of the University of Alicante (UATALENTO16-02). The MAX IV Laboratory receives funding through the Swedish Research Council under grant no 2013-02235.
ISSN: 0909-0495 (Print) | 1600-5775 (Online)
DOI: 10.1107/S1600577519010385
Language: eng
Type: info:eu-repo/semantics/article
Rights: Creative Commons Attribution (CC-BY) Licence
Peer Review: si
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