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Atomic Resolution Chemical Mapping of Platinum-Cobalt Nanoparticles Using Scanning Transmission Electron Microscopy-Electron Energy Loss Spectroscopy

Year: 2026

Type: article

Abstract: Scanning transmission electron microscopy-electron energy loss spectroscopy (STEM-EELS) is a powerful quantitative technique for catalyst characterisation that allows composition to be studied at high spatial resolution. Collection of EELS signal on charge-coupled device (CCD) detectors has limited the technique’s utility at higher energy losses due to high readout noise masking the low signal. New direct electron detectors (DEDs) for EELS remove the problem of readout noise and allow for reliable signals to be detected for more elements. We show data collected on platinum-cobalt nanoparticles with a direct electron EELS detector which allows for atomic resolution chemical mapping of platinum and cobalt.

Source: Johnson Matthey Technology Review

DOI: 10.1595/205651326x17712413760074

Authors: A. C. Zanre, A. Varambhia, D. Ozkaya, R. J. Nicholls, S. Lozano-Perez, P. D. Nellist

Institutions: University of Oxford, Diamond Light Source, Johnson Matthey (United Kingdom)

Language: English

Topic: Advanced Electron Microscopy Techniques and Applications

Subfield: Structural Biology

Field: Biochemistry, Genetics and Molecular Biology

Domain: Life Sciences

Open Access status: diamond

OpenAlex ID: W7129046246

FWCI:

Cites: 25

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