title: Quantitative Energy-Dispersive X-Ray Analysis of Catalyst Nanoparticles Using a Partial Cross Section Approach.
abstract: The new generation of energy-dispersive X-ray (EDX) detectors with higher count rates than ever before, paves the way for a new approach to quantitative elemental analysis in the scanning transmission electron microscope. Here we demonstrate a method of calculating partial cross sections for use in quantifying EDX data, beneficial especially because of the simplicity of its implementation. Applying this approach to acid-leached PtCo catalyst nanoparticles leads to quantitative determination of the Pt surface enrichment.
authors.affiliation: 1Department of Materials,University of Oxford,Parks Road,Oxford OX1 3PH,UK.
authors.forename: Katherine E
authors.initials: KE
authors.lastname: MacArthur
authors.affiliation: 2Materials Science Centre,University of Manchester,Manchester M13 9PL,UK.
authors.forename: Thomas J A
authors.initials: TJ
authors.lastname: Slater
authors.affiliation: 2Materials Science Centre,University of Manchester,Manchester M13 9PL,UK.
authors.forename: Sarah J
authors.initials: SJ
authors.lastname: Haigh
authors.affiliation: 3Johnson Matthey Technology Centre,Blounts Court Road,Sonning Common,Reading RG4 9NH,Reading,UK.
authors.forename: Dogan
authors.initials: D
authors.lastname: Ozkaya
authors.affiliation: 1Department of Materials,University of Oxford,Parks Road,Oxford OX1 3PH,UK.
authors.forename: Peter D
authors.initials: PD
authors.lastname: Nellist
authors.affiliation: 1Department of Materials,University of Oxford,Parks Road,Oxford OX1 3PH,UK.
authors.forename: Sergio
authors.initials: S
authors.lastname: Lozano-Perez
mesh_terms: D003035:Cobalt / Q000032:analysis*; D017348:Microscopy, Electron, Scanning Transmission / Q000379:methods*; D053758:Nanoparticles / Q000737:chemistry*; D010984:Platinum / Q000032:analysis*; D013052:Spectrometry, X-Ray Emission / Q000379:methods*
chemical_list: D003035:Cobalt; D010984:Platinum
keywords: catalysts; partial cross section; quantitative EDX