Determination of Core–Shell Structures in Pd‐Hg Nanoparticles by STEM‐EDX1. Issue 22 (16th October 2015)

• Record Type: Journal Article
• Authors: Deiana, Davide; Verdaguer‐Casadevall, Arnau; Malacrida, Paolo; Stephens, Ifan E. L.; Chorkendorff, Ib; Wagner, Jakob B.; Hansen, Thomas W.
• Is Part Of: ChemCatChem. Volume 7:Issue 22(2015:Nov.)
• Page Start: 3748
• Page End: 3752
• Publication Date: 2015-10-16
• Subjects: alloys -- electron microscopy -- oxygen reduction reaction -- Pd-Hg core–shell nanoparticle -- scanning transmission electron microscopy; Catalysis -- Periodicals; 541.39505
• DOI: 10.1002/cctc.201500791
• Languages: English
• ISSNs: 1867-3880

Abstract

Abstract: The structural and elemental configuration of a high‐performing Pd‐Hg electrocatalyst for oxygen reduction to hydrogen peroxide has been studied by means of high‐resolution scanning transmission electron microscopy. Pd‐Hg nanoparticles are shown to have a crystalline core–shell structure, with a Pd core and a Pd‐Hg ordered alloy shell. The ordered shell is responsible for the high oxygen reduction selectivity to H2 O2 . Abstract : The power of microscopy : The atomic structure of the alloyed Pd‐Hg alloy responsible for highly selective oxygen reductions reaction is studied by using high‐resolution scanning transmission electron microscopy (STEM). The alloy is found as a shell around Pd nanoparticles supported on carbon.