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Determination of Core–Shell Structures in Pd‐Hg Nanoparticles by STEM‐EDX
Author(s) -
Deiana Davide,
VerdaguerCasadevall Arnau,
Malacrida Paolo,
Stephens Ifan E. L.,
Chorkendorff Ib,
Wagner Jakob B.,
Hansen Thomas W.
Publication year - 2015
Publication title -
chemcatchem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.497
H-Index - 106
eISSN - 1867-3899
pISSN - 1867-3880
DOI - 10.1002/cctc.201500791
Subject(s) - scanning transmission electron microscopy , nanoparticle , transmission electron microscopy , electrocatalyst , alloy , high resolution transmission electron microscopy , shell (structure) , materials science , scanning electron microscope , oxygen , hydrogen peroxide , selectivity , chemistry , crystallography , inorganic chemistry , catalysis , nanotechnology , electrochemistry , metallurgy , electrode , organic chemistry , composite material
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 H 2 O 2 .