title: Electrochemical synthesis of core-shell catalysts for electrocatalytic applications.
abstract: A novel electrochemical method to prepare platinum shells around carbon-supported metal nanoparticles (Ru and Au) by pulsed electrodeposition from solutions containing Pt ions is presented. Shell formation is confirmed by characteristic changes in the cyclic voltammograms, and is further evidenced by monitoring particle growth by transmission electron microscopy as well as by energy-dispersive analysis of X rays (EDX). Scanning electrochemical microscopy and EDX measurements indicate a selective Pt deposition on the metal/carbon catalyst, but not on the glassy carbon substrate. The thus prepared carbon-supported core-shell nanoparticles are investigated with regard to their activity in electrocatalytic oxygen reduction, which demonstrates the applicability of these materials in electrocatalysis or sensors.
authors.affiliation: Analytische Chemie-Elektroanalytik & Sensorik, Ruhr-Universität Bochum, 4780 Bochum, Germany.
authors.forename: Christian
authors.initials: C
authors.lastname: Kulp
authors.forename: Xingxing
authors.initials: X
authors.lastname: Chen
authors.forename: Andrea
authors.initials: A
authors.lastname: Puschhof
authors.forename: Stefanie
authors.initials: S
authors.lastname: Schwamborn
authors.forename: Christoph
authors.initials: C
authors.lastname: Somsen
authors.forename: Wolfgang
authors.initials: W
authors.lastname: Schuhmann
authors.forename: Michael
authors.initials: M
authors.lastname: Bron
mesh_terms: D002244:Carbon / Q000737:chemistry; D002384:Catalysis; D004563:Electrochemistry; D004566:Electrodes; D006046:Gold / Q000737:chemistry*; D053768:Metal Nanoparticles / Q000737:chemistry*; D010316:Particle Size; D010984:Platinum / Q000737:chemistry*; D012428:Ruthenium / Q000737:chemistry*; D013499:Surface Properties
chemical_list: D010984:Platinum; D002244:Carbon; D006046:Gold; D012428:Ruthenium