Lookup NU author(s): Dr Terrence Liu,
Dr Eileen Yu,
Professor Keith Scott
This work is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0).
A core-shell-shell structure Pd-Y-Pt/C catalyst was prepared using a controlled surface reaction method. The structure was confirmed by X-ray photoelectron spectroscopy (XPS) and energy dispersive X-ray (EDX) techniques. Nano-scale yttrium was formed as a shell located as the middle layer of the catalyst. Electrochemical evaluation of the Pd-Y-Pt/C with less than 7% of Pt showed an improved performance toward oxygen reduction reaction (ORR) compared to Pt/C (20 wt.% Pt). Accelerated degradation tests (ADT) indicated that the addition of Y improved catalyst stability compared to Pt/C and Pd-Pt/C core-shell catalysts under various experimental conditions. This was due to the Y middle layer created approximate half-filled metal-metal d bond between Pt (or Pd) and Y. This catalyst utilized the core-shell-shell structure to minimize the Pt usage, and Y middle shell to improve stability. (C) 2014 The Authors. Published by Elsevier B.V.
Author(s): Liu XT, Yu EH, Scott K
Publication type: Article
Publication status: Published
Journal: Applied Catalysis B: Environmental
Print publication date: 01/01/2015
Online publication date: 29/07/2014
Acceptance date: 19/07/2014
Date deposited: 21/09/2015
ISSN (print): 0926-3373
ISSN (electronic): 1873-3883
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