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Joo, Sang Hoon
Nanomaterials & Catalysis Lab
Research Interests
  • Catalyst, energy conversion, fuel cells, electrolyzer, ORR, HER, OER

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Control of the surface atomic population of Rh<inf>0.5</inf>Pd<inf>0.5</inf> bimetallic nanoparticles supported on CeO<inf>2</inf>

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Title
Control of the surface atomic population of Rh0.5</inf>Pd0.5</inf> bimetallic nanoparticles supported on CeO2</inf>
Author
Bernardi, FabianoGrass, Michael E.Hong, Young P.Chang, RuiJabeen, NailaZhang, ChunjuanEichhorn, Bryan W.Seo, BoraAlayoglu, SelimHussain, ZahidJoo, Sang HoonLiu, Zhi
Issue Date
2016-02
Publisher
ELSEVIER SCIENCE BV
Citation
CATALYSIS TODAY, v.260, pp.95 - 99
Abstract
Rh0.5Pd0.5/CeO2 bimetallic nanoparticles were subjected to reducing and oxidizing atmospheres at different temperatures and characterized by means of the Ambient Pressure X-Ray Photoelectron Spectroscopy (AP-XPS). The surface atomic population is calculated for all cases. By using a high temperature pretreatment at 480 degrees C in H-2 atmosphere, it was possible to control the surface atomic population with Pd atoms frozen at the skin layer even in an oxidizing atmosphere, which is not observed without high temperature pre-treatment (Rh atoms at the skin layer). The change of the Rh/Pd surface segregation behavior after the high temperature pre-treatment is attributed to the geometrical factor of Strong Metal Support Interaction (SMSI) effect, i.e., the occurrence of the ceria capping layer around nanoparticles.
URI
https://scholarworks.unist.ac.kr/handle/201301/16647
URL
http://www.sciencedirect.com/science/article/pii/S0920586115003910
DOI
10.1016/j.cattod.2015.06.024
ISSN
0920-5861
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CHM_Journal Papers
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