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Effect of structure of Pd@Fe core-shell cubes on the enhancement of H-2 conversion in direct reaction of H-2 and O-2

Authors
Xiao, XiangyunLee, Seok-HoHan, Geun-HoTag, Kyong RyolAhn, Jae PyoungKim, Hong-KyuLee, Kwan-youngYu, Taekyung
Issue Date
25-Jun-2023
Publisher
ELSEVIER SCIENCE INC
Keywords
Core@shell; Structure effect; Interface; H-2 conversion; Magnetic separation
Citation
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY, v.122, pp 285 - 291
Pages
7
Indexed
SCIE
SCOPUS
KCI
Journal Title
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
Volume
122
Start Page
285
End Page
291
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/185580
DOI
10.1016/j.jiec.2023.02.029
ISSN
1226-086X
1876-794X
Abstract
Structure engineering is an integrated strategy to regulate the performance of nanoparticles for various catalytic reactions, since the nanoparticle composition, shape, and interface affect the reaction activity and selectivity. Herein, we report a simple synthesis of clear core-shell structured Pd@Fe nanocubes with different shell thicknesses, which exhibit higher H-2 conversion efficiency in direct hydrogen peroxide generation compared with ordinary Pd cubes. This result can be attributed to two main reasons: (i) the conformal growth of the Fe oxide shell consisting of loose structured Fe3O4 favors H-2 penetration, and (ii) the capping agent (Br-) on the Pd-Fe3O4 interface that blocks the Pd active sites is removed during the shell formation. Therefore, the Fe oxide shell of the Pd@Fe nanoparticles not only helps maintaining the morphology of the nanoparticles but also increases the number of active sites on the inner core surface, confirming the advantage of the core-shell structure. (c) 2023 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.
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