纳米颗粒
过氧化氢
选择性
催化作用
壳体(结构)
渗透(战争)
化学工程
材料科学
氧化物
纳米技术
纳米结构
化学
复合材料
冶金
有机化学
工程类
运筹学
作者
Xiangyun Xiao,Seok-Ho Lee,Kwan-Young Lee,Kyong Ryol Tag,Jae-Pyoung Ahn,Hong‐Kyu Kim,Kwan-young Lee,Taekyung Yu
标识
DOI:10.1016/j.jiec.2023.02.029
摘要
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 H2 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 H2 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.
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