化学
纳米线
催化作用
拉伸应变
等离子体子
拉伤
格子(音乐)
极限抗拉强度
纳米技术
纳米颗粒
化学工程
光电子学
复合材料
有机化学
物理
医学
材料科学
声学
内科学
工程类
作者
Haosheng Liang,Xiao Tong,Yuanyuan Min,Yingying Wang,Xiaohu Wu,Yiqun Zheng
标识
DOI:10.1021/acs.inorgchem.4c03632
摘要
The synthesis of bimetallic nanocatalysts with strained crystal lattices has attracted considerable interest. This is because, beyond the electronic structure modifications realized through elemental doping, the strain effect offers an extra mechanism to fine-tune the electronic structures, thereby possibly improving the catalytic performances. We present a method for constructing defective AuPd@Pd short nanowires, achieved through a controlled galvanic replacement reaction between short AuCu nanowires and Pd precursors. Advanced structural analyses using spherical aberration-corrected transmission electron microscopy (AC-TEM) validated the expanded crystal lattice on the nanowire surface and also demonstrated pronounced plasmonic absorption in the UV-vis region. Leveraging both plasmonic absorption and strain effects, the AuPd@Pd short nanowires displayed a higher apparent rate constant compared to Pd nanoparticles. Integrating molecular dynamic simulations with density functional theory calculations revealed that the tensile strain on AuPd@Pd short nanowires benefited the catalytic activity by elevating the d-band center, thereby intensifying the adsorption of
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