纳米棒
催化作用
材料科学
化学工程
晶体孪晶
乙二醇
极限抗拉强度
吸附
纳米技术
化学
复合材料
有机化学
微观结构
工程类
作者
Tukai Singha,S. S. Tomar,Sudip Chakraborty,Subhajit Das,Biswarup Satpati
出处
期刊:Small
[Wiley]
日期:2024-03-08
标识
DOI:10.1002/smll.202309736
摘要
Abstract The direct alcohol fuel cells (DAFCs) rely on alcohol oxidation reactions (AORs) to produce electricity, which require catalysts with optimized electronic structure to accelerate the sluggish AORs. Herein, an epitaxial growth of Pd layer onto the pentatwinned Au@Ag core–shell nanorods (NRs) is reported to synthesize highly strained Au@AgPd core–shell NRs. The tensile strain in the AgPd shell of the Au@AgPd nanorods (NRs) arises not only from the core–shell lattice mismatch but also from twinning and lattice distortion occurring at the five twinned boundaries present in the structure. Theoretical simulations prove that the presence of tensile strains in the AgPd layer leads to a significant upward shift of the d‐band center of the Pd site toward the Fermi level which remarkably changes the adsorption energy of alcohols on the surface. Highly strained Au@AgPd NRs show exceptional mass activities in electrochemical oxidation of biomass‐derived alcohols (ethylene glycol, ethanol, and glycerol) reaching up to 18.66, 15.6, and 7.90 A mg pd −1 , respectively. These values are 23.3, 23.6, and 23.2 times higher than commercial Pd/C catalysts. This strain engineering strategy set the platform for the design and synthesis of highly efficient and versatile catalysts for the construction of high‐performance DAFCs.
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