Highly Strained Au–Ag–Pd Alloy Nanowires for Boosted Electrooxidation of Biomass-Derived Alcohols,Nano Letters

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Highly Strained Au–Ag–Pd Alloy Nanowires for Boosted Electrooxidation of Biomass-Derived Alcohols
Nano Letters ( IF 9.6 ) Pub Date : 2021-01-15 , DOI: 10.1021/acs.nanolett.0c04395
Shumeng Zhang ₁ , Kai Liu ₁ , Zhaojun Liu ₁ , Moxuan Liu ₁ , Zhixue Zhang ₁ , Zhun Qiao ₁ , Liang Ming ₂ , Chuanbo Gao ₁

Affiliation

Although strain engineering is effective in boosting the activities of noble metal catalysts, it remains desirable to construct fully strained catalysts to push the activity to even higher levels. Herein, we report a novel route to strong lattice strains of a Pd-based catalyst by radial growth of a Pd-rich phase on Au–Ag alloy nanowires that are no thicker than 1.5 nm. It creates not only tensile strains in the Pd-rich sheath due to the core–sheath lattice mismatch but also distortion and twinning of the lattice, producing nonhomogeneous local strains as hotspots for the catalysis. Toward the electrochemical oxidation of biomass-derived alcohols including ethanol, ethylene glycol, and glycerol, the highly strained nanowires outperformed their less strained counterparts and reached up to 13.6, 18.2, and 11.1 A mg_Pd^–1, respectively. This strain engineering strategy may open new avenues to highly efficient catalysts for direct alcohol fuel cells and many other applications.

中文翻译：

高度应变的Au-Ag-Pd合金纳米线用于增强生物质衍生醇的电氧化作用

尽管应变工程可以有效地提高贵金属催化剂的活性，但是仍然需要构建完全应变的催化剂以将活性提高到更高的水平。在这里，我们报告了一种通过在不厚于1.5 nm的Au-Ag合金纳米线上径向生长富含Pd的相而获得Pd基催化剂强晶格应变的新途径的方法。它不仅会由于芯-鞘晶格失配而在富含Pd的鞘层中产生拉伸应变，而且还会导致晶格的扭曲和孪生，从而产生非均质的局部应变，作为催化热点。为了对生物质衍生的醇（包括乙醇，乙二醇和甘油）进行电化学氧化，高度应变的纳米线性能优于应变较小的纳米线，最高达到13.6、18.2和11.1 A mg _Pd分别为^–1。这种应变工程策略可能为直接醇燃料电池和许多其他应用的高效催化剂开辟新途径。

更新日期：2021-01-27

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