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首页> 外文期刊>Journal of Materials Chemistry, A. Materials for energy and sustainability >Rational syntheses of core-shell Fe@(PtRu) nanoparticle electrocatalysts for the methanol oxidation reaction with complete suppression of CO-poisoning and highly enhanced activity
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Rational syntheses of core-shell Fe@(PtRu) nanoparticle electrocatalysts for the methanol oxidation reaction with complete suppression of CO-poisoning and highly enhanced activity

机译：合理合成用于甲醇氧化反应的核壳型Fe @（PtRu）纳米粒子电催化剂，同时完全抑制CO中毒并大大增强活性

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摘要

We report the syntheses of ternary nanoparticles (NPs) of Fe-x@(PtRu)((1-x)/2) (x = 0.0, 0.30, 0.34, 0.38, and 0.44) with Fe cores and PtRu alloy shells, which exhibit greatly improved electrocatalytic properties for the methanol oxidation reaction (MOR). The syntheses were achieved by one-step sonochemical treatments of Pt(acac)(2), Ru(acac)(3), and Fe(acac)(3) in ethylene glycol. The NPs are characterized by X-ray diffractometry, transmission electron microscopy (TEM), and inductively coupled plasma-adsorption emission spectroscopy for the particle size, morphology, and composition, respectively. The formation of core-shell NPs has been proven by scanning TEM-energy dispersive X-ray spectroscopy, and the electronic structures of the elements have been investigated by X-ray photoelectron spectroscopy and X-ray adsorption near edge spectroscopy. The ternary NPs show enhanced MOR electrocatalytic activity compared to a commercial PtRu-alloy (PtRu) by a factor of up to 2.5 based on the forward current density data. More importantly, the ternary NPs show complete suppression of CO-poisoning. Chronoamperometry data for MOR on the ternary NPs show improved stability over Pt/C and PtRu references.
机译：我们报道了具有Fe核和PtRu合金壳的Fe-x @（PtRu）（（1-x）/ 2）（x = 0.0、0.30、0.34、0.38和0.44）三元纳米颗粒（NPs）的合成，甲醇氧化反应（MOR）的电催化性能大大提高。通过一步法在乙二醇中对Pt（acac）（2），Ru（acac）（3）和Fe（acac）（3）进行声化学处理来完成合成。 NP的特征分别是X射线衍射，透射电子显微镜（TEM）和电感耦合等离子体吸附发射光谱，分别用于粒度，形态和组成。核壳纳米粒子的形成已通过扫描TEM能量色散X射线光谱法得到证实，并且元素的电子结构已通过X射线光电子能谱和X射线近边缘吸收法研究。与正向电流密度数据相比，与商用PtRu合金（PtRu）相比，三元NPs显示出增强的MOR电催化活性。更重要的是，三元NPs完全抑制了CO中毒。三元NP上MOR的计时电流法数据显示，与Pt / C和PtRu参考相比，稳定性得到改善。

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