Three Dimensional PtRh Alloy Porous Nanostructures: Tuning the Atomic Composition and Controlling the Morphology for the Application of Direct Methanol Fuel Cells

Three Dimensional PtRh Alloy Porous Nanostructures: Tuning the Atomic Composition and Controlling the Morphology for the Application of Direct Methanol Fuel Cells
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三维PtRh合金多孔纳米结构:调整原子组成和控制形态以应用于直接甲醇燃料电池

DOI:
10.1002/adfm.201200678
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发表时间:
2012-06
影响因子:
19
通讯作者:
Liu, Chung-Chiun
Liu, Chung-Chiun
中科院分区:
材料科学1区
文献类型:
--
作者:
Zhang, Yuan;Janyasupab, Metini;Liu, Chen-Wei;Li, Xinxin;Xu, Jiaqiang;Liu, Chung-Chiun

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提出了一种通过控制纳米粒子在油胺中的聚集来合成PtRh合金三维多孔纳米结构的策略。通过改变适应甲醇氧化的前体盐的浓度来调节两种组分(Pt和Rh)之间的原子比。PtRh合金纳米结构的形态通过将反应体系的温度升高至240 °C来控制。与商业Pt/C(E-TEK)和PtRh纳米颗粒相比,所制备的3D多孔纳米结构提供了高度的电化学活性和对甲醇氧化反应的良好耐久性。因此,3D合金多孔纳米结构提供了一个很好的机会,探索其对甲醇氧化的催化性能。
A strategy for the synthesis of PtRh alloy 3D porous nanostructures by controlled aggregation of nanoparticles in oleylamine is presented. The atomic ratio between the two components (Pt and Rh) is tuned by varying the concentration of precursor salts accommodating the oxidation of methanol. The morphology of PtRh alloy nanostructure is controlled by elevating the temperature of the reaction system to 240 °C. The prepared 3D porous nanostructures provide a high degree of electrochemical activity and good durability toward the methanol oxidation reaction compared to those of the commercial Pt/C (E‐TEK) and PtRh nanoparticles. Therefore, the 3D alloy porous nanostructures provide a good opportunity to explore their catalytic properties for methanol oxidation.
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