Special microwave-assisted one-pot synthesis of low loading Pt- Ru alloy nanoparticles on reduced graphene oxide for methanol oxidation
Special microwave-assisted one-pot synthesis of low loading Pt- Ru alloy nanoparticles on reduced graphene oxide for methanol oxidation
复制标题
还原氧化石墨烯上特殊微波辅助一锅法合成低负载量 Pt-Ru 合金纳米颗粒用于甲醇氧化
DOI：
10.1049/mnl.2013.0525
复制
发表时间：
2014
影响因子：
1.3
通讯作者：
Ma Chun-An
中科院分区：
文献类型：
--
作者：
Zhao Di;Shi Mei-Qin;Liu Wei-Ming;Chu You-Qun;Ma Chun-An
在这项工作中，低负载铂-Ru合金纳米颗粒(PtRu纳米颗粒)通过自动功率调节微波辅助一锅法反应被高度分散在还原的石墨烯氧化物(PtRu/RGO)上。透射电子显微镜结果表明，PtRu纳米粒子的平均尺寸为∼2.99 nm，均匀分布在RGO表面。将制备的PtRu/RGO电催化剂用于甲醇氧化反应。与商品碳负载的铂-Ru合金电催化剂相比，PtRu/RGO复合材料表现出更高的电化学活性表面积和对MOR的优异电催化活性，如更高的峰电流密度、更低的起始电位和长期稳定性。结果表明，PtRu/RGO催化剂在甲醇氧化反应中的良好性能可以归因于RGO载体的特性，它提供了更有效的载体，提高了PtRu团簇的利用率，以及特殊的微波加热方式和较低的合成温度导致了高度分散的小尺寸铂-Ru合金纳米粒子，从而导致了铂和Ru之间的有效双功能机理。本研究证明PtRu/RGO复合材料是一种很有前途的直接甲醇燃料电池催化剂，这种有效的制备方法也可以广泛应用于其他金属/双金属纳米粒子。
In this reported work, low loading Pt–Ru alloy nanoparticles (PtRu NPs) have been highly dispersed on reduced graphene oxide (PtRu/RGO) via an auto‐power adjusting microwave‐assisted one‐pot reaction process. The transmission electron microscopy result shows that PtRu NPs with a mean size of ∼ 2.99 nm decorated uniformly on RGO. The prepared PtRu/RGO is used as an electrocatalyst for the methanol oxidation reaction (MOR). Compared with the commercial carbon‐supported Pt–Ru alloy electrocatalyst, the PtRu/RGO composites demonstrate higher electrochemical active surface area and excellent electrocatalytic activity towards the MOR, such as higher peak current density, lower onset potential and long‐term stability. It is deduced that the good performance of the PtRu/RGO towards methanol oxidation could be attributed to the characterised RGO support which provides more effective support and enhances the utilisation of the PtRu clusters, and to the highly dispersed small Pt–Ru alloy NPs resulting from the special microwave heating mode and lower synthesis temperature, which subsequently leads to a valid bifunctional mechanism between Pt and Ru. The present study proves that the PtRu/RGO composites could be a promising alternative catalyst for direct methanol fuel cells and this effective preparation method can be widely applied to other metal/bimetal NPs.