Supporting PtRu catalysts on various types of carbon nanomaterials for fuel cell applications
Supporting PtRu catalysts on various types of carbon nanomaterials for fuel cell applications
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DOI：
10.1088/1742-6596/433/1/012008
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发表时间：
2013-04
期刊：
影响因子：
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通讯作者：
Y. Suda;M. Ozaki;H. Tanoue;H. Takikawa;H. Ue;K. Shimizu;H. Muramoto
中科院分区：
文献类型：
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作者：
Y. Suda;M. Ozaki;H. Tanoue;H. Takikawa;H. Ue;K. Shimizu;H. Muramoto
PtRu催化剂负载在五种不同形状、尺寸和石墨性质的碳纳米材料上，并对催化剂载体进行评价。所使用的碳纳米材料包括三种类型的纳米颗粒：Arc Black（AcB）、Vulcan XC-72（Vulcan）和氧化石墨烯（GO），以及两种类型的纳米纤维：碳纳米线圈（CNC）和碳纳米管（CNT）。Pt和Ru通过使用硼氢化钠的还原方法负载。通过热重分析（TGA）、电子显微镜和X射线衍射（XRD）确认金属催化剂负载。透射电子显微镜（TEM）和X射线衍射（XRD）显示，负载在还原GO（rGO）和AcB上的PtRu催化剂纳米颗粒的直径约为2 nm，是所有样品中最小的。CNC和CNT的Pt（111）XRD峰的位移大于AcB、Vulcan和rGO的那些。这些结果表明，催化剂纳米颗粒的直径通过负载在具有大表面积的碳纳米颗粒（包括rGO、AcB和Vulcan）上而变得更小。负载到碳纳米纤维上提高了PtRu合金化的程度。
PtRu catalysts were supported on five types of carbon nanomaterials of various shapes, sizes, and graphitic properties and the catalyst supports evaluated. The carbon nanomaterial used included three types of nanoparticles: Arc Black (AcB), Vulcan XC-72 (Vulcan) and graphene oxide (GO), and two types of nanofibers: carbon nanocoil (CNC) and carbon nanotube (CNT). Pt and Ru were supported by the reduction method using sodium borohydride. The metal catalyst loading was confirmed by thermo-gravimetric analysis (TGA), electron microscopy, and X-ray diffraction (XRD). Transmission electron microscopy (TEM) and XRD revealed that the diameter of PtRu catalyst nanoparticles loaded on reduced GO (rGO) and AcB were ~2 nm and was the smallest among all the samples. Shifts in Pt (111) XRD peaks of CNC and CNT were larger than those of AcB, Vulcan, and rGO. These results suggest that the diameters of catalyst nanoparticles became smaller by loading on the carbon nanoparticles with a large surface area including rGO, AcB, and Vulcan. Loading onto the carbon nanofibers enhanced the degree of PtRu alloying.