XC-72碳和碳纳米管负载PtRu纳米粒子的微波快速合成及其对甲醇的电化学氧化

Rapid Synthesis of XC-72 and Carbon Nanotubes Supported PtRu Nanoparticles by Microwave Irradiation for Methanol Electrooxidation Application

利用微波辐射加热技术快速合成了XC 72碳和碳纳米管 (CNTs)负载的PtRu合金纳米粒子 ,合金负载的质量分数为2 0 % ,Pt和Ru的原子比接近于 1∶1.透射电镜观察表明微波合成的PtRu合金纳米粒子具有细小的粒径和狭窄的尺寸分布 ,所合成的PtRu合金纳米粒子高度分散在XC 72碳和CNTs的表面 ,其平均粒径分别为 3 .3nm和 2 .8nm .电化学实验表明微波合成的PtRu/XC

XC-72 carbon and carbon nanotubes (CNTs) supported PtRu alloy nanoparticles with Pt∶Ru of 1∶1 were rapidly prepared by microwave assisted heating polyol process. The PtRu loading was 20%. TEM observations showed that the microwave-synthesized PtRu nanoparticles had very small diameters and a sharp particle size distribution. These nanoparticles were highly dispersed on the surface of XC-72 carbon and CNTs with average diameter of 3.30 nm and 2.81 nm, respectively. Electrochemical measurements showed that the microwave-prepared PtRu/XC-72 and PtRu/CNTs nanocatalysts exhibited higher electrocatalytic activity for methanol oxidation at room temperature than PtRu/XC-72 catalyst prepared using KBH 4 as the reducing agent by wet chemical method.