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采用超声合成法制备了纳米铂/多壁碳纳米管复合催化剂(Pt/MWCNT),通过场发射扫描电镜(FE-SEM)、X-射线衍射(XRD)及电化学技术表征了该催化剂的性质。结果表明:纳米Pt均匀地镶嵌在MWCNTs表面,粒径为40±20nm。该催化剂对CO2的还原呈现良好的催化作用,可用作制备CO2电化学传感器,CO2在纳米铂/多壁碳纳米碳管修饰玻碳电极上的还原电流响应(Pt/MWCNTs/GCE),分别在1～10ppm和10～100ppm两个浓度范围内呈良好的线性关系,检测限为1ppm。
Nanostructured Pt / MWCNT composite catalysts were prepared by ultrasonic synthesis. The properties of the catalysts were characterized by field emission scanning electron microscopy (FE-SEM), X-ray diffraction (XRD) and electrochemical techniques . The results show that nano-Pt is uniformly embedded on the surface of MWCNTs with particle size of 40 ± 20nm. The catalyst has a good catalytic effect on the reduction of CO2 and can be used as a reduction electrochemical sensor for CO2 preparation. The reduction current response (Pt / MWCNTs / GCE) of CO2 on the Pt / MWCNT modified glassy carbon electrode In the concentration range of 1 ~ 10ppm and 10 ~ 100ppm showed a good linear relationship, the detection limit of 1ppm.