摘要
采用微波多元醇法合成了Pt/C、Pt-M(Fe、Co、Ni)/C电催化剂,通过X-射线衍射仪(XRD)和透射电镜(TEM)测试手段对催化剂的微观结构、表面形貌等物理性能进行表征,并对其电化学性能进行了比较。测试结果表明:催化剂均高度分散在Vulcan XC-72碳载体上,Pt/C、Pt-Fe/C、Pt-Ni/C和Pt-Co/C电催化剂的平均粒径分别为:3.4、2.6、2.8、3.1 nm。在室温28℃下测得的电化学性能结果表明:合成催化剂在甲醇中的氧化活性高低顺序为:Pt-Fe/C>Pt-Co/C>Pt-Ni/C>Pt/C,催化剂电催化性的稳定性高低顺序为:Pt-Ni/C>Pt-Co/C>Pt-Fe/C>Pt/C,合成的Pt-M/C电催化剂催化性能均比Pt/C催化剂高,掺入合金Fe、Co和Ni后的Pt-M/C催化剂均具有较好的抗CO中毒的能力。
Pt/C, Pt-M（Fe, Co, Ni）/C catalysts were prepared by intermittent microwave- assistant polyol process, and their microstructure and surface morphology were characterized by transmission electron microscopy （TEM） and X-ray diffraction （XRD）. The results show that the catalysts are highly dispersed on the Vulcan XC-72 carbon support, and the average particles size of Pt, Pt-Fe, Pt-Co and Pt-Ni nanoparticles are 3.4, 2.6, 2.8 nm and 3.1 nm respectively. The electrocatalytic performance of the samples were evaluated by cyclic voltammograms （CV） and polarization currents-time at 2 mol/L CH3OH/H2SO4 solutions and 28 ~C .The results show that the current and stability of electro-oxidation in methanol are Pt-Fe/C〉Pt-Co/C〉Pt-Ni/C〉Pt/C and Pt-Ni/C〉Pt-Co/C〉Pt-Fe/C〉Pt/C, and Pt-M/C catalysts have the larger electrochemical surface and preferable tolerance on CO than Pt/C.
出处
《电源技术》
CAS
CSCD
北大核心
2010年第11期1142-1145,共4页
Chinese Journal of Power Sources
基金
国家自然科学基金资助项目(20576129)
国家"863"计划课题(2006AA03Z223)
关键词
铂合金催化剂
间歇微波加热法
甲醇氧化性能
platinum alloy catalysts
intermittent microwave-heating
methanol electro-oxidation
