【摘要】 通过液相还原法制备了不同Pd/Ni摩尔比的Pd-Ni/C催化剂,并采用X射线衍射(XRD)、透射电子显微镜(TEM)和X射线光电子能谱(XPS)等手段对其进行了表征,总结了Ni的掺杂对Pd-Ni合金纳米粒子的尺寸及晶体结构的影响.电化学测试结果表明,适量Ni的掺杂不但能够增强催化剂对甲酸催化氧化的活性,而且还能够提高催化剂的稳定性.因此,Pd-Ni/C催化剂是一类具有潜在应用前景的直接甲酸燃料电池阳极催化剂.更多还原

【Abstract】 Pd-Ni/C catalysts with different Pd/Ni atomic ratios were prepared by the impregnation-reduction method.The catalysts were characterized by transmission electron microscopy(TEM),X-ray diffraction(XRD) and X-ray photoelectron spectroscopy(XPS).The results showed the effect on particle size and crystal structure of Pd-Ni alloy nanoparticles by adding Ni.The effect of Pd/Ni atomic ratios of Pd-Ni/C catalysts on the oxidation of formic acid were also demonstrated by several electrochemical measures.It was found that carbon-supported Pd-Ni(Pd-Ni/C) catalyst with the suitable atomic ratio of Pd and Ni for the oxidation of formic acid exhibits higher activity and stability.Therefore,the Pd-Ni/C nanoparticle is a promising anode catalyst in direct formic acid fuel cells.更多还原