炭载Pd-Ni合金纳米粒子对甲酸的电催化氧化

通过液相还原法制备了具有不同原子比例的Pd-Ni/C催化剂，并且使用X射线衍射（XRD）、透射电子显微镜(TEM)和X射线光电子能谱(XPS) 等表征手段对制备的催化剂进行了表征，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：适量的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

Electrocatalytic Oxidation of Formic Acid on the Carbon Supported Pd-Ni Alloy Nanoparticles

Formic acid electrooxidation on Pd catalysts has been extensively investigated due to potential application in direct formic acid fuel cells. To improve the stability of catalysts and promote formic acid electrooxidation through the direct pathway, various Pd-based bimetallic catalysts has been received much attentions. In this work, the carbon-supported Pd-Ni (Pd-Ni/C) catalysts with different Pd/Ni atomic ratios are prepared by the impregnation-reduction method. These catalysts are characterized by transmission electron microscopy (TEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS). The resulting physicochemical characterizations indicate that particle size, crystal structure and electron structure of Pd nanoparticles by adding Ni element. In addition, the effect of Pd/Ni atomic ratios on electrocatalytic performance of Pd-Ni/C catalysts for formic acid electrooxidation is also demonstrated by several electrochemical measures. It is observed that Pd-Ni/C catalyst with the suitable Pd/Ni atomic ratio exhibits excellent electrocatalytic performance and stability for the formic acid electrooxidation.