炭载Pd-Ni合金纳米粒子对甲酸的电催化氧化  

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

作　　者：奚彩明[1] 施毅[1] 赵佳越[1] 周益明[1] 唐亚文[1] 陈煜[1] 陆天虹[1] 

机构地区：[1]江苏省新型动力电池重点实验室,电化学实验室,南京师范大学化学与材料科学学院,南京210046

出　　处：《高等学校化学学报》2011年第6期1349-1353,共5页Chemical Journal of Chinese Universities

基　　金：国家自然科学基金(批准号:21073094);江苏省高校自然科学基金(批准号:10KJB150007);江苏省高校优势学科建设工程资助项目资助

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.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.

关 键 词：甲酸 Pd-Ni纳米粒子 催化剂 电催化氧化 直接甲酸燃料电池 

分 类 号：O646.5[理学—物理化学] O613.71[理学—化学]