用乙二胺四乙酸和Pt(NO3)2制备Pt/C催化剂及其形成机理  

Preparation and Mechanism of Carbon Supported Pt Catalyst Using Pt(NO_3)_2 and Ethylenediaminetetraacetic Acid

作　　者：谢国芳[1] 陆天虹[1,2] 杨改秀[3] 陈煜[1] 周益明[1] 唐亚文[1,4] 

机构地区：[1]南京师范大学化学与材料科学学院,南京210097 [2]中国科学院长春应用化学研究所,长春130022 [3]中国科学院广州能源研究所,可再生能源与天然气水合物重点实验室,广州510640 [4]南京理工大学材料化学实验室,南京210094

出　　处：《高等学校化学学报》2011年第6期1373-1377,共5页Chemical Journal of Chinese Universities

基　　金：国家“八六三”计划项目(批准号:2007AA05Z143,2007AA05Z159);国家自然科学基金(批准号:20873065,21073094)资助

摘　　要：采用乙二胺四乙酸(EDTA)作添加剂,Pt(NO3)2作前驱体制备了Pt/C催化剂,通过多种方法进行测试,并对形成机理进行了探讨.结果表明,加入的EDTA不能与Pt2+配位形成络合物,而是通过静电作用与Pt2+结合,使生成的Pt粒子不易团聚,得到的Pt/C催化剂中Pt粒子分布均匀,平均粒径约为3 nm.所制得的Pt/C催化剂对甲醇氧化具有很好的电催化活性和稳定性.Carbon supported Pt（Pt/C） catalyst was prepared using Pt（NO3）2 as the precursor and ethylenediaminetetraacetic acid（EDTA） as additive.The catalyst was characterized by X-ray diffraction（XRD） spectroscopy,transmission electron microscopy（TEM）,ultraviolet visible（UV-Vis） absorption spectroscopy,Fourier transform infrared（FTIR） spectroscopy and electrochemical methods.The measurement results indicate that EDTA could not coordinate with Pt^2＋,forming the complex.However,EDTA would combine to Pt^2＋ through the electrostatic interaction,leading to that the Pt particles obtained are not easy to be aggregated.Thus,when Pt（NO3）2 was used as the precursor,EDTA can also effectively reduce the average size of the Pt particles and improve the dispersion degree.The average size of the Pt particles in the Pt/C catalyst obtained is only 3 nm and the dispersion of the Pt particles is uniform.Therefore,the Pt/C catalyst obtained has the excellent electrocatalytic activity and stability for methanol oxidation.

关 键 词：PT/C催化剂 乙二胺四乙酸 直接甲醇燃料电池 静电作用 甲醇氧化 

分 类 号：O646[理学—物理化学] O613.71[理学—化学]